计时安培法
过电位
塔菲尔方程
材料科学
电催化剂
催化作用
热解炭
无机化学
玻璃碳
化学工程
循环伏安法
氧化石墨
基质(水族馆)
氢氧化物
电解质
氧化锡
高定向热解石墨
析氧
石墨
氧化物
电化学
热解
化学
冶金
电极
有机化学
物理化学
海洋学
地质学
工程类
作者
Cipriano B. Gozzo,Mário R. S. Soares,F Destro,João B.S.,E. R. Leite
标识
DOI:10.1016/j.ijhydene.2021.12.245
摘要
NiFe-layered doubly hydroxide (LDH) is one of the most active materials for hydroxyl oxidation in an alkaline electrolyte. In this study, we explored a facile method of depositing NiFe-LDH catalyst on pyrolytic graphite sheets (PGSs) to explore the synergistic effects at the substrate–electrocatalyst interface. The catalyst was electrodeposited on PGSs using chronoamperometry. The homogeneous distribution of the catalyst with nanosheet morphology on the PGS's surface produced an ultrathin film. The NiFe25/PGS sample showed a low overpotential (332 mV) and Tafel slope (33 mV dec−1). The fitting of the Nyquist plots was performed using an equivalent circuit, and the NiFe25/PGS (1.69 Ω) sample showed the lowest charge transfer resistance among the studied catalysts. In addition, PGS proved a better substrate for the alkaline oxygen evolution reaction compared to glassy carbon and fluorine-doped tin oxide.
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