Synergetic coupling of Pd nanoparticles and amorphous MoSx toward highly efficient electrocatalytic hydrogen evolution reactions

Liu, X, Gao, S, Yang, P, Wang, B, Ou, J, Liu, Z and Wang, Y 2018, 'Synergetic coupling of Pd nanoparticles and amorphous MoSx toward highly efficient electrocatalytic hydrogen evolution reactions', Applied Materials Today, vol. 13, pp. 158-165.


Document type: Journal Article
Collection: Journal Articles

Title Synergetic coupling of Pd nanoparticles and amorphous MoSx toward highly efficient electrocatalytic hydrogen evolution reactions
Author(s) Liu, X
Gao, S
Yang, P
Wang, B
Ou, J
Liu, Z
Wang, Y
Year 2018
Journal name Applied Materials Today
Volume number 13
Start page 158
End page 165
Total pages 8
Publisher Elsevier BV
Abstract Noble metal palladium (Pd) has been widely used in hydrogen-related catalytic reactions. However, its performances toward hydrogen evolution reactions (HER) are intrinsically restricted due to a strong bonding of PdH thus make the hydrogen desorption difficult. In this work, being as an electroncocatalyst, Pd nanoparticles are anchored on our well-established amorphous MoSx/TiO2 nanotube arrays (TNAs) electrocatalyst system through an electrochemical deposition technique. The unique electronic structure in the S-vacancies and/or unsaturated S atoms of MoSx significantly weaken the PdH bonding in the electrocatalytic process, facilitating the hydrogen desorption process. In the meantime, conductivity of MoSx/TNAs is largely improved due to incorporation of Pd nanoparticles into the system, which enables the charge transfer from electrode to active site of MoSx more efficient. The synergetic coupling of Pd and MoSx/TNAs result in a superior electrocatalytic activity, achieving an onset overpotential of -29 mV, overpotentials of -64 and -88 mV at -10 and -20 mA cm-2, which are equivalent to that from Pt catalysts.
Subject Materials Engineering not elsewhere classified
Keyword(s) Amorphous MoSx
Electroncocatalyst
Hydrogen evolution reaction
Pd nanoparticles
Synergetic coupling
DOI - identifier 10.1016/j.apmt.2018.09.001
Copyright notice © 2018 Elsevier Ltd. All rights reserved.
ISSN 2352-9407
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