材料科学
电解
化学工程
电解水
纳米棒
分解水
氢
过电位
催化作用
制氢
纳米技术
多孔性
化学
电化学
光催化
复合材料
电极
有机化学
物理化学
工程类
电解质
作者
Zhao Liu,Shunfa Zhou,Shiji Xue,Zhu Guo,Jing Li,Konggang Qu,Weiwei Cai
标识
DOI:10.1016/j.cej.2020.127807
摘要
For the large-scale industrialization of hydrogen production from water electrolysis, cost-effective catalyst toward efficient cathodic hydrogen evolution reaction (HER) has to be developed. Mo2C possesses similar electronic structure to Pt and is considered as a potential alternative HER catalyst while there is still a certain distance to reach the ideal HER activity. Porous nanorod with dense Mo2C/MoO2 heterointerfaces (h-Mo2C/MoO2) was designed via a facile F etching strategy to utilize the electronic effect of spontaneously generated surface MoO2 on Mo2C. Overpotential to deliver 100 mA/cm2 HER for h-Mo2C/MoO2 is low to 152 mV, which is half of that for commercial Pt/C catalyst. Activity in terms of the HER current dentistry at 150 mV overpotential of h-Mo2C/MoO2 is hence 1.23 times higher than that of Pt/C. By considering the good stability as well, the h-Mo2C/MoO2 catalyst shows good application prospect in the practical alkaline water electrolysis devices.
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