文献类型：期刊文献

英文题名：Facial fabrication of yolk-shell Pd-Ni-P alloy with mesoporous structure as an advanced catalyst for methanol electro-oxidation

作者：Kang, Zinan[1];Zhao, Ming[1];Wu, Yanfang[1];Xia, Tian[1];Cao, Jing-Pei[1];Cai, Weiwei[2];Chen, Luyang[3]

机构：[1]China Univ Min & Technol, Key Lab Coal Proc & Efficient Utilizat, Minist Educ, Xuzhou 221116, Jiangsu, Peoples R China;[2]China Univ Geosci Wuhan, Fac Mat Sci & Chem, Sustainable Energy Lab, Wuhan 430074, Hubei, Peoples R China;[3]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Minist Educ, Shanghai 200237, Peoples R China

年份：2019

卷号：484

起止页码：441

外文期刊名：APPLIED SURFACE SCIENCE

收录：;EI(收录号：20191606802587);WOS:【SCI-EXPANDED(收录号:WOS:000471830700049)】；

基金：This work was supported by the Natural Science Foundation of Jiangsu Province (Grant BK20160254); the National Natural Science Foundation of China (51502092); and the Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning (TP2015028).

语种：英文

外文关键词：Metal phosphide; Palladium; Nanoporous metal; Yolk-shell structure; Electro-catalysis

摘要：High activity and long-term stability are necessary for the electro-catalysts to be used in fuel cells. Herein, we report the facile fabrication of a yolk-shell Pd-Ni-P alloy based on the thermal ripening of aggregated nanoparticles. The material has abundant nanopores in both the core and the shell parts. Size distribution analysis based on density functional theory shows the width of the nanopores is around 15 nm. Based on the electrochemical active area of palladium, the supported yolk-shell Pd-Ni-P catalyst affords a high electro-catalytic activity (1.9 mA cm(-2) (Pd)) in methanol oxidation reaction which is 1.5, 3.1, 3.8, or 5.5 times higher than those of face-centered cubic Pd-Ni-P, amorphous Pd-Ni-P, Pd-Ni, or Pd nanoparticles, respectively. Impressively, 87% of the current density remains after 2000 cycles' cyclic voltammetry with yolk-shell catalyst as the anode, which is much superior to those values with other related Pd-based nanoparticles.