Molybdenum Carbide‐Based Electrocatalysts for Hydrogen Evolution Reaction

Electrocatalytic water splitting is a promising approach for clean and sustainable hydrogen production. Its large-scale application relies on the availability of low cost and efficient electrocatalysts. Earth-abundant transition-metal carbides, especially molybdenum carbides (Mo_x C), are regarded as potential candidates to replace state-of-art but expensive platinum-group electrocatalysts. In this Review, we summarize recent progress in Mo_x C electrocatalysts for hydrogen evolution reaction (HER). Nanostructure engineering on the design and preparation of highly efficient electrocatalysts based on Mo_x C is presented, followed by the comparison and discussion of HER performance on Mo_x C-based electrocatalysts. Finally, we offer a perspective on the future development of Mo_x C-based electrocatalysts towards HER.