Rational phosphorization of ferrocene-based metal organic framework for enhanced oxygen evolution and urea oxidation performance

Developing high-performance and inexpensive water-splitting electrocatalysts is crucial for addressing current energy and environmental issues. In this work, a ferrocene (Fc)-based metal organic framework (MOF) was rationally phosphorized to construct a CoFeP/MOF composite electrocatalyst. Thanks to the excellent conductivity, high specific surface area, and rich heterojunction interfaces, the prepared catalyst exhibits outstanding catalytic activity and long-term endurance, which can realize 50 mA cm-- 2 at an overpotential of 246 mV for oxygen evolution reaction (OER) in 1.0 M KOH and a cell potential of 1.441 V (vs. RHE) for urea oxidation reaction (UOR) in 1.0 M KOH and 0.5 M urea. The electrolyzer assembled from the prepared electrode and Pt/C electrode can drive 50 mA cm-- 2 at 1.605 V and 1.524 V (vs. RHE) in the overall/urea-assisted water splitting tests, demonstrating great application prospects. This work provides valuable reference for improving the performance of MOF type bifunctional water electrolysis catalysts.