Nickel–cobalt alloy doping phosphorus as advanced electrocatalyst for hydrazine oxidation

Seeking high activity non-noble-metal electrocatalysts is essential to develop high performance hydrazine fuel cells. In this study, an electrocatalyst of phosphorus doped nickel-cobalt alloy is fabricated for hydrazine oxidation reaction (HzOR). A series of physical and electrochemistry results show that, among as-prepared four electrocatalysts, the NiCoP/C has the lowest Tafel slope, the highest current density, the longest durability and relative low apparent activation energy for HzOR. Moreover, the influences of KOH and N₂H₄ concentrations, scanning speeds as well as the temperatures as to NiCoP/C electrocatalyst towards HzOR are also investigated. Besides, electrochemical impedance test exhibits as-obtained NiCoP/C owes good charge transfer kinetics. This work would stimulate more study to explore P doped non-noble metal electrocatalyst in the future.