Kuang Shaofu, Li Xinwei, Wang Jianxing, Lin Hua, Nie Ming, Sun Junhui, Zhang Honglin, Li Qing
Chongqing Key Laboratory for Advanced Materials and Technologies of Clean Energies, School of Materials and Energy, Southwest University, Chongqing 400715, China.
Tribology Research Institute, State Key Laboratory of Traction Power, School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, China.
ACS Appl Mater Interfaces. 2025 Jul 16;17(28):40564-40573. doi: 10.1021/acsami.5c09062. Epub 2025 Jun 27.
The activation of lattice oxygen to participate in the oxygen evolution reaction (OER), thereby bypassing the theoretical limitations of the traditional adsorption evolution mechanism, represents a promising approach to enhancing the OER kinetics. However, there exists an inherent contradiction between the OER activity and stability of such catalysts due to the element overflow caused by the formation of oxygen vacancies during the OER. Herein, we present a compatibility strategy aimed at simultaneously enhancing activity and stability by incorporating catalytically inactive Zn into FeCoNiCu layered hydroxide (LDH). Results show that the introduction of Zn not only activates additional lattice oxygen to participate in the OER but also improves the adsorption of OH to timely fill the oxygen vacancy and inhibits element overflow and thus improves the catalyst stability throughout the process. Benefiting from this rapid self-repairing strategy, FeCoNiCuZn LDH can operate stably over 200 h in 1.0 M KOH with only 254 mV overpotential at 100 mA cm. This study provides an alternative idea for designing catalysts with both high activity and excellent stability.
晶格氧的活化参与析氧反应（OER），从而绕过传统吸附-析氧机制的理论限制，是一种增强OER动力学的有前景的方法。然而，由于在OER过程中氧空位的形成导致元素溢流，这类催化剂的OER活性和稳定性之间存在内在矛盾。在此，我们提出一种兼容性策略，通过将催化惰性的Zn引入FeCoNiCu层状氢氧化物（LDH）中，旨在同时提高活性和稳定性。结果表明，Zn的引入不仅激活了额外的晶格氧参与OER，还改善了OH的吸附以及时填补氧空位，抑制元素溢流，从而在整个过程中提高了催化剂的稳定性。受益于这种快速自我修复策略，FeCoNiCuZn LDH在1.0 M KOH中可稳定运行超过200小时，在100 mA cm²时过电位仅为254 mV。本研究为设计具有高活性和优异稳定性的催化剂提供了一种新思路。
