Molybdenum disulfide（MoS2） has attracted extensive attention as an alternative to replace noble electrocatalysts in the hydrogen evolution reaction（HER）. Here, we highlight an efficient and straightforward ball mi...Molybdenum disulfide（MoS2） has attracted extensive attention as an alternative to replace noble electrocatalysts 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 defectrich MoS2material（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 m V in acidic media and 189 m V 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.展开更多
基金supported by the National Basic Research of China (2015CB932500 and 2013CB632702)the National Natural Science Fundation of China (51302141, 51501008, U1560103 and 61274015)
文摘Molybdenum disulfide（MoS2） has attracted extensive attention as an alternative to replace noble electrocatalysts 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 defectrich MoS2material（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 m V in acidic media and 189 m V 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.
