SCHEDULED MAINTENANCE
In situ growth of bimetal–organic framework-derived phosphides on conductive substrate materials as bifunctional electrocatalysts for overall water splitting†
Abstract
Constructing bimetallic phosphides is an effective strategy to develop high-performance non-noble metal based electrochemical water splitting. Here, this article reports that bimetal–organic framework materials were directly grown on Ni foam by an electrodeposition assisted hydrothermal method as precursors, and the corresponding phosphides were obtained by phosphating as efficient bifunctional catalysts for an oxygen evolution reaction (OER) and a hydrogen evolution reaction (HER) in an alkaline medium. The experiments show that the phosphide obtained by phosphating ZIF-67 doped with iron shows better electrocatalytic activity. CoFeP/NF can produce a current density of 50 mA cm−2 with an overpotential of 204 mV when catalyzing the OER reaction. When catalyzing the HER reaction, only a lower overpotential of 350 mV is required to produce a high current density of 50 mA cm−2. In the two-electrode system catalytic water decomposition experiment, a high current density of 50 mA cm−2 can be produced at a potential of 1.81 V.
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