Hydrogen Evolution Catalyzed by a Molybdenum Sulfide Two-Dimensional Structure with Active Basal Planes
Source abstract
Abstract
Molybdenum disulfide has been demonstrated as a promising catalyst for hydrogen evolution reaction (HER). However, its performance is limited by fractional active edge sites and the strong dependence on hydrogen coverage. In this study, we find an enhanced HER performance in a two-dimensional substoichiometric molybdenum sulfide. Both first-principles calculations and experimental results demonstrate that the basal plane is catalytically active toward HER, as evidenced by an optimum Gibbs free energy and a low reaction overpotential. More interestingly, the HER performance is insensitive to hydrogen coverage and can be improved under compressive in-plane biaxial strains. Our results suggest not only an improved HER performance of substoichiometric molybdenum sulfide due to its chemical reactive basal plane but also a way to tune the performance.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Electrocatalysts for Energy Conversion · 2D Materials and Applications · MXene and MAX Phase Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117542, Singapore
Institute of Materials Research and Engineering, A*STAR, 2 Fusionopolis Way, Singapore 138634, Singapore
Department of Chemistry, National University of Singapore, Singapore 117543, Singapore
Centre for Advanced 2D Materials and Graphene Research, National University of Singapore, 6 Science Drive 2, Singapore 117546, Singapore
Department of Materials Science & Engineering, National University of Singapore, Singapore 119260, Singapore
Funding
Institute of Materials Research and Engineering
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