Affiliation:
1. Dept. of Nano Convergence Engineering Jeonbuk National University Jeonju Jeonbuk 54896 Republic of Korea
2. Carbon Composite Research Centre Department of Polymer–Nano Science and Technology Jeonbuk National University Jeonju Jeonbuk 54896 Republic of Korea
Abstract
AbstractElectrochemical water splitting stands out as a highly effective and environment‐friendly strategy for generating pure hydrogen. However, the expensive catalyst required, and the low efficiency of water electrolysis, are still of concern. Herein, a novel Rh–CoSe2/CoSeO3 nanocubes heterostructure is designed with a successful robust coupling between CoSe2 and CoSeO3, and employed as a bifunctional electrocatalyst for the water splitting system. The interaction enhances metal–substrate bonding and generates the anchor sites for intermediate species, which increases the electrocatalytic efficiency and mass transport kinetics, and offers exceptional stability. The water‐splitting device demonstrates remarkable performance, with a low voltage of 1.62 V at a current density of 20 mA cm−2 and long‐lasting durability for ‐100 h. This study opens a new avenue toward the creation of extremely effective and long‐lasting catalysts to be used at an industrial scale to allow alkaline water splitting and for other energy conversion devices. The Rh–CoSe2/CoSeO3 heterostructure offers promising prospects for advancing sustainable energy technologies and positively impacting the clean energy of the future.