Chinese Journal of Catalysis ›› 2022, Vol. 43 ›› Issue (1): 47-58.DOI: 10.1016/S1872-2067(21)63896-2

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Structural evolution of Pt-based oxygen reduction reaction electrocatalysts

Jiaheng Penga, Peng Taoa, Chengyi Songa, Wen Shanga, Tao Denga,b, Jianbo Wua,b,c,d,*()   

  1. aState Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
    bCenter of Hydrogen Science, Shanghai Jiao Tong University, Shanghai 200240, China
    cMaterials Genome Initiative Center, Shanghai Jiao Tong University, Shanghai 200240, China
    dFuture Material Innovation Center, Zhangjiang Institute for Advanced Study, Shanghai Jiao Tong University, Shanghai 200240, China
  • Received:2021-05-30 Accepted:2021-06-15 Online:2022-01-18 Published:2021-11-15
  • Contact: Jianbo Wu
  • About author:* Tel/Fax: +86-21-54745582; E-mail: jianbowu@sjtu.edu.cn
  • Supported by:
    National Key R&D Program of China(2017YFB0406000);National Natural Science Foundation of China(21875137);National Natural Science Foundation of China(51521004);National Natural Science Foundation of China(51420105009);111 Project(B16032);Innovation Program of Shanghai Municipal Education Commission(2019-01-07-00-02-E00069);fund from Center of Hydrogen Science and Joint Research Center for Clean Energy Materials

Abstract:

The commercialization of proton exchange membrane fuel cells (PEMFCs) could provide a cleaner energy society in the near future. However, the sluggish reaction kinetics and harsh conditions of the oxygen reduction reaction affect the durability and cost of PEMFCs. Most previous reports on Pt-based electrocatalyst designs have focused more on improving their activity; however, with the commercialization of PEMFCs, durability has received increasing attention. In-depth insight into the structural evolution of Pt-based electrocatalysts throughout their lifecycle can contribute to further optimization of their activity and durability. The development of in situ electron microscopy and other in situ techniques has promoted the elucidation of the evolution mechanism. This mini review highlights recent advances in the structural evolution of Pt-based electrocatalysts. The mechanisms are adequately discussed, and some methods to inhibit or exploit the structural evolution of the catalysts are also briefly reviewed.

Key words: Oxygen reduction reaction, Structural evolution, Pt-based electrocatalyst, Durability, In situ electron microscopy, characterizations