Catalytic Activities of Electrochemically Dealloyed Pt(Pd)-Cu Catalysts for Oxygen Reduction Reaction

Authors

Rui-Zhi YANG, Stanford Synchrotron Radiation Light Source, SLAC National Accelerator Laboratory, California 94025, USA;
Strasser Peter, epartment of Chemistry, Chemical Engineering Division, Technical University Berlin, Berlin 10623, Germany
Toney Michael, Stanford Synchrotron Radiation Light Source, SLAC National Accelerator Laboratory, California 94025, USA;

Corresponding Author

Rui-Zhi YANG(yangrz@suda.edu.cn)

Abstract

The electrochemically dealloyed Pt(Pd)-Cu catalysts were prepared by electrochemical dealloying of Cu3Pt(Pd) and their catalytic activities toward oxygen reduction reaction (ORR) were studied in 0.1 mol?L-1 HClO4 . solutions. The structural features of the dealloyed Pt(Pd)-Cu were revealed by synchrotron-based anomalous X-ray diffraction (AXRD) and surface X-ray scattering (SXS) at an atomic scale. We established a relationship between the structure and the catalytic activity by comparing the ORR activity and the structure of dealloyed Cu3Pt nanoparticles with similarly dealloyed Cu3Pt thin films and Cu3Pt(111). The enhancement in the activity of the dealloyed Pt(Pd)-Cu is mainly attributed to the strain change in the Pt(Pd) overlayer formed on the surface after dealloying. The strain is related to the thickness of Pt(Pd) overlayer, which is affected by the size of the material and the diffusion coefficient of the constituent element. The catalytic activity for ORR can be tuned by the strain in the surface layer of a catalyst.

Graphical Abstract

Keywords

oxygen reduction reaction, electrochemical dealloying, Pt(Pd)-Cu alloy, electrocatalyst

DOI Link

https://doi.org/10.61558/2993-074X.2895

Publication Date

2012-04-28

Online Available Date

2012-01-19

Revised Date

2012-01-09

Received Date

2011-11-24

Recommended Citation

Rui-Zhi YANG, Strasser Peter, Toney Michael. Catalytic Activities of Electrochemically Dealloyed Pt(Pd)-Cu Catalysts for Oxygen Reduction Reaction[J]. Journal of Electrochemistry, 2012 , 18(2): Article 9.
DOI: 10.61558/2993-074X.2895
Available at: https://jelectrochem.xmu.edu.cn/journal/vol18/iss2/9