Constructing Ohmic contact in cobalt selenide/Ti dyadic electrode: The third aspect to promote the oxygen evolution reaction

Useful Contact: Besides optimizing the composition and/or mesoscale structure of the nanocatalysts for accelerating the OER performance, constructing interface contact between the nanocatalysts and current collector is the third aspect to be considered for the design of a OER electrode. An Ohmic contact at the interface of Co0.85Se nanosheets and rationally selected current collector Ti mesh (Ti@Co0.85Se) significantly accelerated the OER, achieving a current density of 29.6 mA cm−2 at an overpotential of 570 mV and high durability in neutral medium.179