MOF-derived CoP3/FeP on nitrogen-doped carbon nanoarray boosted high-performance hydrogen evolution

Abstract

• CoP 3 /FeP on nitrogen-doped carbon nanoarrays for HER was prepared. • The hybrids were produced by a low-temperature phosphating reaction. • The hybrids possess good HER activity and higher stability. • The features are ascribed to synergistic enhancement. With the gradual exhaustion of fossil energy and the increasingly serious climate problem, hydrogen, as a clean and sustainable energy source, has become the focus of new energy development due to its high energy density. Here, we reported a stable performance nitrogen-doped carbon material coated with CoP 3 /FeP nanoarrays (N C@CoP 3 /FeP) which is produced by a low-temperature phosphating reaction. The experiment proves that combining the phosphide with the nitrogen-doped carbon material increases the electron mobility of the catalyst and improves the slow kinetics of the electrochemical reaction. The obtained N C@CoP 3 /FeP had excellent electrocatalytic performance in 0.5 M H 2 SO 4 electrolyte, the initial overpotential of N C@CoP 3 /FeP was only 50.04 mV with a low Tafel slope (70 mV dec −1 ) and impedance. Additionally, this electrode offers excellent durability whose current density remains 96.3% after 6 h.