3P-251 : Electrodeposited Ni-W alloy as a cathode of proton exchange membrane water electroylzer

Hydrogen production via water electrolysis has been received attention as a promising technology that could be alternative for fossil fuel. Noble metal catalysts are known as the catalyst showing good performance for HER, but expensive cost and its scarcity inhibit commercialization. Alternatively, Ni-based alloy is another promising electrocatalyst representing small Gibbs free energy of hydrogen adsorption, but it has dissolution issue in acidic medium. To overcome this problem, Ni-W alloy was fabricated. In this study, Ni-W alloy for HER was prepared by electrodeposition on carbon paper. The morphology and electronic structure of Ni-W alloys can be modified by controlling the deposition conditions. In addition, the HER performance of Ni-W alloy was investigated in 0.5 M sulfuric acid. Finally, the Ni-W alloy is optimized as a cathode of proton exchange membrane water electrolyzer.