Efficient Hydrogen Evolution Reaction in 2H-MoS<sub>2</sub> Basal Planes Enhanced by Surface Electron Accumulation
oleh: Vimal Krishnamoorthy, Hemanth Kumar Bangolla, Chi-Yang Chen, Yu-Ting Huang, Cheng-Maw Cheng, Rajesh Kumar Ulaganathan, Raman Sankar, Kuei-Yi Lee, He-Yun Du, Li-Chyong Chen, Kuei-Hsieh Chen, Ruei-San Chen
| Format: | Article |
|---|---|
| Diterbitkan: | MDPI AG 2024-01-01 |
Deskripsi
An innovative strategy has been developed to activate the basal planes in molybdenum disulfide (MoS<sub>2</sub>) to improve their electrocatalytic activity by controlling surface electron accumulation (SEA) through aging, annealing, and nitrogen-plasma treatments. The optimal hydrogen evolution reaction (HER) performance was obtained on the surface treated with nitrogen-plasma for 120 s. An overpotential of 0.20 V and a Tafel slope of 120 mV dec<sup>−1</sup> were achieved for the optimized condition. The angle-resolved photoemission spectroscopy measurement confirmed the HER efficiency enhanced by the SEA conjugated with the sulfur vacancy active sites in the MoS<sub>2</sub> basal planes. This study provides new insight into optimizing MoS<sub>2</sub> catalysts for energy applications.