Morphology and Activity Tuning of Cu3Pt/C Ordered Intermetallic Nanoparticles by Selective Electrochemical Dealloying

被引:139
作者
Wang, Deli [1 ]
Yu, Yingchao [2 ]
Zhu, Jing [1 ]
Liu, Sufen [1 ]
Muller, David A. [3 ,4 ]
Abruna, Hector D. [2 ]
机构
[1] Huazhong Univ Sci & Technol, Sch Chem & Chem Engn, Minist Educ, Key Lab Large Format Battery Mat & Syst, Wuhan 430074, Peoples R China
[2] Cornell Univ, Dept Chem & Chem Biol, Ithaca, NY 14853 USA
[3] Cornell Univ, Dept Appl & Engn Phys, Ithaca, NY 14853 USA
[4] Cornell Univ, Kavli Inst Nanoscale Sci, Ithaca, NY 14853 USA
基金
美国国家科学基金会;
关键词
Fuel cells; oxygen reduction reaction; electrocatalyst; ordered intermetallic; dealloying; OXYGEN REDUCTION REACTION; FUEL-CELL CATALYSTS; HOLLOW NANOCRYSTALS; ELECTRON-MICROSCOPY; SHAPE; ELECTROCATALYSIS; SURFACES; CO; NANOCATALYSTS; NANOPOROSITY;
D O I
10.1021/nl504597j
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Improving the catalytic activity of Pt-based bimetallic nanoparticles is a key challenge in the application of proton-exchange membrane fuel cells. Electrochemical dealloying represents a powerful approach for tuning the surface structure and morphology of these catalyst nanoparticles. We present a comprehensive study of using electrochemical dealloying methods to control the morphology of ordered Cu3Pt/C intermetallic nanoparticles, which could dramatically affect their electrocatalytic activity for the oxygen reduction reaction (ORR). Depending on the electrochemical dealloying conditions, the nanoparticles with Pt-rich coreshell or porous structures were formed. We further demonstrate that the coreshell and porous morphologies can be combined to achieve the highest ORR activity. This strategy provides new guidelines for optimizing nanoparticles synthesis and improving electrocatalytic activity.
引用
收藏
页码:1343 / 1348
页数:6
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