纳米针
过电位
兴奋剂
催化作用
电场
氧气
材料科学
析氧
化学工程
纳米技术
化学物理
化学
光电子学
电极
电化学
物理
物理化学
纳米结构
工程类
量子力学
有机化学
生物化学
作者
Pengcheng Ye,K. Fang,Haiyan Wang,Yahao Wang,Hao Huang,C. C. Mo,Jiqiang Ning,Yong Hu
标识
DOI:10.1038/s41467-024-45320-0
摘要
Abstract 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 −2 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 2 desorption. This work demonstrates a conceptual strategy to couple lattice oxygen and local electric field for effective electrocatalytic water oxidation.
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