Hybrid of Fe4[Fe(CN)6]3 nanocubes and MoS2 nanosheets on nitrogen-doped graphene realizing improved electrochemical hydrogen production.

To meet the increasing demands for sustainable hydrogen energy, molybdenum sulfide has gained considerable interest as non-precious electrocatalyst for hydrogen evolution reaction (HER) of water. However, effective nanoengineering technologies to boost its catalytic activity are still desirable but limited. Here, using advanced catalyst of N-doped graphene supported hybrid of MoS 2 nanosheets and Fe 4 [Fe(CN) 6 ] 3 (PB) nanocube, we demonstrate a novel solution for the enhancement of HER activity by simultaneously improving the catalytic site numbers and intrinsic unit activity on each catalytic site, as well as the electrical conductivity. In the hybrid catalyst, the proper selection of graphene and PB expedites the electron transfer and the synergistic effect of MoS 2 /graphene/PB influences the HER. Therefore, the present sample is an ideal catalyst towards HER and delivers impressively high catalytic activity, including the ultralow η 10 of 130 mV, superior durability, and large cathodic current density. We believe that this work contributes specific perspective to design and construction of advanced MoS 2 -based catalyst towards HER, and may inspire the development of other hybrid catalysts for sustainable energy conversion application. [ABSTRACT FROM AUTHOR]