Ye Pengcheng, Fang Keqing, Wang Haiyan, Wang Yahao, Huang Hao, Mo Chenbin, Ning Jiqiang, Hu Yong
Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, Jinhua, 321004, China.
Department of Microsystems, University of South-Eastern Norway, Borre, 3184, Norway.
Nat Commun. 2024 Feb 3;15(1):1012. doi: 10.1038/s41467-024-45320-0.
Oxygen evolution reaction (OER) is critical to renewable energy conversion technologies, but the structure-activity relationships and underlying catalytic mechanisms in catalysts are not fully understood. We herein demonstrate a strategy to promote OER with simultaneously achieved lattice oxygen activation and enhanced local electric field by dual doping of cations and anions. Rough arrays of Fe and F co-doped CoO nanoneedles are constructed, and a low overpotential of 277 mV at 500 mA cm is achieved. The dually doped Fe and F could cooperatively tailor the electronic properties of CoO, leading to improved metal-oxygen covalency and stimulated lattice oxygen activation. Particularly, Fe doping induces a synergetic effect of tip enhancement and proximity effect, which effectively concentrates OH ions, optimizes reaction energy barrier and promotes O desorption. This work demonstrates a conceptual strategy to couple lattice oxygen and local electric field for effective electrocatalytic water oxidation.
析氧反应（OER）对于可再生能源转换技术至关重要，但催化剂中的结构-活性关系及潜在催化机制尚未完全明晰。在此，我们展示了一种通过阳离子和阴离子双掺杂同时实现晶格氧活化和增强局部电场来促进析氧反应的策略。构建了铁和氟共掺杂的CoO纳米针粗糙阵列，在500 mA cm时实现了277 mV的低过电位。双掺杂的铁和氟协同调节CoO的电子性质，导致金属-氧共价性改善并激发晶格氧活化。特别地，铁掺杂诱导了尖端增强和邻近效应的协同作用，有效富集OH离子，优化反应能垒并促进O脱附。这项工作展示了一种将晶格氧和局部电场耦合以实现有效电催化水氧化的概念性策略。
