Enhanced oxygen evolution reaction of defective CoP/MOF-integrated electrocatalyst by partial phosphating

Abstract

Metal–organic frameworks (MOFs) have been considered as versatile materials for applications in energy fields. For improving reactivity, structural collapse will cut the important advantage of frameworks and hinder the exposure to reactive centers. Herein, we constructed rich structural vacancies in MOFs by the thermal decomposition of specific functional groups, which will not only expose more reactive sites and modulate the electronic structure on the premise of maintaining the frame structure but also benefit in situ derivations to form uniformly along the defect interface. After integrating metal phosphides with defective MOFs, the electrocatalyst shows a low overpotential of 295 mV at 10 mA cm⁻² and long-term OER stability, both of which are primarily attributed to the enlarged electrochemically active surface area and accelerated charge-transfer rate in the unique structure.