In:
Small, Wiley, Vol. 17, No. 13 ( 2021-04)
Abstract:
The hydrogen evolution reaction (HER) is a significant cathode step in electrochemical devices, especially in water splitting, but developing efficient HER catalysts remains a great challenge. Herein, comprehensive density functional theory calculations are presented to explore the intrinsic HER behaviors of a series of ruthenium dichalcogenide crystals (RuX 2 , X = S, Se, Te). In addition, a simple and easily scaled production strategy is proposed to synthesize RuX 2 nanoparticles uniformly deposited on carbon nanotubes. Consistent with theoretical predictions, the RuX 2 catalysts exhibit impressive HER catalytic behavior. In particular, marcasite‐type RuTe 2 (RuTe 2 ‐M) achieves Pt‐like activity (35.7 mV at 10 mA cm −2 ) in an acidic electrolyte, and pyrite‐type RuSe 2 presents outstanding HER performance in an alkaline media (29.5 mV at 10 mA cm −2 ), even superior to that of commercial Pt/C. More importantly, a RuTe 2 ‐M‐based proton exchange membrane (PEM) electrolyzer and a RuSe 2 ‐based anion exchange membrane (AEM) electrolyzer are also carefully assembled, and their outstanding single‐cell performance points to them being efficient cathode candidates for use in hydrogen production. This work makes a significant contribution to the exploration of a new class of transition metal dichalcogenides with remarkable activity toward water electrolysis.
Type of Medium:
Online Resource
ISSN:
1613-6810
,
1613-6829
DOI:
10.1002/smll.202007333
Language:
English
Publisher:
Wiley
Publication Date:
2021
detail.hit.zdb_id:
2168935-0
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