Chinese Journal of Catalysis ›› 2022, Vol. 43 ›› Issue (6): 1433-1443.DOI: 10.1016/S1872-2067(21)63961-X

• Review • Previous Articles     Next Articles

Oxygen reduction reaction on Pt-based electrocatalysts: Four-electron vs. two-electron pathway

Lili Zhang, Suyu Jiang, Wei Ma#(), Zhen Zhou*()   

  1. Engineering Research Center of Advanced Functional Material Manufacturing of Ministry of Education, School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, Henan, China
  • Received:2021-09-25 Accepted:2021-09-25 Online:2022-06-18 Published:2022-04-14
  • Contact: Wei Ma, Zhen Zhou
  • Supported by:
    National Natural Science Foundation of China(51702291);National Science Foundation for Postdoctoral Scientists of China(2020TQ0278);National Science Foundation for Postdoctoral Scientists of China(2020M672282)

Abstract:

Oxygen reduction reaction (ORR) has attracted extensive attention as an important component for sustainable energy storage and conversion technologies. However, the sluggish kinetics has hampered the practical application. Pt-based nanomaterials have triggered much interest as the most promising electrocatalyst to facilitate the kinetics of ORR. Nonetheless, a major challenge for Pt-based electrocatalysts is to precisely control the selectivity of reaction pathways and possible products (H2O or H2O2) with a reduced loading amount of precious Pt. This review systematically summarizes the strategies to regulate the ORR performances of Pt-based electrocatalysts by accommodating the adsorption energy and spatial structure. Further discussion is implemented about the key factors to accelerate the kinetics of ORR and control the 4e-ORR and 2e-ORR pathways. Finally, we demonstrate the challenges and perspectives for further development of novel Pt-based electrocatalysts.

Key words: Oxygen reduction reaction, Electrocatalysts, Platinum, Selectivity, Hydrogen peroxide