Molybdenum disulfide (MoS2) has been widely used as a catalyst for the bifunctional activities of hydrogen and oxygen evolution reactions (HER OER). Here, we investigated size dependent HER OER performance MoS2. The smallest (90 nm) MoS2 exhibits lowest overpotential −0.28 V at −10 mAcm−2 1.52 300 with Tafel slopes 151 176 mVdec−1 OER, respectively, compared to bigger sizes (2 μm 6 μm) better i...

Alloying is regarded as one of the most promising strategies for boosting performance catalysts hydrogen evolution reaction (HER) due to adjustable electronic structure and intermediate adsorption. However, there no theory (including d-band center theory) can accurately guide preparation design alloy catalysts, thus resulting all reported are obtained by time-consuming laborious experimental ex...