Indirect electrodeposition of a NiMo@Ni(OH)2MoO composite catalyst for superior hydrogen production in acidic and alkaline electrolytes

Insights into alloy/oxide or hydroxide interfaces in Ni–Mo-based electrocatalysts for hydrogen evolution under alkaline conditions

“…[20][21][22] Among them, nickel-based materials are the most used electrocatalysts in alkaline electrolyzers, and especially, nickel-molybdenum (Ni-Mo) bimetallic catalysts exhibit the best HER catalytic performance among all the non-noble metal-based materials. [23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42] Typically, Ni 4 Mo alloy nanoparticles supported by MoO 2 cuboids on nickel foam exhibited zero onset overpotential, an overpotential of 15 mV at 10 mA cm −2 and a low Tafel slope of 30 mV dec −1 in 1 M KOH. 23 Such performance is comparable to that of Pt and superior to those of state-of-the-art Pt-free electrocatalysts.…”