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

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−MoS 2 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−MoS 2 /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−MoS 2 /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. [Display omitted] • Non-precious metal monolithic catalysts with metal interfaces. • The monolithic catalysts can withstand strong and continuous hydrogen bombardment. • It can operate for 200 h at a large current density of 300–400 mA cm−2. • The monolithic catalysts can realize industrial-grade water splitting. [ABSTRACT FROM AUTHOR]