Chemically activating MoS2 via spontaneous atomic palladium interfacial doping towards efficient hydrogen evolution

Nature Communications
Zhaoyan LuoWei Xing

Abstract

Lacking strategies to simultaneously address the intrinsic activity, site density, electrical transport, and stability problems of chalcogels is restricting their application in catalytic hydrogen production. Herein, we resolve these challenges concurrently through chemically activating the molybdenum disulfide (MoS2) surface basal plane by doping with a low content of atomic palladium using a spontaneous interfacial redox technique. Palladium substitution occurs at the molybdenum site, simultaneously introducing sulfur vacancy and converting the 2H into the stabilized 1T structure. Theoretical calculations demonstrate the sulfur atoms next to the palladium sites exhibit low hydrogen adsorption energy at -0.02 eV. The final MoS2 doped with only 1wt% of palladium demonstrates exchange current density of 805 μA cm-2 and 78 mV overpotential at 10 mA cm-2, accompanied by a good stability. The combined advantages of our surface activating technique open the possibility of manipulating the catalytic performance of MoS2 to rival platinum.

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Citations

Jul 25, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Jiang-Yan XueJian-Ping Lang
Sep 13, 2019·Small·Zhi-Wen GaoLawrence Yoon Suk Lee
Feb 6, 2020·Angewandte Chemie·Alejandro Méndez-ArdoyJavier Montenegro
Aug 15, 2020·Chemistry, an Asian Journal·Yaojia ChengSiyu Lu
Nov 16, 2019·Advanced Science·Bin ZhangHan Zhang
Mar 7, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Chao MengYue Zhou
Feb 12, 2020·Advanced Science·Zegao WangMingdong Dong
May 19, 2020·Advanced Materials·Zhe LiXi-Wen Du
Dec 22, 2019·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Juan AliagaEglantina Benavente
Dec 7, 2019·Chemical Communications : Chem Comm·Ori Geuli, Daniel Mandler
Mar 1, 2020·Nature Communications·Zhaoyan LuoJunjie Ge
Feb 26, 2021·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Wen QiaoDunhui Wang

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Methods Mentioned

BETA
X-ray
transmission electron microscopy
scanning
ESR

Software Mentioned

Vienna ab initio Simulation Packageusing ( VASP )

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