Electrodeposition of nanoporous nickel selenide on graphite rod as a bifunctional electrocatalyst for hydrogen and oxygen evolution reactions

Abstract

• A novel NiSe nanoelectrocatalyst was synthesized. • This nanostructure was obtained by controlling the electrodeposition conditions. • The synergistic effect and high surface area were the main affecting factors. • Comparing to Pt catalyst, the optimized electrode has an excellent HER performance. The purpose of this paper is to synthesize the nanoporous structure of nickel selenide by cyclic voltammetry technique on a graphite rod substrate that is active for water splitting. This is the first report of the manufacture of this morphology as impressive water splitting electrocatalyst on a graphite rod substrate using a rapid, one-step, and cost-effective electrodeposition technique. Herein, first, a graphite rod was modified with nickel selenide nanoporous by controlling the electrodeposition condition. The main outcomes reveal that the optimized Ni-Se coverage on graphite rod substrate illustrates hopeful HER acting with fewer overpotentials of −100.7, −281.3, and −552.9 mV at the current densities of −10, −100, and −400 mA. cm −2 , in order. Besides, the manufactured Ni-Se nanoporous catalyst is extremely energetic into OER, needing just 268 mV overpotentials for 10 mA. cm −2 current density. This research proposes a cost-effective and fast manner for manufacturing a novel nanoporous electrocatalyst that is a very active electrocatalyst for H 2 and O 2 improvement reactions. These outcomes propose that electrocatalyst is capable to be used for creating renewable-resource energy in industrial usage.