Interface engineering for enhancing electrocatalytic oxygen evolution reaction of CoS/CeO2 heterostructures

To realize renewable energy conversion, it is important to develop low-cost and high-efficiency electrocatalyst for oxygen evolution reaction. In this communication, a novel bijunction CoS/CeO₂ electrocatalyst grown on carbon cloth is prepared by the interface engineering. The interface engineering of CoS and CeO₂ facilitates a rapid charge transfer from CeO₂ to CoS. Such an electrocatalyst exhibits outstanding electrocatalytic activity with a low overpotential of 311 mV at 10 mA?cm^?2 and low Tafel slope of 76.2 mV?dec^–1, and is superior to that of CoS (372 mV) and CeO₂ (530 mV) counterparts. And it has long-term durability under alkaline media.