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Metal-organic framework-derived MoSx composites as efficient electrocatalysts for hydrogen evolution reaction

Authors
Do, Ha HuuQuyet Van LeTekalgne, Mahider AsmareAnh Vy TranLee, Tae HyungHong, Sung HyunHan, Sang MokAhn, Sang HyunKim, Young JuJang, Ho WonKim, Soo Young
Issue Date
25-1월-2021
Publisher
ELSEVIER SCIENCE SA
Keywords
Metal-organic framework; Hydrogen evolution reaction; Electrocatalyst; MoSx
Citation
JOURNAL OF ALLOYS AND COMPOUNDS, v.852
Indexed
SCIE
SCOPUS
Journal Title
JOURNAL OF ALLOYS AND COMPOUNDS
Volume
852
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/50066
DOI
10.1016/j.jallcom.2020.156952
ISSN
0925-8388
Abstract
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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