Self-supported and defect-rich CoP nanowire arrays with abundant catalytic sites as a highly efficient bifunctional electrocatalyst for water splitting
NEW JOURNAL OF CHEMISTRY(2022)
摘要
It is an indisputable fact that electrocatalytic activity is always improved by introducing defects into nanomaterials. Thus, this study demonstrates a simple strategy for a defect-rich and porous cobalt phosphide nanowire array electrocatalyst derived from a MOF material on a nickel foam, which drives water splitting well in alkaline media. Excitingly, p-CoP/NF shows an excellent catalytic performance toward the hydrogen evolution reaction with an ultralow overpotential of 35 mV to achieve 10 mA cm(-2). Similarly, it is capable of the oxygen evolution reaction and reaches a current density of 10 mA cm(-2) with an overpotential of 253 mV. Furthermore, when the anode and cathode of a two-electrode electrolytic cell are both assembled from p-CoP/NF electrodes, this cell requires a voltage of only 1.55 V to afford a current density of 10 mA cm(-2) and exhibits satisfactory durability, which fully demonstrates the potential application of p-CoP/NF electrodes for water splitting.
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关键词
efficient bifunctional electrocatalysts,defective cop nanowire arrays,water splitting,abundant catalytic sites,self-supported
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