In Situ Constructed Co2P/FeP4 Heterointerface on Nickel Foam: A Synthesis Route to High-Performance Water Oxidation Electrocatalysts.

Abstract

The development of a high-performance electrocatalyst for the oxygen evolution reaction (OER) is a challenge in water splitting to produce hydrogen. Here, a Co2P/FeP4 heterostructure catalyst was prepared using an in situ assembly-hydrothermal-calcination method (CoFe-P/NF), exhibiting remarkable OER performance. The formation of a heterostructure led to the redistribution of electrons, thereby optimizing the adsorption/desorption of intermediates during the OER process of the catalyst. Meanwhile, the 3D structure inherited from the precursor contributes to enhancing the catalyst's stability. The CoFe-P/NF showed a low overpotential of 263 and 303 mV at current densities of 100 and 500 mA cm-2. Additionally, the CoFe-P/NF had immense stability for 24 h at current densities of 100 and 500 mA cm-2, respectively. Various characterization techniques and electrochemical experiments indicated that the heterostructure of FeP4 and Co2P can improve the OER activity and stability of the catalyst.

Abstract as supplied by the indexing source. © the authors / publisher.