过电位
电催化剂
塔菲尔方程
材料科学
催化作用
电化学
硫化物
纳米技术
化学工程
电极
物理化学
化学
冶金
有机化学
工程类
作者
Xiaofeng Zhou,Yuting Yang,Mohamed Nejib Hedhili,Henan Li,Shixiong Min,Jun Ming,Kuo‐Wei Huang,Wenjing Zhang,Lain‐Jong Li
出处
期刊:Nano Energy
[Elsevier]
日期:2017-02-01
卷期号:32: 470-478
被引量:107
标识
DOI:10.1016/j.nanoen.2017.01.011
摘要
There exists a strong demand to replace expensive noble metal catalysts with efficient and earth-abundant catalysts for hydrogen evolution reaction (HER). Recently the Co- and Mo-based sulfides such as CoS2, Co9S8, and MoSx have been considered as several promising HER candidates. Here, a highly active and stable hybrid electrocatalyst 3D flower-like hierarchical Co9S8 nanosheets incorporated with MoSx has been developed via a one-step sulfurization method. Since the amounts of Co9S8 and MoSx are easily adjustable, we verify that small amounts of MoSx promotes the HER activity of Co9S8, and vise versa. In other words, we validate that symmetric synergy for HER in the Co- and Mo-based sulfide hybrid catalysts, a long-standing question requiring clear experimental proofs. Meanwhile, the best electrocatalyst Co9S8[email protected]x/CC in this study exhibits excellent HER performance with an overpotential of −98 mV at −10 mA/cm2, a small Tafel slope of 64.8 mV/dec, and prominent electrochemical stability.
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