塔菲尔方程
过电位
析氧
催化作用
掺杂剂
碳化
材料科学
X射线光电子能谱
纳米技术
化学
化学工程
兴奋剂
物理化学
电化学
电极
有机化学
复合材料
扫描电子显微镜
工程类
光电子学
作者
Yafei Zhao,Xingwen Lu,Guilan Fan,Deyan Luan,Xiaojun Gu,Xiong-Wen Lou
标识
DOI:10.1002/anie.202212542
摘要
Trapping the active sites on the exterior surface of hollow supports can reduce mass transfer resistance and enhance atomic utilization. Herein, we report a facile chemical vapor deposition strategy to synthesize single-Ni atoms decorated hollow S/N-doped football-like carbon spheres (Ni SAs@S/N-FCS). Specifically, the CdS@3-aminophenol/formaldehyde is carbonized into S/N-FCS. The gas-migrated Ni species are anchored on the surface of S/N-FCS simultaneously, yielding Ni SAs@S/N-FCS. The obtained catalyst exhibits outstanding performance for alkaline oxygen evolution reaction (OER) with an overpotential of 249 mV at 10 mA cm-2 , a small Tafel slope of 56.5 mV dec-1 , and ultra-long stability up to 166 hours without obvious fading. Moreover, the potential-driven dynamic behaviors of Ni-N4 sites and the contribution of the S dopant at different locations in the matrix to the OER activity are revealed by the operando X-ray absorption spectroscopy and theoretical calculations, respectively.
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