Enhanced hydrogen evolution reaction activity of hydrogen-annealed vertical MoS₂ nanosheets.

ABSTRACT: Molybdenum disulfide (MoS₂) is a promising electrocatalyst for hydrogen evolution reaction (HER), but only edges and S-vacancies are catalytic active sites for the HER. Therefore, it is crucial to increase edge sites and S-vacancies for enhancing the HER activity of MoS₂. Here, we report an enhanced HER activity of MoS₂ by combing vertical nanosheets and H₂ annealing. Compared to horizontal MoS₂ nanosheets, pristine vertical MoS₂ nanosheets showed better HER activity due to a larger amount of edges. H₂ annealing further enhanced the HER activity of vertical MoS₂ nanosheets remarkably. Scanning electron microscopy (SEM), X-ray photoelectron spectra (XPS) and electrochemical impedance spectroscopy (EIS) w

SUBMITTER: He M 

PROVIDER: S-EPMC9079879 | biostudies-literature | 2018 Apr

REPOSITORIES: biostudies-literature