Morphological Control of PtCu₂ Octahedron and Oxygen Reduction Electrocatalytic Performance of PtCu for Fuel Cell

Authors

Long-sheng CAO, Fuel Cell System and Engineering Group, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;University of Chinese Academy of Sciences, Beijing 100049, China;
Lei WAN, Department of Chemcial Engineering, Tsinghua University, Beijing 100084, China;
Zhi-gang SHAO, Fuel Cell System and Engineering Group, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;Follow
Hong-mei YU, Fuel Cell System and Engineering Group, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;
Ming HOU, Fuel Cell System and Engineering Group, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;
Bao-lian YI, Fuel Cell System and Engineering Group, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;

Corresponding Author

Zhi-gang SHAO(zhgshao@dicp.ac.cn)

Abstract

Platinum acetylacetonate (Pt(acac)₂) and copper acetylacetonate (Cu(acac)₂) were co-reduced to prepare PtCu₂ octahedron alloy catalyst in N,N-dimethylformamiade by solvothermal method. The PtCu₂ showed lattice compression, and high ratio of non-oxidized Pt with high electronic binding energy. All those structural features contributed to weak adsorption strength of oxygen species on Pt and lower d-band centre position. The influence of structure-directing agent on morphology of PtCu alloy was systematically studied. In the half cell test, as a result of the uniform morphology and regular octahedron of PtCu₂ formed, the mass activity and area specific activity of PtCu₂/C reached 6.2 and 27.2 times, respectively, relative to those of Pt/C at 0.9 V vs. RHE. Furthermore, after the accelarated degradation test, the mass activity of PtCu2/C still reached 4.5 times compared to that of Pt/C.

Graphical Abstract

Keywords

fuel cells, oxygen reduction, PtCu, octahedron

DOI Link

https://doi.org/10.13208/j.electrochem.180848

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Publication Date

2018-12-28

Online Available Date

2018-11-30

Revised Date

2018-10-08

Received Date

2018-09-17

Recommended Citation

Long-sheng CAO, Lei WAN, Zhi-gang SHAO, Hong-mei YU, Ming HOU, Bao-lian YI. Morphological Control of PtCu₂ Octahedron and Oxygen Reduction Electrocatalytic Performance of PtCu for Fuel Cell[J]. Journal of Electrochemistry, 2018 , 24(6): 697-706.
DOI: 10.13208/j.electrochem.180848
Available at: https://jelectrochem.xmu.edu.cn/journal/vol24/iss6/11