Efficient Hydrogen Evolution Reaction in 2H-MoS2 Basal Planes Enhanced by Surface Electron Accumulation

An innovative strategy has been developed to activate the basal planes in molybdenum disulfide (MoS2) to improve their electrocatalytic activity by controlling surface electron accumulation (SEA) through aging, annealing, and nitrogen-plasma treatments. The optimal hydrogen evolution reaction (HER)...

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Bibliographic Details
Published in:Catalysts 2024-01, Vol.14 (1), p.50
Main Authors: Krishnamoorthy, Vimal, Bangolla, Hemanth Kumar, Chen, Chi-Yang, Huang, Yu-Ting, Cheng, Cheng-Maw, Ulaganathan, Rajesh Kumar, Sankar, Raman, Lee, Kuei-Yi, Du, He-Yun, Chen, Li-Chyong, Chen, Kuei-Hsieh, Chen, Ruei-San
Format: Article
Language:English
Subjects:
Accumulation
Adsorption
Aging
Annealing
Efficiency
Glass substrates
Hydrogen evolution reactions
Molybdenum disulfide
Nitrogen
Optimization
Photoelectric emission
Plasma
Spectrum analysis
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Summary:An innovative strategy has been developed to activate the basal planes in molybdenum disulfide (MoS2) to improve their electrocatalytic activity by controlling surface electron accumulation (SEA) through aging, annealing, and nitrogen-plasma treatments. The optimal hydrogen evolution reaction (HER) performance was obtained on the surface treated with nitrogen-plasma for 120 s. An overpotential of 0.20 V and a Tafel slope of 120 mV dec−1 were achieved for the optimized condition. The angle-resolved photoemission spectroscopy measurement confirmed the HER efficiency enhanced by the SEA conjugated with the sulfur vacancy active sites in the MoS2 basal planes. This study provides new insight into optimizing MoS2 catalysts for energy applications.
ISSN:2073-4344
2073-4344
DOI:10.3390/catal14010050