Strain engineering of Pt-based electrocatalysts for oxygen reaction reduction

Abstract

Proton exchange membrane fuel cells (PEMFCs) are playing irreplaceable roles in the construction of the future sustainable energy system. However, the insufficient performance of platinum (Pt)-based electrocatalysts for oxygen reduction reaction (ORR) hinders the overall efficiency of PEMFCs. Engineering the surface strain of catalysts is considered an effective way to tune their electronic structures and therefore optimize catalytic behavior. In this paper, insights into strain engineering for improving Pt-based catalysts toward ORR are elaborated in detail. First, recent advances in understanding the strain effects on ORR catalysts are comprehensively discussed. Then, strain engineering methodologies for adjusting Pt-based catalysts are comprehensively discussed. Finally, further information on the various challenges and potential prospects for strain modulation of Pt-based catalysts is provided.

Key words： strain engineering; Pt-based catalysts; oxygen reduction reaction (ORR); catalytic performance; proton exchange membrane fuel cells (PEMFCs)

Acknowledgements

This work was supported by the Natural Science Foundation of Shaanxi Province, China (Nos. 2023-JC-YB-122, 2024JC-YBQN-0072), the High-level Innovation and Entrepreneurship Talent Project from Qinchuangyuan of Shaanxi Province, China (No. QCYRCXM-2022-226), the Fundamental Research Funds for the Central Universities, China (No. D5000210987), the Joint Fund Project-Enterprise-Shaanxi Coal Joint Fund Project, China (No. 2021JLM-38), the National Natural Science Foundation of China (Grant No. 22379123, No. 22250710676), the Fujian Province Minjiang Scholar Program, China.

Competing interests

The authors declare that they have no competing interests.

References

1 Bai J, Yang L, Jin Z. . Advanced Pt-based intermetallic nanocrystals for the oxygen reduction reaction. Chinese Journal of Catalysis, 2022, 43(6): 1444–1458

2 Zhao J, Dong K, Dong X. . How renewable energy alleviate energy poverty? A global analysis. Renewable Energy, 2022, 186: 299–311

3 Yuan X, Su C W, Umar M, et al. The race to zero emissions: Can renewable energy be the path to carbon neutrality? Journal of Environmental Management, 2022, 308: 114648 10.1016/j.jenvman.2022.114648

4 Li H, Zhao H, Tao B. . Pt-based oxygen reduction reaction catalysts in proton exchange membrane fuel cells: Controllable preparation and structural design of catalytic layer. Nanomaterials, 2022, 12(23): 4173

5 Zhao X, Sasaki K. Advanced Pt-based core-shell electrocatalysts for fuel cell cathodes. Accounts of Chemical Research, 2022, 55(9): 1226–1236

6 Kong Z J, Zhang D C, Lu Y X. . Advanced cathode electrocatalysts for fuel cells: Understanding, construction, and application of carbon-based and platinum-based nanomaterials. ACS Materials Letters, 2021, 3(12): 1610-1634

7 Mao Z, Tang X, An X. . Defective nanomaterials for electrocatalysis oxygen reduction reaction. Frontiers in Chemistry, 2022, 10: 1023617

8 Zhang J, Yuan Y, Gao L. . Stabilizing Pt-based electrocatalysts for oxygen reduction reaction: Fundamental understanding and design strategies. Advanced Materials, 2021, 33(20): 2006494

9 Huang L, Zaman S, Tian X. . Advanced platinum-based oxygen reduction electrocatalysts for fuel cells. Accounts of Chemical Research, 2021, 54(2): 311–322

10 Xiao F, Wang Y C, Wu Z P. . Recent advances in electrocatalysts for proton exchange membrane fuel cells and alkaline membrane fuel cells. Advanced Materials, 2021, 33(50): 2006292

11 Mavrikakis M, Hammer B, Nørskov J K. Effect of strain on the reactivity of metal surfaces. Physical Review Letters, 1998, 81(13): 2819–2822

12 Hammer B, Norskov J K. Theoretical Surface Science and Catalysis—Calculations and Concepts. Academic Press: Cambridge, MA, USA, 2000, 45: 71–129. ISBN: 0360-0564.

13 Wang X M, Orikasa Y, Takesue Y. . Quantitating the lattice strain dependence of monolayer Pt shell activity toward oxygen reduction. Journal of the American Chemical Society, 2013, 135(16): 5938–5941

14 Suo N, Cao L, Qin X. . Research progress of Pt and Pt-based cathode electrocatalysts for proton-exchange membrane fuel cells. Chinese Physics B, 2022, 31(12): 128108

15 Zhang J, Yin S, Yin H M. Strain engineering to enhance the oxidation reduction reaction performance of atomic-layer Pt on nanoporous gold. ACS Applied Energy Materials, 2020, 3(12): 11956–11963

16 Ahn H, Ahn H, An J H. . Role of surface strain at nanocrystalline Pt{110} facets in oxygen reduction catalysis. Nano Letters, 2022, 22(22): 9115–9121

17 Luo Y, Lou W, Feng H. . Ultra-small nanoparticles of Pd−Pt−Ni alloy octahedra with high lattice strain for efficient oxygen reduction reaction. Catalysts, 2023, 13(1): 97

18 Kim S H, Kang Y, Ham H C. First-principles study of Pt-based bifunctional oxygen evolution & reduction electrocatalyst: Interplay of strain and ligand effects. Energies, 2021, 14(22): 7814

19 Hammer B, Nørskov J K. Electronic factors determining the reactivity of metal surfaces. Surface Science, 1995, 343(3): 211–220

20 Qi X Q, Yang T T, Li P B. . DFT study on ORR catalyzed by bimetallic Pt-skin metals over substrates of Ir, Pd and Au. Nano Materials Science, 2023, 5(3): 287–292

21 Gao P, Pu M, Chen Q J. . Pt-based intermetallic nanocrystals in cathode catalysts for proton exchange membrane fuel cells: From precise synthesis to oxygen reduction reaction strategy. Catalysts, 2021, 11(9): 1050

22 Jiao S, Fu X, Huang H. Descriptors for the evaluation of electrocatalytic reactions: d-band theory and beyond. Advanced Functional Materials, 2022, 32(4): 2107651

23 Zhang F, Ji R J, Zhu X Y. . Strain-regulated Pt−NiO@Ni sub-micron particles achieving bifunctional electrocatalysis for zinc-air battery. Small, 2023, 19(34): 2301640

24 Zhang X Q, Wang J Q, Zhao Y. Enhancement mechanism of Pt/Pd-based catalysts for oxygen reduction reaction. Nanomaterials, 2023, 13(7): 1275

25 Campos-Roldán C A, Chattot R, Filhol J S. . Structure dynamics of carbon-supported platinum-neodymium nanoalloys during the oxygen reduction reaction. ACS Catalysis, 2023, 13(11): 7417–7427

26 Wang Y, Wang D S, Li Y D. A fundamental comprehension and recent progress in advanced Pt-based ORR nanocatalysts. SmartMat, 2021, 2(1): 56–75

27 Liu X, Liang J S, Li Q. Design principle and synthetic approach of intermetallic Pt−M alloy oxygen reduction catalysts for fuel cells. Chinese Journal of Catalysis, 2023, 45: 17–26

28 Zhu W, Yuan H, Liao F. . Strain engineering for Janus palladium-gold bimetallic nanoparticles: Enhanced electrocatalytic performance for oxygen reduction reaction and zinc-air battery. Chemical Engineering Journal, 2020, 389: 124240

29 Nørskov J K, Rossmeisl J, Logadottir A. . Origin of the overpotential for oxygen reduction at a fuel-cell cathode. Journal of Physical Chemistry B, 2004, 108(46): 17886–17892

30 Dickens C F, Montoya J H, Kulkarni A R. . An electronic structure descriptor for oxygen reactivity at metal and metal-oxide surfaces. Surface Science, 2019, 681: 122–129

31 Kulkarni A, Siahrostami S, Patel A. . Understanding catalytic activity trends in the oxygen reduction reaction. Chemical Reviews, 2018, 118(5): 2302–2312

32 Wu M H, Chen C L, Zhao Y Z. . Atomic regulation of PGM electrocatalysts for the oxygen reduction reaction. Frontiers in Chemistry, 2021, 9: 699861

33 Xu Q N, Li G W, Zhang Y. . Descriptor for hydrogen evolution catalysts based on the bulk band structure effect. ACS Catalysis, 2020, 10(9): 5042–5048

34 Zhu X F, Tan X, Wu K H. . Intrinsic ORR activity enhancement of Pt atomic sites by engineering the d-band center via local coordination tuning. Angewandte Chemie International Edition, 2021, 60(40): 21911–21917

35 Men Y N, Su X Z, Li P. . Oxygen-inserted top-surface layers of Ni for boosting alkaline hydrogen oxidation electrocatalysis. Journal of the American Chemical Society, 2022, 144(28): 12661–12672

36 Garcia-Muelas R, Lopez N. Enhancement of the oxygen reduction reaction activity of Pt by tuning its d-band center via transition metal oxide support interactions. Nature Communications, 2019, 10(1): 4687

37 Ando F, Gunji T, Tanabe T. . Enhancement of the oxygen reduction reaction activity of Pt by tuning its d-band center via transition metal oxide support interactions. ACS Catalysis, 2021, 11(15): 9317–9332

38 Vojvodic A, Nørskov J K, Abild-Pedersen F. Electronic structure effects in transition metal surface chemistry. Topics in Catalysis, 2013, 57(1–4): 25–32

39 Hammer B, Norskov J K. Why gold is the noblest of all the metals. Nature, 1995, 376(6537): 238–240

40 Gross A. Adsorption at nanostructured surfaces from first principles. Journal of Computational and Theoretical Nanoscience, 2008, 5(5): 894–922

41 Fan C M, Li G M, Gu J J, et al. Molten-salt electrochemical deoxidation synthesis of platinum−neodymium nanoalloy catalysts for oxygen reduction reaction. Small, 2023, 19(40): 2300110

42 Zhang Y P, Su Z X, Wei H H. . Strategies to improve the oxygen reduction reaction activity on Pt−Bi bimetallic catalysts: a density functional theory study. Journal of Physical Chemistry Letters, 2023, 14(7): 1990–1998

43 Zhao Y, Wu Y, Liu J. . Dependent relationship between quantitative lattice contraction and enhanced oxygen reduction activity over Pt−Cu alloy catalysts. ACS Applied Materials & Interfaces, 2017, 9(41): 35740–35748

44 Kattel S, Wang G F. Beneficial compressive strain for oxygen reduction reaction on Pt(111) surface. Journal of Chemical Physics, 2014, 141(12): 124713

45 Stamenkovic V, Mun B S, Mayrhofer K J. . Changing the activity of electrocatalysts for oxygen reduction by tuning the surface electronic structure. Angewandte Chemie International Edition, 2006, 45(18): 2897–2901

46 Schnur S, Groß A. Strain and coordination effects in the adsorption properties of early transition metals: A density-functional theory study. Physical Review B: Condensed Matter and Materials Physics, 2010, 81(3): 033402

47 Chen H, Wu Q, Wang Y. . Correction: d-sp orbital hybridization: A strategy for activity improvement of transition metal catalysts. Chemical Communications, 2023, 59(22): 3317–3317

48 Escudero-Escribano M, Malacrida P, Hansen M H. . Tuning the activity of Pt alloy electrocatalysts by means of the lanthanide contraction. Science, 2016, 352(6281): 73–76

49 Ying J. Atomic-scale design of high-performance Pt-based electrocatalysts for oxygen reduction reaction. Frontiers in Chemistry, 2021, 9: 753604

50 Bu L Z, Zhang N, Guo S J. . Biaxially strained PtPb/Pt core/shell nanoplate boosts oxygen reduction catalysis. Science, 2016, 354(6318): 1410–1414

51 Li J R, Sharma S, Liu X M. . Hard-magnet L1₀-CoPt nanoparticles advance fuel cell catalysis. Joule, 2019, 3(1): 124–135

52 Pavlets A, Pankov I, Alekseenko A. Electrochemical activation and its prolonged effect on the durability of bimetallic Pt-based electrocatalysts for PEMFCs. Inorganics, 2023, 11(1): 45

53 Belenov S, Pavlets A, Paperzh K. . The PtM/C (M = Co, Ni, Cu, Ru) electrocatalysts: Their synthesis, structure, activity in the oxygen reduction and methanol oxidation reactions, and durability. Catalysts, 2023, 13(2): 243

54 Chen Y, Zhao X, Yan H. . Manipulating Pt-skin of porous network Pt−Cu alloy nanospheres toward efficient oxygen reduction. Journal of colloid and interface science, 2023, 652: 1006–1015

55 Becknell N, Kang Y J, Chen C. . Atomic structure of Pt₃Ni nanoframe electrocatalysts by in situ X-ray absorption spectroscopy. Journal of the American Chemical Society, 2015, 137(50): 15817–15824

56 Şahin O, Akdag A, Horoz S. . Effects of H₂/O₂ and H₂/O₃ gases on PtMo/C cathode PEMFCs performance operating at different temperatures. International Journal of Hydrogen Energy, 2023, 48(44): 16829–16840

57 Du M, Cui L, Cao Y. . Mechanoelectrochemical catalysis of the effect of elastic strain on a platinum nanofilm for the ORR exerted by a shape memory alloy substrate. Journal of the American Chemical Society, 2015, 137(23): 7397–7403

58 Mashindi V, Mente P, Phaahlamohlaka T N. . Platinum nanocatalysts supported on defective hollow carbon spheres: Oxygen reduction reaction durability studies. Frontiers in Chemistry, 2022, 10: 839867

59 Kong Z J, Maswadeh Y, Vargas J A. . Origin of high activity and durability of twisty nanowire alloy catalysts under oxygen reduction and fuel cell operating conditions. Journal of the American Chemical Society, 2020, 142(3): 1287–1299

60 Wu J F, Shan S Y, Cronk H. . Understanding composition-dependent synergy of PtPd alloy nanoparticles in electrocatalytic oxygen reduction reaction. Journal of Physical Chemistry C, 2017, 121(26): 14128–14136

61 Hurley N, Mcguire S C, Wong S S. Assessing the catalytic behavior of platinum group metal-based ultrathin nanowires using X-ray absorption spectroscopy. ACS Applied Materials & Interfaces, 2021, 13(49): 58253–58260

62 Feiten F E, Takahashi S, Sekizawa O. . Model building analysis—A novel method for statistical evaluation of Pt L₃-edge EXAFS data to unravel the structure of Pt-alloy nanoparticles for the oxygen reduction reaction on highly oriented pyrolytic graphite. Physical Chemistry Chemical Physics, 2020, 22(34): 18815–18823

63 Huang H, Li K, Chen Z. . Achieving remarkable activity and durability toward oxygen reduction reaction based on ultrathin Rh-doped Pt nanowires. Journal of the American Chemical Society, 2017, 139(24): 8152–8159

64 Sapkota P, Lim S, Aguey-Zinsou K F. Superior performance of an iron−platinum/vulcan carbon fuel cell catalyst. Catalysts, 2022, 12(11): 1369

65 Oubraham A, Ion-Ebrasu D, Vasut F. . Platinum-functionalized graphene oxide: One-pot synthesis and application as an electrocatalyst. Materials, 2023, 16(5): 1897

66 Spanos I, Dideriksen K, Kirkensgaard J J K. . Structural disordering of de-alloyed Pt bimetallic nanocatalysts: The effect on oxygen reduction reaction activity and stability. Physical Chemistry Chemical Physics, 2015, 17(42): 28044–28053

67 Jackson C, Smith G T, Mpofu N. . A quick and versatile one step metal-organic chemical deposition method for supported Pt and Pt-alloy catalysts. RSC Advances, 2020, 10(34): 19982–19996

68 Xie M H, Lyu Z H, Chen R H. . Pt−Co@Pt octahedral nanocrystals: Enhancing their activity and durability toward oxygen reduction with an intermetallic core and an ultrathin shell. Journal of the American Chemical Society, 2021, 143(22): 8509–8518

69 Tian W, Wang Y, Fu W. . PtP₂ nanoparticles on N,P doped carbon through a self-conversion process to core-shell Pt/PtP₂ as an efficient and robust ORR catalyst. Journal of Materials Chemistry. A, Materials for Energy and Sustainability, 2020, 8(39): 20463–20473

70 Zhang Y F, Qin J, Leng D Y. . Tunable strain drives the activity enhancement for oxygen reduction reaction on Pd@Pt core-shell electrocatalysts. Journal of Power Sources, 2021, 485: 229340

71 Guan J, Yang S, Liu T. . Intermetallic FePt@PtBi core-shell nanoparticles for oxygen reduction electrocatalysis. Angewandte Chemie International Edition, 2021, 60(40): 21899–21904

72 Wang K, Wang Y, Geng S. . High-temperature confinement synthesis of supported Pt−Ni nanoparticles for efficiently catalyzing oxygen reduction reaction. Advanced Functional Materials, 2022, 32(22): 2113399

73 Zhu Y, Wang S, Luo Q. . Facile synthesis of structurally ordered low-Pt-loading Pd−Pt−Fe nanoalloys with enhanced electrocatalytic performance for oxygen reduction reaction. Journal of Alloys and Compounds, 2021, 855: 157322

74 Hu Y, Shen T, Zhao X. . Combining structurally ordered intermetallics with N-doped carbon confinement for efficient and anti-poisoning electrocatalysis. Applied Catalysis B: Environmental, 2020, 279: 119370

75 Mondal S, Kumar M M, Raj C R. Electrochemically dealloyed Cu−Pt nanostructures for oxygen reduction and formic acid oxidation. ACS Applied Nano Materials, 2021, 4(12): 13149–13157

76 Song T W, Chen M X, Yin P. . Intermetallic PtFe electrocatalysts for the oxygen reduction reaction: Ordering degree-dependent performance. Small, 2022, 18(31): 2202916

77 Wang H T, Xu S C, Tsai C. . Direct and continuous strain control of catalysts with tunable battery electrode materials. Science, 2016, 354(6315): 1031–1036

78 Feng Y G, Huang B L, Yang C Y. . Platinum porous nanosheets with high surface distortion and Pt utilization for enhanced oxygen reduction catalysis. Advanced Functional Materials, 2019, 29(45): 1904429

79 Gong K P, Su D, Adzic R R. Platinum-monolayer shell on AuNi_0.5Fe nanoparticle core electrocatalyst with high activity and stability for the oxygen reduction reaction. Journal of the American Chemical Society, 2010, 132(41): 14364–14366

80 Feng Y G, Zhao Z L, Li F. . Highly surface-distorted Pt superstructures for multifunctional electrocatalysis. Nano Letters, 2021, 21(12): 5075–5082

81 Mahmood A, He D, Talib S H. . Strain-induced structure evolution of multimetallic nanoplates. Advanced Functional Materials, 2022, 32(40): 2205223

82 Qin Y, Zhang W, Guo K. . Fine-tuning intrinsic strain in penta-twinned Pt−Cu−Mn nanoframes boosts oxygen reduction catalysis. Advanced Functional Materials, 2020, 30(11): 1910107

83 Guo S J, Wang L, Dong S J. . A novel urchinlike gold/platinum hybrid nanocatalyst with controlled size. Journal of Physical Chemistry C, 2008, 112(35): 13510–13515

84 Xing Y C, Cai Y, Vukmirovic M B. . Enhancing oxygen reduction reaction activity via Pd−Au alloy sublayer mediation of Pt monolayer electrocatalysts. Journal of Physical Chemistry Letters, 2010, 1(21): 3238–3242

85 Javaheri M. Investigating the influence of Pd situation (as core or shell) in synthesized catalyst for ORR in PEMFC. International Journal of Hydrogen Energy, 2015, 40(20): 6661–6671

86 Adzic R R, Zhang J, Sasaki K. . Platinum monolayer fuel cell electrocatalysts. Topics in Catalysis, 2007, 46(3–4): 249–262

87 Kong J, Qin Y H, Wang T L. . Pd₉Au₁@Pt/C core-shell catalyst prepared via Pd₉Au₁-catalyzed coating for enhanced oxygen reduction. International Journal of Hydrogen Energy, 2020, 45(51): 27254–27262

88 Chong L, Wen J G, Kubal J. . Ultralow-loading platinum−cobalt fuel cell catalysts derived from imidazolate frameworks. Science, 2018, 362(6420): 1276–1281

89 Jiao W, Chen C, You W. . Tuning strain effect and surface composition in PdAu hollow nanospheres as highly efficient ORR electrocatalysts and SERS substrates. Applied Catalysis B: Environmental, 2020, 262: 118298

90 Lu Y, Zhang H, Wang Y. . First principles study on the oxygen reduction reaction of Ir@Pt core-shell structure. Chemical Physics, 2022, 552: 111356

91 Tetteh E B, Gyan-Barimah C, Lee H Y. . Strained Pt(221) facet in a PtCo@Pt-rich catalyst boosts oxygen reduction and hydrogen evolution activity. ACS Applied Materials & Interfaces, 2022, 14(22): 25246–25256

92 Cong Y, Wang H, Meng F. . One-pot synthesis of NiPt core–shell nanoparticles toward efficient oxygen reduction reaction. Journal of Solid State Electrochemistry, 2022, 26(6–7): 1381–1388

93 Su K, Zhang H, Qian S. . Atomic crystal facet engineering of core-shell nanotetrahedrons restricted under sub-10 nanometer region. ACS Nano, 2021, 15(3): 5178–5188

94 Shi Y, Lee C, Tan X. . Atomic-level metal electrodeposition: Synthetic strategies, applications, and catalytic mechanism in electrochemical energy conversion. Small Structures, 2022, 3(3): 2270012

95 Dai Y, Chen S. AuPt core-shell electrocatalysts for oxygen reduction reaction through combining the spontaneous Pt deposition and redox replacement of underpotential-deposited Cu. International Journal of Hydrogen Energy, 2016, 41(48): 22976–22982

96 Lee C L, Huang K L, Tsai Y L. . A comparison of alloyed and dealloyed silver/palladium/platinum nanoframes as electrocatalysts in oxygen reduction reaction. Electrochemistry Communications, 2013, 34: 282–285

97 Wang C, An C, Qin C. . Noble metal-based catalysts with core-shell structure for oxygen reduction reaction: progress and prospective. Nanomaterials, 2022, 12(14): 2480

98 Sasaki K, Naohara H, Choi Y. . Highly stable Pt monolayer on PdAu nanoparticle electrocatalysts for the oxygen reduction reaction. Nature Communications, 2012, 3(1): 1115

99 Alia S M, Yan Y S, Pivovar B S. Galvanic displacement as a route to highly active and durable extended surface electrocatalysts. Catalysis Science & Technology, 2014, 4(10): 3589–3600

100 Zhu Y M, Peng J H, Zhu X R. . A large-scalable, surfactant-free, and ultrastable Ru-doped Pt₃Co oxygen reduction catalyst. Nano Letters, 2021, 21(15): 6625–6632

101 Pang F, Yao C, Li A, et al. Research progress of PtNi alloy catalysts for oxygen reduction reaction. Material Report, 2023, 37(1): 20070194-9 (in Chinese)

102 Li M, Hu Z, Li H. . Pt−Ni alloy nanoparticles via high-temperature shock as efficient electrocatalysts in the oxygen reduction reaction. ACS Applied Nano Materials, 2022, 5(6): 8243–8250

103 Hu X, Liu T, Zhang X. . Nitrogen-functionalized carbon nanotube-supported bimetallic PtNi nanoparticles for hydrogen generation from hydrous hydrazine. Chemical Communications, 2021, 57(67): 8324–8327

104 Lyu X, Zhang W, Liu S. . A magnetic field strategy to porous Pt−Ni nanoparticles with predominant(111) facets for enhanced electrocatalytic oxygen reduction. Journal of Energy Chemistry, 2021, 53: 192–196

105 Jeon T Y, Yu S H, Yoo S J. . Electrochemical determination of the degree of atomic surface roughness in Pt–Ni alloy nanocatalysts for oxygen reduction reaction. Carbon Energy, 2021, 3(2): 375–383

106 Liu D, Zhang Y, Liu H. . Acetic acid-assisted mild dealloying of fine CuPd nanoalloys achieving compressive strain toward high-efficiency oxygen reduction and ethanol oxidation electrocatalysis. Carbon Energy, 2023, 5(7): e324

107 Sethuraman V A, Vairavapandian D, Lafouresse M C. . Role of elastic strain on electrocatalysis of oxygen reduction reaction on Pt. Journal of Physical Chemistry C, 2015, 119(33): 19042–19052

108 Chen H, Wang G, Gao T. . Effect of atomic ordering transformation of PtNi nanoparticles on alkaline hydrogen evolution: Unexpected superior activity of the disordered phase. Journal of Physical Chemistry C, 2020, 124(9): 5036–5045

109 Mondal S, Bagchi D, Riyaz M. . In situ mechanistic insights for the oxygen reduction reaction in chemically modulated ordered intermetallic catalyst promoting complete electron transfer. Journal of the American Chemical Society, 2022, 144(26): 11859–11869

110 Yan W, Cao S, Liu H. . Facile solid-phase method for preparing a highly active and stable PtZn-based oxygen reduction/hydrogen evolution bifunctional electrocatalyst: Effect of Bi-facet lattice strain on catalytic activity. ACS Applied Energy Materials, 2022, 5(11): 13791–13801

111 Sarkar S, Peter S C. An overview on Pt₃X electrocatalysts for oxygen reduction reaction. Chemistry, an Asian Journal, 2021, 16(10): 1184–1197

112 Xiao W, Lei W, Gong M. . Recent advances of structurally ordered intermetallic nanoparticles for electrocatalysis. ACS Catalysis, 2018, 8(4): 3237–3256

113 Gunji T, Tanaka S, Inagawa T. . Atomically ordered Pt₅La nanoparticles as electrocatalysts for the oxygen reduction reaction. ACS Applied Nano Materials, 2022, 5(4): 4958–4965

114 Ye X, Shao R Y, Yin P. . Ordered intermetallic PtCu catalysts made from Pt@Cu core/shell structures for oxygen reduction reaction. Inorganic Chemistry, 2022, 61(38): 15239–15246

115 Chung D Y, Jun S W, Yoon G. . Highly durable and active PtFe nanocatalyst for electrochemical oxygen reduction reaction. Journal of the American Chemical Society, 2015, 137(49): 15478–15485

116 Kim H Y, Kim J Y, Joo S H. Pt-based intermetallic nanocatalysts for promoting the oxygen reduction reaction. Bulletin of the Korean Chemical Society, 2021, 42(5): 724–736

117 Kim H Y, Joo S H. Recent advances in nanostructured intermetallic electrocatalysts for renewable energy conversion reactions. Journal of Materials Chemistry. A, Materials for Energy and Sustainability, 2020, 8(17): 8195–8217

118 Fracchia M, Ghigna P, Marelli M. . Molecular cluster route for the facile synthesis of a stable and active Pt nanoparticle catalyst. New Journal of Chemistry, 2021, 45(25): 11292–11303

119 Sarkar S, Varghese M, Vinod C P. . Correction: Conductive interface promoted bifunctional oxygen reduction/evolution activity in an ultra-low precious metal based hybrid catalyst. Chemical Communications, 2021, 57(22): 2824–2824

120 Shao M, Odell J H, Peles A. . The role of transition metals in the catalytic activity of Pt alloys: Quantification of strain and ligand effects. Chemical Communications, 2014, 50(17): 2173–2176

121 Xia Z, Zhu R, Yu R. . Review—Recent progress in highly efficient oxygen reduction electrocatalysts: From structural engineering to performance optimization. Journal of the Electrochemical Society, 2022, 169(3): 034512

122 Luo M C, Qin Y N, Li M G. . Interface modulation of twinned PtFe nanoplates branched 3D architecture for oxygen reduction catalysis. Science Bulletin, 2020, 65(2): 97–104

123 Dubau L, Nelayah J, Asset T. . Implementing structural disorder as a promising direction for improving the stability of PtNi/C nanoparticles. ACS Catalysis, 2017, 7(4): 3072–3081

124 Gao P, Zhu Z, Ye X. . Defects evolution in nanoporous Au(Pt) during dealloying. Scripta Materialia, 2016, 113: 68–70

125 Dubau L, Nelayah J, Moldovan S. . Defects do catalysis: Co monolayer oxidation and oxygen reduction reaction on hollow PtNi/C nanoparticles. ACS Catalysis, 2016, 6(7): 4673–4684

126 Asset T, Chattot R, Drnec J. . Elucidating the mechanisms driving the aging of porous hollow PtNi/C nanoparticles by means of CO_ads stripping. ACS Applied Materials & Interfaces, 2017, 9(30): 25298–25307

127 Zhu E B, Li Y J, Chiu C Y. . In situ development of highly concave and composition-confined PtNi octahedra with high oxygen reduction reaction activity and durability. Nano Research, 2016, 9(1): 149–157

128 Chattot R, Asset T, Bordet P. . Beyond strain and ligand effects: microstrain-induced enhancement of the oxygen reduction reaction kinetics on various PtNi/C nanostructures. ACS Catalysis, 2017, 7(1): 398–408

129 Bu L, Huang B, Zhu Y. . Highly distorted platinum nanorods for high-efficiency fuel cell catalysis. CCS Chemistry, 2020, 2(5): 401–412

130 Fan C, Huang Z, Hu X. . Freestanding Pt nanosheets with high porosity and improved electrocatalytic performance toward the oxygen reduction reaction. Green Energy & Environment, 2018, 3(4): 310–317

131 Marković N M, Schmidt T J, Stamenkovic V. . Oxygen reduction reaction on Pt and Pt bimetallic surfaces: A selective review. Fuel Cells, 2001, 1(2): 105–116

132 Sun L, Wang Q, Ma M. . Etching-assisted synthesis of single atom Ni-tailored Pt nanocatalyst enclosed by high-index facets for active and stable oxygen reduction catalysis. Nano Energy, 2022, 103: 107800

133 Luo M C, Sun Y J, Zhang X. . Stable high-index faceted Pt skin on zigzag-like PtFe nanowires enhances oxygen reduction catalysis. Advanced Materials, 2018, 30(10): 1705515

134 Wang Y J, Zhao N, Fang B. . Carbon-supported Pt-based alloy electrocatalysts for the oxygen reduction reaction in polymer electrolyte membrane fuel cells: Particle size, shape, and composition manipulation and their impact to activity. Chemical Reviews, 2015, 115(9): 3433–3467

135 Wang C, Daimon H, Onodera T. . A general approach to the size- and shape-controlled synthesis of platinum nanoparticles and their catalytic reduction of oxygen. Angewandte Chemie International Edition, 2008, 47(19): 3588–3591

136 Zhang W, Li J, Wei Z. How size and strain effect synergistically improve electrocatalytic activity: A systematic investigation based on PtCoCu alloy nanocrystals. Small, 2023, 19(29): 2300112

137 Shao M, Peles A, Shoemaker K. Electrocatalysis on platinum nanoparticles: Particle size effect on oxygen reduction reaction activity. Nano Letters, 2011, 11(9): 3714–3719

138 Đukić T, Moriau L J, Pavko L. . Understanding the crucial significance of the temperature and potential window on the stability of carbon supported Pt-alloy nanoparticles as oxygen reduction reaction electrocatalysts. ACS Catalysis, 2022, 12(1): 101–115

139 Zaman S, Huang L, Douka A I. . Oxygen reduction electrocatalysts toward practical fuel cells: Progress and perspectives. Angewandte Chemie International Edition, 2021, 60(33): 17832–17852

140 Bu L Z, Ding J B, Guo S J. . A general method for multimetallic platinum alloy nanowires as highly active and stable oxygen reduction catalysts. Advanced Materials, 2015, 27(44): 7204–7212

141 Li D G, Wang C, Strmcnik D S. . Functional links between Pt single crystal morphology and nanoparticles with different size and shape: The oxygen reduction reaction case. Energy & Environmental Science, 2014, 7(12): 4061–4069

142 An W, Liu P. Size and shape effects of Pd@Pt core-shell nanoparticles: Unique role of surface contraction and local structural flexibility. Journal of Physical Chemistry C, 2013, 117(31): 16144–16149

143 Li L, Ye X T, Xiao Q. . Nanostructure engineering of Pt/Pd-based oxygen reduction reaction electrocatalysts. Physical Chemistry Chemical Physics, 2023, 25(44): 30172–30187

144 Li Y, Wang H H, Priest C. . Advanced electrocatalysis for energy and environmental sustainability via water and nitrogen reactions. Advanced Materials, 2021, 33(6): 2000381

145 Zheng X Q, Li L, Li J. . Intrinsic effects of strain on low- index surfaces of platinum: Roles of the five 5d orbitals. Physical Chemistry Chemical Physics, 2019, 21(6): 3242–3249