Dual‐Functional Ru/Ni‐B‐P Electrocatalyst Toward Accelerated Water Electrolysis and High‐Stability

Abstract

AbstractDevelopment of advanced electrocatalysts for the green hydrogen production by water electrolysis is an important task to reduce the climate and environmental issues as well as to meet the future energy demands. Herein, Ru/Ni‐B‐P sphere electrocatalyst is demonstrated by a combination of hydrothermal and soaking approaches, meeting the industrial requirement of low cell voltage with stable high‐current operation. The Ru/Ni‐B‐P sphere catalyst demonstrates low overpotentials of 191 and 350 mV at 300 mA cm−2 with stable high current operation, ranking it as one of the best oxygen evolution reaction (OER) electrocatalysts. The bifunctional 2‐E system demonstrates a low cell voltage of 2.49 V at 2000 mA cm−2 in 6 m KOH at 60 °C of harsh industrial operation condition. It also demonstrates outstanding stability with continuous 120 h (5 days) CA operation at 1000 mA cm−2. Further, the hybrid configuration of Ru/Ni‐B‐P || Pt/C being paired with the conventional benchmark electrode demonstrates a record low 2‐E cell voltage of 2.40 V at 2000 mA cm−2 in 6 m KOH and excellent stability at high current of 1500 mA cm−2 under industrial operational condition.