TY - JOUR
T1 - WS2/CoSe2 heterostructure
T2 - A designed structure as catalysts for enhanced hydrogen evolution performance
AU - Hussain, Sajjad
AU - Akbar, Kamran
AU - Vikraman, Dhanasekaran
AU - Liu, Hailiang
AU - Chun, Seung Hyun
AU - Jung, Jongwan
N1 - Publisher Copyright:
© 2018 The Korean Society of Industrial and Engineering Chemistry
PY - 2018/9/25
Y1 - 2018/9/25
N2 - 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.
AB - 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.
KW - CVD
KW - Hybrid catalyst
KW - Hydrogen evolution reaction
KW - Sputtering
KW - Transitin metal dichalcogenide
UR - http://www.scopus.com/inward/record.url?scp=85047065158&partnerID=8YFLogxK
U2 - 10.1016/j.jiec.2018.04.025
DO - 10.1016/j.jiec.2018.04.025
M3 - Article
AN - SCOPUS:85047065158
SN - 1226-086X
VL - 65
SP - 167
EP - 174
JO - Journal of Industrial and Engineering Chemistry
JF - Journal of Industrial and Engineering Chemistry
ER -