▎ 摘　　要

Designing an efficient, cheap and abundant catalyst for oxygen evolution reaction (OER) is crucial for the development of sustainable energy sources. A novel catalyst which could be a promising candidate for such electrocatalysts is described. Co0.85Se supported on three-dimensional hierarchical porous graphene-like carbon (HPG) exhibits outstanding catalytic performances for OER in alkaline medium. It is found that the onset overpotential is 311 mV on the Co0.85Se/HPG electrode, which is more 28 and 41 mV negative than that on the Co/HPG and Co3O4/HPG electrodes. What's more, the value of Tafel slope is 61.7 mV dec(-1) and the overpotential at the current density of 10 mA cm(-2) is 385 mV on this electrode. The Co0.85Se/HPG of this work is an appealing electrocatalyst for OER in basic electrolyte. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.