电催化剂
催化作用
材料科学
多孔性
化学工程
氢
镍
金属泡沫
冶金
化学
电极
电化学
复合材料
有机化学
物理化学
工程类
作者
Desheng Guo,Donghong Duan,Jie Gao,Xianxian Zhou,Shibin Liu,Yunfang Wang
标识
DOI:10.1016/j.ijhydene.2021.12.011
摘要
It is very important to develop hydrogen evolution catalyst with high activity and low cost to solve energy crisis. The abundant non-precious metals and phosphides have attracted much attention and are expected to replace platinum catalysts. Herein, we report an approach to prepare nest-like porous MnCo–P electrocatalyst on the nickel foam by two-step electrodeposition. The prepared bimetallic phosphide MnCo–P 3 /NF has excellent hydrogen catalytic activity. In the 1 M NaOH solution, the current density of 10 mA cm −2 required overpotential is only 47 mV, its Tafel slope is 56.4 mV dec −1 , and the higher current density 100 mA cm −2 required overpotential is only 112 mV. More importantly, the MnCo–P 3 /NF catalyst has a long-term stability of electrocatalytic hydrogen evolution. After 24 h catalytic hydrogen evolution test at a constant current density of 20 mA cm −2 , its potential basically does not change. Furthermore, the current density only changes slightly after 1500 cycles of CV test. All these well prove that the prepared MnCo–P 3 /NF catalyst has a long-term hydrogen evolution stability. According to performance testing and morphological characterization, the MnCo–P 3 /NF has a high hydrogen catalytic activity and stability are due to its larger active area, lower interface charge transfer resistance and stronger mechanical stability. In summary, the study explores a method of preparing bimetallic phosphides as an efficient and stable hydrogen evolution catalyst. • Nest-like porous MnCo–P/NF is prepared by two-step electrodeposition. • MnCo–P 3 /NF electrocatalyst exhibit excellent catalytic activity and high stability. • The amount of Mn doping could optimize the electronic structure of the product.
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