<p>The development of robust, budget-friendly, and efficient electrocatalysts for the oxygen evolution reaction (OER) is pivotal to reduce the energy barrier of alkaline water electrolysis, an expected technology for sustainable hydrogen production. Co<sub>3</sub>O<sub>4</sub> has emerged as a potential candidate for OER because of its strong oxophilicity, high intrinsic activity, and chemical stability. This review outlines prevailing OER mechanisms, including the adsorbate evolution and lattice oxygen mechanisms. Strategies for the formation of key structures involving Co<sub>3</sub>O<sub>4</sub>-based unique morphological structures, Co<sub>3</sub>O<sub>4</sub>-based heterostructures, Co<sub>3</sub>O<sub>4</sub>-based hetero-atom doped-structures, Co<sub>3</sub>O<sub>4</sub>-based defective structures, and Co<sub>3</sub>O<sub>4</sub>-based composites are systematically reviewed for accelerating oxygen-evolving electrolysis. Finally, difficulties in using Co<sub>3</sub>O<sub>4</sub>-based OER catalysts and the corresponding solutions are provided. This study set out to review in detail the available information on Co<sub>3</sub>O<sub>4</sub>-based OER electrocatalysts, driving the development of related transition metal oxide catalysts.</p>

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Recent Progress and Perspectives of Co3O4-Based Electrocatalysts for Oxygen Evolution Reaction

  • Ha Huu Do

摘要

The development of robust, budget-friendly, and efficient electrocatalysts for the oxygen evolution reaction (OER) is pivotal to reduce the energy barrier of alkaline water electrolysis, an expected technology for sustainable hydrogen production. Co3O4 has emerged as a potential candidate for OER because of its strong oxophilicity, high intrinsic activity, and chemical stability. This review outlines prevailing OER mechanisms, including the adsorbate evolution and lattice oxygen mechanisms. Strategies for the formation of key structures involving Co3O4-based unique morphological structures, Co3O4-based heterostructures, Co3O4-based hetero-atom doped-structures, Co3O4-based defective structures, and Co3O4-based composites are systematically reviewed for accelerating oxygen-evolving electrolysis. Finally, difficulties in using Co3O4-based OER catalysts and the corresponding solutions are provided. This study set out to review in detail the available information on Co3O4-based OER electrocatalysts, driving the development of related transition metal oxide catalysts.