Transition metal (Fe, Co, Ni) doping enhanced monolith catalysts of 1T−MoS2/Mo for the large-current hydrogen evolution reaction

Abstract

Hydrogen production from electrolytic water is a promising technology for achieving zero carbon emissions in industrial applications. The two-dimensional layered structure of molybdenum disulfide has demonstrated significant catalytic activity for hydrogen evolution reactions in acidic media. However, while 1T−MoS2 has demonstrated catalytic activity on both edge sites and the basal plane of S, the development of additional active sites is necessary. In this study, we synthesized monolithic catalysts of X−1T−MoS2/Mo doped with transition metals. The experimental results demonstrated that this design yielded more active sites, with overpotentials required to reach 10 mA cm−2 lower than those of the basal. Notably, the X−1T−MoS2/Mo monolithic catalyst can withstand strong and continuous bombardment by hydrogen on the electrode surface at high current densities. This catalyst was continuously operated for 200 h at a current density ranging from 300 to 400 mA cm−2, and no degradation in performance was observed.