Efficient hydrogen production on MoNi4 electrocatalysts with fast water dissociation kinetics
Citations Over TimeTop 1% of 2017 papers
Abstract
Various platinum-free electrocatalysts have been explored for hydrogen evolution reaction in acidic solutions. However, in economical water-alkali electrolysers, sluggish water dissociation kinetics (Volmer step) on platinum-free electrocatalysts results in poor hydrogen-production activities. Here we report a MoNi4 electrocatalyst supported by MoO2 cuboids on nickel foam (MoNi4/MoO2@Ni), which is constructed by controlling the outward diffusion of nickel atoms on annealing precursor NiMoO4 cuboids on nickel foam. Experimental and theoretical results confirm that a rapid Tafel-step-decided hydrogen evolution proceeds on MoNi4 electrocatalyst. As a result, the MoNi4 electrocatalyst exhibits zero onset overpotential, an overpotential of 15 mV at 10 mA cm-2 and a low Tafel slope of 30 mV per decade in 1 M potassium hydroxide electrolyte, which are comparable to the results for platinum and superior to those for state-of-the-art platinum-free electrocatalysts. Benefiting from its scalable preparation and stability, the MoNi4 electrocatalyst is promising for practical water-alkali electrolysers.
Related Papers
- → The synergistic effect of light irradiation and interface engineering of the Co(OH)2/MoS2 heterostructure to realize the efficient alkaline hydrogen evolution reaction(2019)43 cited
- → MoS 2 nanosheets on C 3 N 4 realizing improved electrochemical hydrogen evolution(2017)19 cited
- → Effect of the amount of nickel sulphide, molybdenum disulphide and carbon nanosupport on a Tafel slope and overpotential optimization(2017)18 cited
- → Co(Ni)–Mo–Sx Chalcogels Films as pH-Universal Electrocatalysts for the H2 Evolution Reaction(2019)6 cited
- Friction Induced Structural Transformation of Bulk Nanostructured MoS2 for Hydrogen Evolution Reaction(2018)