Hybrid Nanostructure of Mixed Transition Metal Oxysulfides Supported by Porous PBA as Efficient Electrocatalysts for the Oxygen Evolution Reaction

Abstract

Abstract The construction of highly active and durable non‐noble‐metal electrocatalysts for the oxygen evolution reaction (OER) is an ongoing challenge. Here, we report the development of a hybrid nanostructure of PBA cubes wrapped with mixed W‐Co oxysulfides in a hair‐like structure through sulfurization of polyoxometalate (Co III W 12 POM) as a bimetallic precursor. These unique heterostructures of PBA@Co−W−O−S grafted on carbon cloth afford abundant active sites and improved charge transfer kinetics that synergistically enhance the OER activity (overpotential of 250 mV at 10 mA cm −2 ). The synthetic approach used in this report can be extended for developing inexpensive, durable and efficient catalysts with diverse structures.