Implanting oxophilic metal in PtRu nanowires for hydrogen oxidation catalysis

Zhongliang Huang, Shengnan Hu, Mingzi Sun, Yong Xu (), Shangheng Liu, Renjie Ren, Lin Zhuang, Ting-Shan Chan, Zhiwei Hu, Tianyi Ding, Jing Zhou, Liangbin Liu, Mingmin Wang, Yu-Cheng Huang, Na Tian, Lingzheng Bu (), Bolong Huang () and Xiaoqing Huang ()
Additional contact information
Zhongliang Huang: Xiamen University
Shengnan Hu: Xiamen University
Mingzi Sun: The Hong Kong Polytechnic University, Hung Hom, Kowloon
Yong Xu: Chinese Academy of Sciences (CAS)
Shangheng Liu: Xiamen University
Renjie Ren: Wuhan University
Lin Zhuang: Wuhan University
Ting-Shan Chan: National Synchrotron Radiation Research Center
Zhiwei Hu: Max Planck Institute for Chemical Physics of Solids
Tianyi Ding: Xiamen University
Jing Zhou: Chinese Academy of Sciences
Liangbin Liu: Xiamen University
Mingmin Wang: Xiamen University
Yu-Cheng Huang: National Yang Ming Chiao Tung University
Na Tian: Xiamen University
Lingzheng Bu: Xiamen University
Bolong Huang: The Hong Kong Polytechnic University, Hung Hom, Kowloon
Xiaoqing Huang: Xiamen University

Nature Communications, 2024, vol. 15, issue 1, 1-11

Abstract: Abstract Bimetallic PtRu are promising electrocatalysts for hydrogen oxidation reaction in anion exchange membrane fuel cell, where the activity and stability are still unsatisfying. Here, PtRu nanowires were implanted with a series of oxophilic metal atoms (named as i-M-PR), significantly enhancing alkaline hydrogen oxidation reaction (HOR) activity and stability. With the dual doping of In and Zn atoms, the i-ZnIn-PR/C shows mass activity of 10.2 A mgPt+Ru−1 at 50 mV, largely surpassing that of commercial Pt/C (0.27 A mgPt−1) and PtRu/C (1.24 A mgPt+Ru−1). More importantly, the peak power density and specific power density are as high as 1.84 W cm−2 and 18.4 W mgPt+Ru−1 with a low loading (0.1 mg cm−2) anion exchange membrane fuel cell. Advanced experimental characterizations and theoretical calculations collectively suggest that dual doping with In and Zn atoms optimizes the binding strengths of intermediates and promotes CO oxidation, enhancing the HOR performances. This work deepens the understanding of developing novel alloy catalysts, which will attract immediate interest in materials, chemistry, energy and beyond.

Date: 2024
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DOI: 10.1038/s41467-024-45369-x

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