Abstract
Developing productive and stable catalysts using common elements for the production of hydrogen via water splitting is highly desirable. Due to their well-designed composition, unique morphology, and highly crystalline structure, metal–organic frameworks (MOFs) exhibit good electrocatalytic performance and have attracted significant research interest as OER catalysts. The optimized Co-MOF-C catalyst reported herein exhibited a smaller overpotential at 10 mA cm−2 and Tafel slope (342 mV, 119 mV dec−1) than Co-MOF-A and Co-MOF-B in an alkaline solution for OER. Moreover, Co-MOF-C showed better long-term durability and stability with negligible deactivation compared with the other MOF catalysts. The apparent laminar nanomorphology of Co-MOF-C provided more accessible active metal centers, better electrical conductivity, and improved kinetics, explaining its better performance as an OER electrocatalyst.
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