Defect-Rich CoP/Nitrogen-Doped Carbon Composites Derived from a Metal-Organic Framework: High-Performance Electrocatalysts for the Hydrogen Evolution Reaction

A defect-rich CoP/nitrogen-doped carbon composite is reported for the first time derived from ZIF-67 by means of low-temperature phosphidation process. As a hydrogen evolution reaction electrocatalyst, the obtained CoP-N-C has high HER activity and good stability with a low onset overpotential of 31mV, a small Tafel slope of 42mVdec(-1), a large exchange current density of 1.6x10(-1)mAcm(-2), and a 10mAcm(-2) current density at overpotential 91mV.