Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 852, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2020.156952
Keywords
Metal-organic framework; Hydrogen evolution reaction; Electrocatalyst; MoSx
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Funding
- Basic Research Laboratory of the National Research Foundation of Korea (NRF) - Korean Government [2018R1A4A1022647]
- Korea Agency for Infrastructure Technology Advancement grant - Ministry of Land, Infrastructure and Transport, Program in 2019 [20IFIP-B13361804, 20IFIP-B133622-04]
- Korea Research Fellowship Program through the National Research Foundation of Korea (NRF) - Ministry of Science and ICT [2020H1D3A1A04081409]
- Chung-Ang University Young Scientist Scholarship (CAYSS)
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Metal-organic frameworks (MOFs) are crystalline porous materials used for energy-related applications, serving as efficient catalysts for hydrogen evolution reactions (HERs). The modification of Co-based MOFs into MoSx can significantly enhance their catalytic activity, offering hope for replacing noble metals with high-performance catalysts in the future.
Metal-organic frameworks (MOFs) have emerged as a class of crystalline porous material for energy-related applications. Many MOF-based materials are efficient catalysts for hydrogen evolution reactions (HERs). Herein, we illustrate a strategy to modify Co-based MOFs into amorphous molybdenum sulfide (MoSx) via a facial solvothermal method. The modification gives rise to CoMoS phases that reduce hydrogen adsorption energy of catalysts. As a result, MoSx substantially improves the catalytic activity of Co-based MOF for HERs. An optimal sample with 40% MoSx delivered the best HER performance with a low onset potential of -147 mV and a Tafel slope of similar to 68 mV decade(-1). Furthermore, the composite catalyst was stable for up to 1000 cycles without any changes in performance. These results suggest that the MoSx/Co-MOF-74 composite is a viable candidate for replacing noble metals as a high-performance catalyst for HER in the future. (C) 2020 Elsevier B.V. All rights reserved.
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