电解质
碳纤维
电流(流体)
电催化剂
电流密度
材料科学
氢
化学工程
碱性燃料电池
无机化学
化学
电极
电化学
复合材料
电气工程
物理化学
复合数
物理
有机化学
量子力学
工程类
作者
Yang Tang,Fan Liu,Wenqian Liu,Shaoli Mo,Xiaohong Li,Daxiang Yang,Yijun Liu,Shu‐Juan Bao
标识
DOI:10.1016/j.apcatb.2022.122081
摘要
Hydrogen evolution reaction (HER) electrocatalysts capable of long-term operation under high current densities are key to the industrialization of water-splitting technology.Although numerous efforts have been devoted to expose active sites sufficiently while increasing the intrinsic catalytic activity, effects of non-kinetic factors on catalytic efficiency have not yet been comprehensively investigated.Herein, multifunctional carbon-armored nickel nanoparticles (NC@NiNPs) were fabricated using an in-situ polymer encapsulation method for use as a HER electocatalyst.NC@NiNPs exhibited low overpotential (74 mV at 10 mA cm -2 ), low Tafel slope (85.49mV dec -1 ) and excellent stability (over 260 h at 1400 mA cm -2 ).Surprisingly, although the intrinsic activity of NC@NiNPs was lower than that of commercial 20% Pt/C, NC@NiNPs provided markedly greater current density than 20% Pt/C as the operating voltage was increased.This result implied that non-kinetic factors influenced the HER process, prompting this investigation to identify these unknown factors.
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