Subnanometer molybdenum sulfide on carbon nanotubes as a highly active and stable electrocatalyst for hydrogen evolution reaction
Data(s) |
10/02/2016
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Resumo |
Electrochemically splitting water for hydrogen evolution reaction (HER) has been viewed as a promising approach to produce renewable and clean hydrogen energy. However, searching for cheap and efficient HER electrocatalysts to replace the currently used Pt-based catalysts remains an urgent task. Herein, we develop a one-step carbon nanotube (CNT) assisted synthesis strategy with CNTs' strong adsorbability to mediate the growth of subnanometer-sized MoS(x) on CNTs. The subnanometer MoS(x)-CNT hybrids achieve a low overpotential of 106 mV at 10 mA cm(-2), a small Tafel slope of 37 mV per decade, and an unprecedentedly high turnover frequency value of 18.84 s(-1) at η = 200 mV among all reported non-Pt catalysts in acidic conditions. The superior performance of the hybrid catalysts benefits from the presence of a higher number of active sites and the abundant exposure of unsaturated S atoms rooted in the subnanometer structure, demonstrating a new class of subnanometer-scale catalysts. |
Identificador | |
Idioma(s) |
eng |
Publicador |
American Chemical Society |
Relação |
http://dro.deakin.edu.au/eserv/DU:30084945/cai-subnanometermolybdenum-2016.pdf http://www.dx.doi.org/10.1021/acsami.5b08816 |
Direitos |
2016, American Chemical Society |
Palavras-Chave | #carbon nanotubes #electrocatalysts #hydrogen evolution reaction #molybdenum sulfide #subnanometer |
Tipo |
Journal Article |