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Design, Synthesis and High HER Performances of 3D Ni/Mo Sulfide on Ni Foam
Author(s) -
Liang Chong,
Cao Wei,
Zhou Linsen,
Yang Pan,
Zhao Xiaochong,
Zhao Pengxiang,
Qiu Ruizhi,
Yang Lijun,
Huang Qingsong,
Astruc Didier
Publication year - 2020
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201902278
Subject(s) - overpotential , electrochemistry , noble metal , materials science , catalysis , nanorod , density functional theory , chemical engineering , sulfide , hydrothermal circulation , nanotechnology , adsorption , electrode , metal , chemistry , computational chemistry , metallurgy , organic chemistry , engineering
Exploring noble‐metal‐free and earth‐abundant electrocatalysts for the hydrogen evolution reaction (HER) is an efficient way to mitigate energy and protect the environment. Herein, a noble‐metal‐free core‐shell catalyst, MoS 2 /Ni 3 S 2 /NF, was designed for HER and synthesized using a simple one‐step hydrothermal method. The MoS 2 −Ni 3 S 2 hetero‐structured nanorods show a high HER performance with an overpotential of 93 mV at a current density of 10 mA/cm 2 in alkaline conditions. The study combines density function theory (DFT) calculation with electrochemical experiments proved that the strong coupling synergy between MoS 2 and Ni 3 S 2 optimizes the electronic structure of the product and reduces the adsorption energy of water molecules, thus significantly enhancing the electrochemical HER activity. This work reveals the reaction mechanism of electrochemical hydrolysis and might shed some new lights on the design and fabrication of efficient and robust three‐dimensional hybrid electrode materials for a variety of electrochemical applications