文献类型：期刊文献

英文题名：Enhanced Acidic Oxygen Evolution Reaction Performance by Anchoring Iridium Oxide Nanoparticles on Co3O4

作者：Tao, Gege[1]; Wang, Zhiqiang[1,2]; Liu, Xiaohui[1]; Wang, Yanqin[1]; Guo, Yong[1,3]

机构：[1] State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, China; [2] Key Laboratory for Advanced Materials, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, China; [3] School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, 832003, China

年份：2025

卷号：17

期号：1

起止页码：1350

外文期刊名：ACS Applied Materials and Interfaces

收录：EI(收录号：20245117561915)

语种：英文

外文关键词：Benchmarking - Bioremediation - Design for testability - Iridium compounds - Oxygen evolution reaction - Photodissociation - Photoionization - Rate constants

摘要：The sluggish kinetics of the anodic process, known as the oxygen evolution reaction (OER), has posed a significant challenge for the practical application of proton exchange membrane water electrolyzers in industrial settings. This study introduces a high-performance OER catalyst by anchoring iridium oxide nanoparticles (IrO2) onto a cobalt oxide (Co3O4) substrate via a two-step combustion method. The resulting IrO2@Co3O4 catalyst demonstrates a significant enhancement in both catalytic activity and stability in acidic environments. Notably, the overpotential required to attain a current density of 10 mA cm-2, a commonly used benchmark for comparison, is merely 301 mV. Furthermore, stability is maintained over a duration of 80 h, as confirmed by the minimal rise in overpotential. Energy spectrum characterizations and experimental results reveal that the generation of OER-active Ir3+ species on the IrO2@Co3O4 surface is induced by the strong interaction between IrO2 and Co3O4. Theoretical calculations further indicate that IrO2 sites loaded onto Co3O4 have a lower energy barrier for *OOH deprotonation to form desorbed O2. Moreover, this interaction also stabilizes the iridium active sites by maintaining their chemical state, leading to superior long-term stability. These insights could significantly impact the strategies for designing and synthesizing more efficient OER electrocatalysts for broader industrial application. ? 2024 American Chemical Society.