Journal
SCIENCE CHINA-MATERIALS
Volume 60, Issue 9, Pages 849-856Publisher
SCIENCE PRESS
DOI: 10.1007/s40843-017-9086-9
Keywords
electrocatalyst; hydrogen evolution; MoS2; defects; S-vacancies
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Funding
- National Basic Research of China [2015CB932500, 2013CB632702]
- National Natural Science Fundation of China [51302141, 51501008, U1560103, 61274015]
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Molybdenum disulfide (MoS2) has attracted extensive attention as an alternative to replace noble electro-catalysts in the hydrogen evolution reaction (HER). Here, we highlight an efficient and straightforward ball milling method, using nanoscale Cu powders as reductant to reduce MoS2 engineering S-vacancies into MoS2 surfaces, to fabricate a defect-rich MoS2 material (DR-MoS2). The micron-sized DR-MoS2 catalysts exhibit significantly enhanced catalytic activity for HER with an overpotential (at 10 mA cm(-2)) of 176 mV in acidic media and 189 mV in basic media, surpassing most of Mo-based catalysts previously reported, especially in basic solution. Meanwhile stability tests confirm the outstanding durability of DR-MoS2 catalysts in both acid and basic electrolytes. This work not only opens a new pathway to implant defects to MoS2, but also provides low-cost alternative for efficient electrocatalytic production of hydrogen in both alkaline and acidic environments.
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