• 文献标题:   Mesoporous Surface-Sulfurized Fe-Co3O4 Nanosheets Integrated with N/S Co-Doped Graphene as a Robust Bifunctional Electrocatalyst for Oxygen Evolution and Reduction Reactions
  • 文献类型:   Article
  • 作  者:   MENG LX, WANG YG, LIU WW, FAN CL, NAN HX, WANG J, YU J
  • 作者关键词:   ironcobalt bimetallic oxide, surface vulcanisation, n, s codoped graphene, oxygen evolution reaction, oxygen reduction reaction, bifunctional electrocatalyst
  • 出版物名称:   MOLECULES
  • ISSN:  
  • 通讯作者地址:  
  • 被引频次:   0
  • DOI:   10.3390/molecules28052221
  • 出版年:   2023

▎ 摘  要

Playing a significant role in electrochemical energy conversion and storage systems, heteroatom-doped transition metal oxides are key materials for oxygen-involving reactions. Herein, mesoporous surface-sulfurized Fe-Co3O4 nanosheets integrated with N/S co-doped graphene (Fe-Co3O4-S/NSG) were designed as composite bifunctional electrocatalysts for the oxygen evolution reaction (OER) and the oxygen reduction reaction (ORR). Compared with the Co3O4-S/NSG catalyst, it exhibited superior activity in the alkaline electrolytes by delivering an OER overpotential of 289 mV at 10 mA cm(-2) and an ORR half-wave potential of 0.77 V vs. RHE. Additionally, Fe-Co3O4-S/NSG kept stable at 4.2 mA cm(-2) for 12 h without significant attenuation to render robust durability. This work not only demonstrates the satisfactory effect of the transition-metal cationic modification represented by iron doping on the electrocatalytic performance of Co3O4, but it also provides a new insight on the design of OER/ORR bifunctional electrocatalysts for efficient energy conversion.