Study on the preparation of Pt nanocapsules

Abstract

Ag@Pt core-shell nanoparticles (Ag@Pt NPs) were prepared by a co-reduction method. Pt nanocapsules with diameters of less than 10 nm were obtained by an electrochemical method. Cyclic voltammetry (CV) scanning was used to cavitate the Ag@Pt NPs, and the morphology, structure, and cavitation conditions were studied. The results indicate that the effective cavitation conditions to obtain Pt nanoparticles from Ag@Pt NPs are a scanning voltage of 0 to 0.8 V and continuous CV scanning over 2 h. This cavitation method is also applicable for the syntheses of Ir, Ru, and Ru–Pt nanocapsules.

Keywords

platinum / nanocapsules / cavitation / preparation methods

References

[1] Wang X., Chen H., Zheng Y., Ma M., Chen Y., Zhang K., Zeng D., Shi J. Au-nanoparticle coated mesoporous silica nanocapsule-based multifunctional platform for ultrasound mediated imaging, cytoclasis and tumor ablation. Biomaterials, 2013, 34(8): 2057.

[2] Wu C.Y., Wu P.W., Lin P., Li Y.Y., Lin Y.M. Silver-carbon nanocapsule electrocatalyst for oxygen reduction reaction. J. Electrochem. Soc., 2007, 154(10): B1059.

[3] Duan M.Y., Liang R., Tian N., Li Y.J., Yeung E.S. Self-assembly of Au–Pt core–shell nanoparticles for effective enhancement of methanol electrooxidation. Electrochim. Acta, 2013, 87, 432.

[4] Jia Z.Z., Wang Z.B., Qu W.L., Rivera H., Gu D.M., Ying G.P. Carbon-riveted Pt catalyst supported on nanocapsule MWCN Ts–Al₂O₃ with ultrahigh stability for high-temperature proton exchange membrane fuel cells. Nanoscale, 2012, 4(23): 7411.

[5] Zhang L., Shao H.P., Zheng H., Lin T., Guo Z.M. Synthesis and characterization of Fe₃O₄@SiO₂ magnetic composite nanoparticles by a one-pot process. Int. J. Miner. Metall. Mater., 2016, 23(9): 1112.

[6] Bakhshi H., Shokuhfar A., Vahdati N. Synthesis and characterization of carbon-coated cobalt ferrite nanoparticles. Int. J. Miner. Metall. Mater., 2016, 23(9): 1104.

[7] Guo S.J., Dong S.J., Wang E.K. Raspberry-like hierarchical Au/Pt nanoparticle assembling hollow spheres with nanochannels: an advanced nanoelectrocatalyst for the oxygen reduction reaction. J. Phys. Chem. C, 2009, 113(14): 5485.

[8] Zhao J., Chen W.X., Zheng Y.F., Li X. Novel carbon supported hollow Pt nanospheres for methanol electrooxidation. J. Power Sources, 2006, 163(1): 168.

[9] Chen Z., Waje M., Li W., Yan Y. Supportless Pt and PtPd nanotubes as electrocatalysts for oxygen-reduction reactions. Angew. Chem., 2007, 46(22): 4138.

[10] Couvreur P., Barratt G., Fattal E., Legrand P., Vauthier C. Nanocapsule technology: a review. Crit. Rev. Ther. Drug. Carrier Syst., 2002, 19(2): 99.

[11] Sharifimefr M.R., Ghanbari K., Ayoubi K., Mohajerani E. Preparation and spectral characterization of polymeric nanocapsules containing DR1 organic dye. Opt. Mater., 2015, 45, 87.

[12] Cui C.Y., Liu X.G., Wu N.D., Sun Y.P. Facile synthesis of core/shell-structured Sn/onion-like carbon nanocapsules as high-performance anode material for lithium-ion batteries. Mater. Lett., 2015, 143, 35.

[13] Liu X.G., Wu N.D., Cui C.Y., Li Y.T., Zhou P.P., Bi N.N. Facile preparation of carbon-coated Mg nanocapsules as light microwave absorber. Mater. Lett., 2015, 149, 12.

[14] Liu X.G., Cui C.Y., Wu N.D., Or S.W., Bi N.N. Core/shell-structured nickel cobaltite/onion-like carbon nanocapsules as improved anode material for lithium-ion batteries. Ceram. Int., 2015, 41(6): 7511.

[15] Wu N.D., Liu X.G., Zhao C.Y., Cui C.Y., Xia A.L. Effects of particle size on the magnetic and microwave absorption properties of carbon-coated nickel nanocapsules. J. Alloys Compd., 2016, 656, 628.