화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.65, 167-174, September, 2018
DOI10.1016/j.jiec.2018.04.025  Export Citation
WS2/CoSe2 heterostructure: A designed structure as catalysts for enhanced hydrogen evolution performance
Sajjad Hussain1, 2, Kamran Akbar3, Dhanasekaran Vikraman4, Hailiang Liu1, 2, Seung-Hyun Chun3, †, and Jongwan Jung1, 2, †
  • 1Graphene Research Institute, Sejong University, Seoul 05006, Republic of Korea
  • 2Institute of Nano and Advanced Materials Engineering, Sejong University, Seoul 05006, Republic of Korea
  • 3Department of Physics, Sejong University, Seoul 05006, Republic of Korea
  • 4Division of Electronics and Electrical Engineering, Dongguk University-Seoul, Seoul 04620, Republic of Korea
E-mail:,
The development of hydrogen-evolving catalysts based on transition metal dichalchogenides (TMDs) is receiving a great attention for practical application of water-splitting devices and fuel cells due to their high electrocatalytic activity. Herein, we synthesized tungsten disulfide (WS2)/cobalt diselenide (CoSe2) hybrid catalyst for hydrogen evolution reaction (HER). CoSe2 films were first deposited via electrodeposition of Co and followed by selenization process. And, the surface of the synthesized CoSe2 films was covered with WS2 via combined process of sputtering and sulfurization. In acidic media, the WS2/CoSe2 heterostructure catalyst exhibited fast hydrogen evolution kinetics of onset potential and Tafel slope were at 95 mV and 44 mV decade-1, respectively with the excellent electrocatalytic stability over 20 h. WS2/CoSe2 heterostructure electrode demonstrates an excellent HER activity and long-term stability owing to their abundant active edge sites, and the strong chemical and electronic coupling between the CoSe2 and WS2.
Keywords:Hydrogen evolution reaction;Transitin metal dichalcogenide;Hybrid catalyst;Sputtering;CVD
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