EXCELLENT ELECTROCATALYSIS OF OXYGEN EVOLUTION USING MESOPOROUS CARBON NANOCOMPOSITES
Abstract
Oxygen evolution reaction (OER) is of great importance in splitting water. However, the sluggish OER kinetics at the anode severely hinders the H2 evolution at the cathode which is a crucial procedure for energy storage. Herein, we report the synthesis of a new OER catalyst of Co(OH)x(WOvia a one-step hydrothermal method, where the incorporation of WO as a condenser greatly enhanced the electrocatalytic activity of Co(OH)2 toward OER. Moreover, the introduction of mesoporous carbon (MC) further improves the electrocatalytic performance of Co(OH)x(WO by forming the nanocomposites of Co(OH)x(WO/MC. The synergism between Co(OH)2 and WO and the synergistic catalytic effect of Co(OH)x(WO and MC majorly contributed to the apparently enhanced electrocatalysis of Co(OH)x(WO/MC toward OER. This work provides an efficient strategy to improve the electrocatalytic activity of Co(OH)2 by introducing WO and forming nanocomposites between Co(OH)x(WO and MC for low-cost, convenient and highly efficient water oxidation.