Photocatalytic C–N Coupling to High-Value Chemicals from Waste Plastic and Biomass Feedstocks

Abstract

Photocatalytic C–N coupling reactions using waste plastic- and biomass-based feedstocks with nitrogen-containing species have emerged as a promising route for the synthesis of high-value chemicals such as amides and amino acids. However, the complexity of multistep reaction routes and the presence of competing side reactions pose significant challenges, often leading to low yield and poor selectivity of target products. To substantially enhance the efficiency and selectivity of C–N coupling reactions, it is imperative to gain a thorough understanding of the underlying reaction mechanisms and to develop highly active photocatalysts. Such catalysts must be capable of effectively activating diverse substrates while maintaining an appropriate balance between the adsorption and desorption of carbon- and nitrogen-containing intermediates or radical species. In this review, we systematically summarize recent advances in photocatalytic C–N coupling for the production of amides and amino acids from waste plastic- and biomass-based feedstocks, with particular focus on catalyst selection, process design, control of reaction intermediates, and catalytic mechanisms. Furthermore, the technoeconomic feasibility and environmental impact of these C–N coupling reactions are evaluated using technoeconomic analysis and life-cycle assessment. Lastly, the current challenges and future prospects in this field are also discussed. This review aims to provide valuable insights for the development of high-efficiency photocatalytic C–N coupling reactions and to deepen the understanding of their catalytic mechanisms.

Graphical Abstract

Keywords

C–N coupling / Waste plastic- and biomass-based feedstocks / Photocatalytic / High-value chemicals / Reaction mechanism

References

[1] Xu S, Li J, Cheng J, et al. . Single atom–cluster synergy in Ag catalysts enables chiral glyceric acid from biomass. Sci Adv, 2025, 11(47): eadz4136

[2] Latine H, Vangestel D, Pandalone B, et al. . From lignocellulose to sustainable aviation fuel: innovative synthesis through friedel–Crafts alkylation and hydrodeoxygenation. Angew Chem Int Ed, 2025, 64(49): e202514840

[3] Liang Y, Zhou H, Liang X, et al. . Defective metal–organic frameworks confined PdO with high resistance to reduction: an efficient photocatalyst for hydrodeoxygenation of lignin derivatives. ACS Nano, 2025, 19(21): 20153-20162

[4] Guo C, Zhang L-Q, Jiang W. Biodegrading plastics with a synthetic non-biodegradable enzyme. Chem, 2023, 9(2): 363-376

[5] Wu Y, Tang X, Qian S, et al. . Efficient chemical recycling of mixed plastics by intramolecular glycolysis. AIChE J, 2025, 71(12): e70064

[6] Zhang W, Hao X, Liu X, et al. . Photocatalytic conversion of polyester-derived alcohol into value-added chemicals by engineering atomically dispersed Pd catalyst. Angew Chem Int Ed, 2025, 64(18): e202500814

[7] Bariwal J, Van der Eycken E. C–N bond forming cross-coupling reactions: an overview. Chem Soc Rev, 2013, 42(24): 9283-9303

[8] Pattabiraman VR, Bode JW. Rethinking amide bond synthesis. Nature, 2011, 480(7378): 471-479

[9] Tao Z, Rooney CL, Liang Y, et al. . Accessing organonitrogen compounds via C–N coupling in electrocatalytic CO₂ reduction. J Am Chem Soc, 2021, 143(47): 19630-19642

[10] Beyazay T, Martin WF, Tuysuz H. Direct synthesis of formamide from CO₂ and H₂O with nickel–iron nitride heterostructures under mild hydrothermal conditions. J Am Chem Soc, 2023, 145(36): 19768-19779

[11] Massolo E, Pirola M, Benaglia M. Amide bond formation strategies: latest advances on a dateless transformation. Eur J Org Chem, 2020, 2020(30): 4641-4651

[12] Soyer Z, Kılıc FS, Erol K, et al. . The synthesis and anticonvulsant activity of some ω-phthalimido-N-phenylacetamide and propionamide derivatives. Arch Pharm, 2004, 337(2): 105-111

[13] Wu Y, Chen Y, Zhang Z, et al. . Organic–inorganic hybrid photocatalysts for solar-driven H₂O₂ production: a review. Trans Tianjin Univ, 2025, 31: 1-20

[14] Strecker A. Ueber die künstliche bildung der milchsäure und einen neuen, dem glycocoll homologen körper. Justus Liebigs Ann Chem, 1850, 75(1): 27-45

[15] D’Este M, Alvarado-Morales M, Angelidaki I. Amino acids production focusing on fermentation technologies—a review. Biotechnol Adv, 2018, 36(1): 14-25

[16] Shindell D, Smith CJ. Climate and air-quality benefits of a realistic phase-out of fossil fuels. Nature, 2019, 573(7774): 408-411

[17] Lee S, Bae H-S, Choi W. Selective control and characteristics of water oxidation and dioxygen reduction in environmental photo (electro) catalytic systems. Acc Chem Res, 2023, 56(7): 867-877

[18] Tan H, Zhou P, Liu M, et al. . Photocatalysis of water into hydrogen peroxide over an atomic Ga-N₅ site. Nat Synth, 2023, 2(6): 557-563

[19] Pi S, Yang W, Feng W, et al. . Solar-driven waste-to-chemical conversion by wastewater-derived semiconductor biohybrids. Nat Sustain, 2023, 6(12): 1673-1684

[20] Li J, Chen R, Wang J, et al. . Subnanometric alkaline-earth oxide clusters for sustainable nitrate to ammonia photosynthesis. Nat Commun, 2022, 13(1): 1098

[21] Li J, Chen R, Wang J, et al. . Dynamic in situ formation of Cu₂O sub-nanoclusters through photoinduced pseudo-fehling’s reaction for selective and efficient nitrate-to-ammonia photosynthesis. Angew Chem Int Ed, 2024, 136(7): e202317575

[22] Shi Y, Liu Y, Li Q, et al. . Nitrogen-doped metal–organic frameworks for boosting photocatalytic ammonia synthesis. Trans Tianjin Univ, 2025,

[23] Ji W, Kong X, Zhu J, et al. . Oxygen vacancy in CeO₂ enhanced low-temperature ammonia synthesis over Fe-based catalysts. Trans Tianjin Univ, 2025,

[24] Chen W, Yang X, Huang T, et al. . Constructing flexible composite electrodes of low crystalline cobalt (oxy)hydroxides nanosheet grown on carbon fiber cloth via self-reconstruction for electrochemical nitrate-to-ammonia conversion. Compos Commun, 2023, 43 101715

[25] Wang K, Mao R, Liu R, et al. . Intentional corrosion-induced reconstruction of defective NiFe layered double hydroxide boosts electrocatalytic nitrate reduction to ammonia. Nat Water, 2023, 1: 1068-1078

[26] Wang Y, Xu A, Wang Z, et al. . Enhanced nitrate-to-ammonia activity on copper-nickel alloys via tuning of intermediate adsorption. J Am Chem Soc, 2020, 142: 5702-5708

[27] Wu L, Feng J, Zhang L, et al. . Boosting electrocatalytic nitrate‐to‐ammonia via tuning of N‐intermediate adsorption on a Zn−Cu catalyst. Angew Chem Int Ed, 2023, 62(43): e202307952

[28] Zhan P, Zhuang J, Yang S, et al. . Efficient electrosynthesis of urea over single-atom alloy with electronic metal support interaction. Angew Chem Int Ed, 2024, 63(33): e202409019

[29] Speltini A, Scalabrini A, Maraschi F, et al. . Improved photocatalytic H₂ production assisted by aqueous glucose biomass by oxidized g-C₃N₄. Int J Hydrogen Energy, 2018, 43: 14925-14933

[30] Ji W, Kong X, Zhu J, et al. . Oxygen vacancy in CeO₂ enhanced low-temperature ammonia synthesis over Fe-based catalysts. Trans Tianjin Univ, 2025, 31(4): 403-410

[31] Fakhrutdinova ED, Reutova OA, Bugrova TA, et al. . Highly defective dark TiO₂ modified with Pt: effects of precursor nature and preparation method on photocatalytic properties. Trans Tianjin Univ, 2024, 30: 198-209

[32] Li J, Zhang Y, Kuruvinashetti K, et al. . Construction of C–N bonds from small-molecule precursors through heterogeneous electrocatalysis. Nat Rev Chem, 2022, 6: 303-319

[33] Wang M, Khan MA, Mohsin I, et al. . Can sustainable ammonia synthesis pathways compete with fossil-fuel based Haber-Bosch processes?. Energy Environ Sci, 2021, 14: 2535-2548

[34] Li J, Liu T, Singh N, et al. . Photocatalytic C–N bond construction toward high-value nitrogenous chemicals. Chem Commun, 2023, 59(97): 14341-14352

[35] Li J, Sudarsanam P, Li H. Light-assisted dual catalysis for C–N bond construction. Trends Chem, 2023, 5(9): 649-652

[36] Zuo L, Yang C, Tang Z. Electrifying CO₂ coupling with small molecules. Adv Funct Mater, 2025, 35(35): 2502233

[37] Zhang Y, Yu Q, Wang X, et al. . Conversion of nitrogenous small molecules into value-added chemicals by building N–C bonds. Chem Eng J, 2023, 474 145899

[38] Wan Y, Zheng M, Yan W, et al. . Fundamentals and rational design of heterogeneous C–N coupling electrocatalysts for urea synthesis at ambient conditions. Adv Energy Mater, 2024, 14(28): 2303588

[39] Song Q, Zhang Y, Gu L, et al. . C–N electro-coupling of CO₂/bio-derived carbonaceous molecules and nitrogenous small molecules: mechanism, catalysts, and applications. Coord Chem Rev, 2024, 522 216248

[40] Xu M, Wang M, Wang H, et al. . Electrocatalytic and photocatalytic C–N coupling from small molecules. Adv Mater, 2025, 327122454

[41] Zhong Y, Xiong H, Low J, et al. . Recent progress in electrochemical C–N coupling reactions. eScience, 2022, 3(1): 100086

[42] Gallagher J. Breaking down biomass. Nat Energy, 2018, 3(3): 162-162

[43] Xue W, Ye J, Zhu Z, et al. . Harnessing trace water for enhanced photocatalytic oxidation of biomass-derived alcohols to aldehydes. Energy Environ Sci, 2025, 18(1): 214-226

[44] Xu X, Shi L, Zhang S, et al. . Photocatalytic reforming of lignocellulose: a review. Chem Eng J, 2023, 469 143972

[45] Zhao Z, Yue S, Yang G, et al. . A unified view of carbon neutrality: solar-driven selective upcycling of waste plastics. Trans Tianjin Univ, 2024, 30(1): 1-26

[46] Puga AV. Photocatalytic production of hydrogen from biomass-derived feedstocks. Coord Chem Rev, 2016, 315: 1-66

[47] Huang Z, Luo N, Zhang C, et al. . Radical generation and fate control for photocatalytic biomass conversion. Nat Rev Chem, 2022, 6(3): 197-214

[48] Iervolino G, Vaiano V, Murcia J, et al. . Photocatalytic hydrogen production from degradation of glucose over fluorinated and platinized TiO₂ catalysts. J Catal, 2016, 339: 47-56

[49] Bai F-Y, Han J-R, Chen J, et al. . The three-dimensionally ordered microporous CaTiO₃ coupling Zn_0.3Cd_0.7S quantum dots for simultaneously enhanced photocatalytic H₂ production and glucose conversion. J Colloid Interface Sci, 2023, 638: 173-183

[50] Saraev AA, Kurenkova AY, Mishchenko DD, et al. . Cu/TiO₂ photocatalysts for CO₂ reduction: structure and evolution of the cocatalyst active form. Trans Tianjin Univ, 2024, 30(2): 140-151

[51] Lin X, Zhen S, Wang X, et al. . Data-driven design of single-atom electrocatalysts with intrinsic descriptors for carbon dioxide reduction reaction. Trans Tianjin Univ, 2024, 30(5): 459-469

[52] Balaji TE, Tanaya Das H, Maiyalagan T. Recent trends in bimetallic oxides and their composites as electrode materials for supercapacitor applications. ChemElectroChem, 2021, 8: 1723-1746

[53] Mudhoo A, Paliya S, Goswami P, et al. . Fabrication, functionalization and performance of doped photocatalysts for dye degradation and mineralization: a review. Environ Chem Lett, 2020, 18: 1825-1903

[54] Uekert T, Kasap H, Reisner E. Photoreforming of nonrecyclable plastic waste over a carbon nitride/nickel phosphide catalyst. J Am Chem Soc, 2019, 141(38): 15201-15210

[55] Achilleos DS, Yang W, Kasap H, et al. . Solar reforming of biomass with homogeneous carbon dots. Angew Chem Int Ed, 2020, 59(41): 18184-18188

[56] Jiao X, Zheng K, Chen Q, et al. . Photocatalytic conversion of waste plastics into C2 fuels under simulated natural environment conditions. Angew Chem Int Ed, 2020, 59(36): 15497-15501

[57] Lam E, Reisner E. A TiO₂-Co(terpyridine)₂ photocatalyst for the selective oxidation of cellulose to formate coupled to the reduction of CO₂ to syngas. Angew Chem Int Ed, 2021, 133(43): 23494-23500

[58] Du M, Zhang Y, Kang S, et al. . Trash to treasure: photoreforming of plastic waste into commodity chemicals and hydrogen over MoS₂-tipped CdS nanorods. ACS Catal, 2022, 12(20): 12823-12832

[59] Xiong L, Qi H, Zhang S, et al. . Highly selective transformation of biomass derivatives to valuable chemicals by single‐atom photocatalyst Ni/TiO₂. Adv Mater, 2023, 35(16): 2209646

[60] Zhang S, Li H, Wang L, et al. . Boosted photoreforming of plastic waste via defect-rich NiPS₃ nanosheets. J Am Chem Soc, 2023, 145(11): 6410-6419

[61] Li M, Zhang S. Coupling waste plastic upgrading and CO₂ photoreduction to high-value chemicals by a binuclear Re–Ru heterogeneous catalyst. ACS Catal, 2024, 14(9): 6717-6727

[62] Yang J, Zhou H, Luo J, et al. . Photothermal conversion of biopolyols and sugars into syngas over Pd–PdO/TiO₂. ACS Catal, 2025, 15(3): 1663-1671

[63] Jiang M, Li J, Wan X, et al. . Floatable organic-inorganic hybrid-TiO₂ unlocks superoxide radicals for plastic photoreforming in neutral solution. Nat Commun, 2025, 16(1): 4136

[64] Dou Z, Zhang Z, Zhou H, et al. . Photocatalytic upgrading of lignin oil to diesel precursors and hydrogen. Angew Chem Int Ed, 2021, 60(30): 16399-16403

[65] Zhang Y, Qi M-Y, Conte M, et al. . Efficient photoredox Co-upcycling of CO₂ and plastic waste by band-gap-engineered Zn_x Cd_1–xS catalyst. ACS Mater Lett, 2024, 7(1): 359-367

[66] Ouyang W, Zhao J, Chen J, et al. . ZrO₂/Bi₁₉S₂₇Br₃ heterojunction with a strong coupled interface for efficient CO₂ photoreduction to yield CH₄. Trans Tianjin Univ, 2025, 31(5): 437-451

[67] Song Y, Sun Z, Sun J, et al. . MOF-derived oxygen-vacancy-rich ZrO₂/UiO-66-NH₂ for efficient visible-light-driven oxidation of benzyl alcohol. Trans Tianjin Univ, 2025, 31(4): 421-435

[68] Wang E, Mahmood A, Chen S-G, et al. . Solar-driven photocatalytic reforming of lignocellulose into H₂ and value-added biochemicals. ACS Catal, 2022, 12(18): 11206-11215

[69] Cwieka K, Bojarska Z, Czelej K, et al. . Zero carbon footprint hydrogen generation by photoreforming of methanol over TiO₂/Cu nanocomposite. Chem Eng J, 2023, 474 145687

[70] Shan T, Li Y, Ke S, et al. . An embedded ReS₂@ MAPbBr₃ heterostructure with downhill interfacial charge transfer for photocatalytic upgrading of biomass-derived alcohols to aldehydes and H₂. J Mater Sci Technol, 2024, 179: 155-165

[71] Gao R, Zhang Y, Han C, et al. . Integrating biomass and minerals into photocatalysts for efficient photocatalytic N₂ fixation coupled with biomass conversion. Green Chem, 2023, 25(21): 8706-8717

[72] You Y, Han P, Song S, et al. . Distinct selectivity control in solar-driven bio-based α-hydroxyl acid conversion: a comparison of Pt nanoparticles and atomically dispersed Pt on CdS. Angew Chem Int Ed, 2023, 62(43): e202306452

[73] Wang B, Li M, Zhang S, et al. . Synergistic effect between Co single atoms and nanoparticles enables selective synthesis of bio-based benzimidazoles. Appl Catal B Environ, 2023, 327 122454

[74] Shi C, Xia K, Zhang L, et al. . Nitric acid-mediated artificial urea photo-synthesis with N₂ And CO₂. Adv Energy Mater, 2024, 14(22): 2400201

[75] Zhang Y, Sun Y, Wang Q, et al. . Synergy of photogenerated electrons and holes toward efficient photocatalytic urea synthesis from CO₂ and N₂. Angew Chem Int Ed, 2024, 63(32): e202405637

[76] Jouny M, Lv J-J, Cheng T, et al. . Formation of carbon-nitrogen bonds in carbon monoxide electrolysis. Nat Chem, 2019, 11: 846-851

[77] Fang Y, Liu X, Liu Z, et al. . Synthesis of amino acids by electrocatalytic reduction of CO₂ on chiral Cu surfaces. Chem, 2022, 9: 460-471

[78] Kakumoto T, Saito K, Imamura A. Thermal decomposition of formamide: shock tube experiments and ab initio calculations. J Chem Phys, 1985, 89(11): 2286-2291

[79] van Langevelde PH, Katsounaros I, Koper MTM. Electrocatalytic nitrate reduction for sustainable ammonia production. Joule, 2021, 5: 290-294

[80] Xu J, Zhai G, Wang G, et al. . Continuous flow photocatalysis boosting C–N coupling for sustainable high-efficiency formamide synthesis. Angew Chem Int Ed, 2025, 137 e202515803

[81] Yang W, Xiao L, Wu H, et al. . Photocatalytic formamide synthesis via coupling of electrophilic and nucleophilic radicals over atomically dispersed Bi sites. Angew Chem Int Ed, 2024, 63(39): e202408379

[82] Li X, Yang W, Yue J, et al. . Photocatalytic C‒N coupling from stable and transient intermediates for gram-scale acetamide synthesis. Nat Commun, 2025, 16(1): 3590

[83] Liu F, Liang Y, Zhao X, et al. . Photocatalytic formamide synthesis from plastic waste and ammonia via C–N bond construction under mild conditions. Angew Chem Int Ed, 2025, 137 e202513991

[84] Gao J, Wang J, Li D, et al. . Artificial photosynthesis of formamide via an oxidant-free photoinduced radical coupling route over Pt-CdS. Angew Chem Int Ed, 2025, 137(19): e202500747

[85] Lee MG, Li X-Y, Ozden A, et al. . Selective synthesis of butane from carbon monoxide using cascade electrolysis and thermocatalysis at ambient conditions. Nat Catal, 2023, 6: 310-318

[86] Luo Y, Xie K, Ou P, et al. . Selective electrochemical synthesis of urea from nitrate and CO₂ via relay catalysis on hybrid catalysts. Nat Catal, 2023, 6: 939-948

[87] Sisler J, Khan S, Ip AH, et al. . Ethylene electrosynthesis: a comparative techno-economic analysis of alkaline vs membrane electrode assembly vs CO₂–CO–C₂H₄ tandems. ACS Energy Lett, 2021, 6: 997-1002

[88] Shao J, Meng N, Wang Y, et al. . Scalable electrosynthesis of formamide through C−N coupling at the industrially relevant current density of 120 mA cm⁻². Angew Chem Int Ed, 2022, 134 e202213009

[89] Meng N, Ma X, Wang C, et al. . Oxide-derived core–shell Cu@Zn nanowires for urea electrosynthesis from carbon dioxide and nitrate in water. ACS Nano, 2022, 16: 9095-9104

[90] Nørskov JK, Abild-Pedersen F, Studt F, et al. . Density functional theory in surface chemistry and catalysis. Proc Natl Acad Sci U S A, 2011, 108: 937-943

[91] Chen H, Zhu C, Yue H, et al. . Carbon–germanium bond formation via low-valent cobalt-catalyzed cross-electrophile coupling. ACS Catal, 2023, 13: 6773-6780

[92] Mollabagher H, Mojtahedi MM, Mousavi SAHS. Recent progress of organosilicon compound: synthesis and applications. J Iran Chem Soc, 2024, 21: 1795-1816

[93] Paul S, Dutta A. Challenges and opportunities of lignocellulosic biomass for anaerobic digestion. Resour Conserv Recycl, 2018, 130: 164-174

[94] Liang G, Wang A, Li L, et al. . Production of primary amines by reductive amination of biomass-derived aldehydes/ketones. Angew Chem Int Ed, 2017, 56(11): 3050-3054

[95] Zheng M, Li Q, Liu M, et al. . Creation of Mo active sites on indium oxide microrods for photocatalytic amino acid production. Sci China Mater, 2021, 65: 1285-1293

[96] Song S, Qu J, Han P, et al. . Visible-light-driven amino acids production from biomass-based feedstocks over ultrathin CdS nanosheets. Nat Commun, 2020, 11(1): 4899

[97] Kumar P, Sharma K. Synthesis and photoluminescence spectra of CdS and CdS/ZnO doped PVK nanocomposite films. Mater Sci-Pol, 2018, 36: 354-358

[98] Wu X, Xie S, Liu C, et al. . Ligand-controlled photocatalysis of CdS quantum dots for lignin valorization under visible light. ACS Catal, 2019, 9: 8443-8451

[99] Xu H-Q, Yang S, Ma X, et al. . Unveiling charge-separation dynamics in CdS/Metal–organic framework composites for enhanced photocatalysis. ACS Catal, 2018, 8: 11615-11621

[100] Zhu N, Tang J, Tang C, et al. . Combined CdS nanoparticles-assisted photocatalysis and periphytic biological processes for nitrate removal. Chem Eng J, 2018, 353: 237-245

[101] Li W, Zheng X, Xu BB, et al. . Atomic ruthenium‐promoted cadmium sulfide for photocatalytic production of amino acids from biomass derivatives. Angew Chem Int Ed, 2024, 63(27): e202320014

[102] Abdouli I, Dappozze F, Eternot M, et al. . Hydrothermal process assisted by photocatalysis: towards a novel hybrid mechanism driven glucose valorization to levulinic acid, ethylene and hydrogen. Appl Catal B Environ, 2022, 305 121051

[103] Wang J, Zhao Q, Li Z, et al. . Selective photocatalytic glucaric acid production from TEMPO-mediated glucose oxidation on alkalized carbon nitride. Appl Catal B Environ, 2024, 360 124526

[104] Zhang P, Sun D, Cho A, et al. . Modified carbon nitride nanozyme as bifunctional glucose oxidase-peroxidase for metal-free bioinspired cascade photocatalysis. Nat Commun, 2019, 10 940

[105] Zhao H, Li C-F, Yu X, et al. . Mechanistic understanding of cellulose β-1,4-glycosidic cleavage via photocatalysis. Appl Catal B Environ, 2021, 302 120872

[106] Hao L, Ding M, Song S, et al. . 2D/2D CdS/1T-MoS₂ heterojunctions with abundant interfacial sulfur vacancies for high-efficient photocatalytic amino acid synthesis from bio-based feedstocks. Appl Catal B Environ, 2025, 374 125371

[107] Han YW, Ye L, Gong TJ, et al. . Surface-controlled CdS/Ti₃C₂ MXene schottky junction for highly selective and active photocatalytic dehydrogenation-reductive amination. Angew Chem Int Ed, 2023, 135(45): e202306305

[108] Zhang H, Sun Z, Hu YH. Steam reforming of methane: current states of catalyst design and process upgrading. Renew Sustain Energy Rev, 2021, 149 111330

[109] Niemeier J, Engel RV, Rose M. Is water a suitable solvent for the catalytic amination of alcohols?. Green Chem, 2017, 19: 2839-2845

[110] Li P, Zhao W, Wang K, et al. . Photocatalytic synthesis of glycine from methanol and nitrate. Angew Chem Int Ed, 2024, 63(48): e202405370

[111] Li P, Zhang B. Photocatalytic conversion of biomass and nitrate into glycine. ACS Catal, 2024, 14(24): 18345-18353

[112] Li P, Duan L, Lin Y, et al. . Modulating electron transfer via cerium photocatalysis for alkoxy radical-mediated selective hydroetherification. Angew Chem Int Ed, 2025, 137 e202501949

[113] Gong YN, Zhong DC, Lu TB. Porous supramolecular crystalline materials for photocatalysis. Angew Chem Int Ed, 2025, 137 e202424452

[114] Shi K, Meng H, Liu J, et al. . Synergistic contact‐electro‐catalysis and photocatalysis via TiO₂@PTFE composites for efficient N₂ to NH₃ conversion. Angew Chem Int Ed, 2025,

[115] Comer BM, Fuentes P, Dimkpa CO, et al. . Prospects and challenges for solar fertilizers. Joule, 2019, 3(7): 1578-1605

[116] Miao Y, Zhao Y, Gao J, et al. . Direct photoreforming of real-world polylactic acid plastics into highly selective value-added pyruvic acid under visible light. J Am Chem Soc, 2024, 146(7): 4842-4850

[117] Liu CX, Liu K, Xu Y, et al. . Photocatalytic upgrading of polylactic acid waste into alanine under mild conditions. Angew Chem Int Ed, 2024, 63(16): e202401255

[118] Wu Y, Nguyen PT, Wong SS, et al. . Photocatalytic upcycling of polylactic acid to alanine by sulfur vacancy-rich cadmium sulfide. Nat Commun, 2025, 16(1): 846

[119] Zhang Y, Fan T, Zhang X-G, et al. . Sulfur vacancy boosts light-driven C–N coupling in upcycling of polylactic acid to alanine. J Am Chem Soc, 2025, 147: 22589-22596

[120] Chang L, Xia Y. Excavating the potential of photo- and electroupcycling platforms toward a sustainable future for waste plastics. Small Science, 2023, 4 2300096

[121] Wang R-Z, Lin Z, Wang Y-Q, et al. . A direct polymeric carbon nitride/tungsten oxide Z-scheme heterostructure for efficient photocatalytic hydrogen generation via reforming of plastics into value-added chemicals. Rare Met, 2024, 43(8): 3771-3783

[122] Ya Z, Li M, Xu D, et al. . Asymmetric atomic Pt–B dual-site catalyst for efficient photoreforming of waste polylactic acid plastics in seawater. ACS Nano, 2025, 19(16): 16011-16023

[123] Mansoor S, Hu Z, Zhang Y, et al. . Simultaneous hydrogen production with photo reforming of lactic acid over MXene derived MoS₂/TiO₂/Ti₃C₂ nanowires. Chin J Catal, 2025, 71: 234-245

[124] Zhao B, Hu Z, Sun Y, et al. . Selective upcycling of polyolefins into high-value nitrogenated chemicals. J Am Chem Soc, 2024, 146(42): 28605-28611

[125] Zeng G, Su Y, Jiang J, et al. . Nitrogenative degradation of polystyrene waste. J Am Chem Soc, 2025, 147(3): 2737-2746

[126] Wang S-P, Cheung CW, Ma J-A. Direct amidation of carboxylic acids with nitroarenes. J Org Chem, 2019, 84(21): 13922-13934

[127] Pedrood K, Bahadorikhalili S, Lotfi V, et al. . Catalytic and non-catalytic amidation of carboxylic acid substrates. Mol Divers, 2021, 26(2): 1311-1344

[128] Liu H, Zhao L, Yuan Y, et al. . Potassium thioacids mediated selective amide and peptide constructions enabled by visible light photoredox catalysis. ACS Catal, 2016, 6(3): 1732-1736

[129] Cohen I, Mishra AK, Parvari G, et al. . Sunlight assisted direct amide formation via a charge-transfer complex. Chem Commun, 2017, 53(73): 10128-10131

[130] Srivastava V, Singh PK, Singh PP. Visible light photoredox catalysed amidation of carboxylic acids with amines. Tetrahedron Lett, 2019, 60(1): 40-43

[131] Bisoyi A, Simhadri VK, Surya K, et al. . Redox-neutral decarboxylative cross-coupling of oxamates with aryl bromides. ACS Organic Inorganic Au, 2023, 4(2): 223-228

[132] Gutierrez O, Tellis JC, Primer DN, et al. . Nickel-catalyzed cross-coupling of photoredox-generated radicals: uncovering a general manifold for stereoconvergence in nickel-catalyzed cross-couplings. J Am Chem Soc, 2015, 137(15): 4896-4899

[133] Liu C, Qin X, Yuan W, et al. . Direct photocatalytic reductive amidation of nitroarenes: a tandem reduction–decarboxylation approach to amide bond construction. Org Lett, 2025, 27(21): 5417-5422

[134] Nwosu U, Wang A, Palma B, et al. . Selective biomass photoreforming for valuable chemicals and fuels: a critical review. Renew Sust Energ Rev, 2021, 148 111266

[135] Davidson MG, Elgie S, Parsons S, et al. . Production of HMF, FDCA and their derived products: a review of life cycle assessment (LCA) and techno-economic analysis (TEA) studies. Green Chem, 2021, 23(9): 3154-3171

[136] Shi Q, Tang W, Kong K, et al. . Electrocatalytic upgrading of plastic and biomass-derived polyols to formamide under ambient conditions. Angew Chem Int Ed, 2024, 63(33): e202407580

[137] Lu X, Yao Z-C, Ma X, et al. . Multiple secondary bond-mediated C–N coupling over N-doped carbon electrocatalysts. J Am Chem Soc, 2025, 147(22): 19342-19352

[138] Mao C, Byun J, MacLeod HW, et al. . Green urea production for sustainable agriculture. Joule, 2024, 8(5): 1224-1238

[139] Hu B, Lu R, Wang W, et al. . Directing the C–N coupling pathway enables efficient urea electrosynthesis. J Am Chem Soc, 2025, 147: 21764-21777

[140] Shi Y, Zhang S, Diao X, et al. . Upcycling of waste polyester plastic to carboxylic acids and hydrogen by a Ru^δ+–Ru⁰ dual-site catalyst. ACS Catal, 2025, 15(15): 12640-12651

[141] Lee WH, Lee CW, Cha GD, et al. . Floatable photocatalytic hydrogel nanocomposites for large-scale solar hydrogen production. Nat Nanotechnol, 2023, 18(7): 754-762

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