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Controllable Synthesis of CoS 2 @N/S‐Codoped Porous Carbon Derived from ZIF‐67 for as a Highly Efficient Catalyst for the Hydrogen Evolution Reaction
Author(s) -
Feng Shi,
Li Xingyue,
Huo Jia,
Li Qiling,
Xie Chao,
Liu Tingting,
Liu Zhigang,
Wu Zhenjun,
Wang Shuangyin
Publication year - 2018
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.201701353
Subject(s) - overpotential , catalysis , heteroatom , materials science , carbon fibers , chemical engineering , nanoparticle , electrode , reversible hydrogen electrode , dispersion (optics) , porosity , sulfur , nanotechnology , chemistry , working electrode , electrochemistry , composite material , organic chemistry , composite number , metallurgy , ring (chemistry) , physics , optics , engineering
A convenient, controllable method to fabricate an electrode is necessary to achieve the practical application of a hydrogen evolution reaction (HER) catalyst. In this work, an electrodeposition–ZIF conversion–sulfuration strategy is developed to produce a CoS 2 @N/S‐codoped porous carbon (CoS 2 @NSC/CFP) to drive the HER efficiently. CoS 2 @NSC/CFP was prepared by the electrodeposition of Co(OH) 2 on a carbon fiber paper followed by conversion into ZIF‐67 and subsequent sulfuration with sulfur. The loading of electroactive components can be controlled easily in the range of 0.7–10.0 mg cm −2 by varying electrodeposition time from 5 min to 2 h. The resulting material can be employed directly as a working electrode for the HER and it shows an excellent catalytic activity and stability with an overpotential of 95 mV at 10 mA cm −2 and 158 mV to reach 100 mA cm −2 in an acidic medium. The high efficiency is related intimately to the high dispersion of ultra‐small CoS 2 nanoparticles, heteroatom‐codoping, and the 3 D porous network configuration of the carbon fiber paper.