Electrocatalysts for high-rate hydrogen evolution reaction (HER) are crucial to clean fuel production. Nitrogen-rich 2D transition metal nitride, designated "nitridene", has shown promising HER performance because of its unique physical/chemical properties. However, its synthesis is hindered by the sluggish growth kinetics. Here for the first time using a catalytic molten-salt method, we facilely synthesized a V-Mo bimetallic nitridene solid solution, V0.2 Mo0.8 N1.2 , with tunable electrocatalytic property. The molten-salt synthesis reduces the growth barrier of V0.2 Mo0.8 N1.2 and facilitates V dissolution via a monomer assembly, as confirmed by synchrotron spectroscopy and ex situ electron microscopy. Furthermore, by merging computational simulations, we confirm that the V doping leads to an optimized electronic structure for fast protons coupling to produce hydrogen. These findings offer a quantitative engineering strategy for developing analogues of MXenes for clean energy conversions.
Keywords: 2D Nitridene; Catalyst Design; Electrocatalysis; Hydrogen Evolution; MXenes.
© 2022 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH.