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Updated: Jun 3, 2025
Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance
Published on: April 27, 2018
Oxygen reduction reaction kinetics of platinum-based catalysts under stress induction
Haibo Jiang1, Jiyuan Lu1, Liyuan Bi1
1Shanghai Engineering Research Center of Hierarchical Nanomaterials, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science & Technology, Shanghai 200237, China. jianhuashen@ecust.edu.cn.
Abstract:
The ORR kinetic optimization for PtNi and PtPb catalysts is conferred by stress induction. First principles calculation shows the cleavage barrier reduction of the key intermediate *OOH to 28.48 and 0 kJ mol-1, respectively. Proper kinetic tuning led to a mass activity promotion of PtNi to 3.57 times that of Pt/C, whereas excessive modulation induced activity degradation for PtPb and shifted the rate-determining step to the first electron transfer, which was verified by in situ infrared spectroscopy and electrochemical characterization.
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