化学还原法制备高分散纳米铂粒子

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Abstract The fuel cells are regarded as a promising candidates for new-generation of automobile power sources, due to their high energy density, conversion efficiency and low environmental pollution. Platinum carbon catalyst is the key material of fuel cell in new energy vehicle, while it has the disadvantages of high cost. In order to reduce the amount of platinum, nano-platinum is an important method to improve the catalytic utilization rate and lower the cost of the catalyst. The highly dispersed nano-platinum was prepared by a liquid phase reduction method and use H₂PtCl₆·6H₂O as a platinum precursor, NaBH₄ as reducing agent, polyvinyl pyrrolidone (PVP) as stabilizing agent in ethylene glycol solvent at 25 ℃ for reaction 60 min. The structure, morphology and particles size distribution (PSD) of nano-platinum were analyzed by UV-vis, XRD, TEM and XPS. The mechanism of reaction conditions on nano-platinum was preliminarily explored in preliminarily. The results showed that platinum particles with high dispersed, single morphology, uniform size and the average particle size of 7.53 nm could be prepared by using ethylene glycol as solvent and reducing agent. The nano-platinum of the surface has high Gibbs free energy, through the double effect of sterically hindered and electrostatic repulsion with PVP can be effectively inhibited the nano-platinum aggregation.

Key words： fuel cell platinum nanoparticle chemical reduction ethylene glycol NaBH₄

Published: 16 July 2021

CLC number:

TB321

About author:: Guoyu Wu obtained he Ph.D. degree form Central South University in 2019. He is a postdoctor in China Gold Group Co.LTD. Dr Wu's research interest is now focused on preparation and performance application of metallurgical materials, simulation and optimization of metallurgical process and fuel cells. He has achieved a number of innovative results and published more than 10 journal papers and patents.Ye Zheng obtained his Ph.D degree from Northeastern University. He is currently a professor of senior engineer and the leader of Changchun Gold Research Institute Co.,LTD.. In 2014, he was selected as the“Young and Middle-aged Scientific and Technological Innovation Leading Talents” by the Ministry of Science and Technology and in 2016, he was selected as the National “Ten Thousand Talents Program”. He focuses on research and development of mineral processing and new energy materials. He has published more than 40 journal papers and 30 patents. Mingyong Wang obtained his Ph.D degree from Institution of Process Engineering, Chinese Academy of Science in 2011. He is currently a professor in State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing. He is a member of Youth Innovation Promotion Association of Chinese Academy of Sciences. He focuses onelectro-chemical metallurgy and product application and has presided over 4 projects of National Natural Science Foundation of China and more than 10 projects of other countries and enterprises. He has published more than 100 research paper in journals such as Energy Environ. Sci., Adv. Energy Mater., J. Clean Prod., Metal. Mater. Trans. B, et al.Zhijun Xing obtained his Master degree from Central South University. He is currently a senior engineer and the director of Precious Metal Materials and Applications Institute of Changchun Gold Research Institute Co.,LTD.. He focuses on research of gold and precious metal metallurgy and materials. He won the each one provincial and ministerial level of first and second prize. He has published more than 20 journal papers and 10 patents.

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Cite this article:

WU Guoyu,ZHENG Ye,WANG Mingyong, et al. Preparation of Highly Dispersed Nano-platinum by Chemical Reduction[J]. Materials Reports, 2021, 35(Z1): 406-410.

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http://www.mater-rep.com/EN/ OR http://www.mater-rep.com/EN/Y2021/V35/IZ1/406

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