ChemElectroChem

Journal Article

, Jahangeer Ahmed, Tansir Ahamad, Saad M. Alshehri, . 2017

• Publication Work Type: Original Research Paper
• Publication Online URL: Iron‐Nickel Nanoparticles as Bifunctional Catalysts in Electrolysis of Water

Publication Abstract

Iron-Nickel nanoparticles (Fe-Ni NPs) were successfully synthesized in various stoichiometry from the inverse micelle method followed by combustion at 500oC for 12 h in H2. Ni-rich Fe-Ni NPs crystallize in face centered cubic (fcc) structure while Fe-rich Fe-Ni NPs stabilize in body centered cubic (bcc) structure. Fe-Ni NPs work as the bifunctional electrode materials at room temperature in alkaline medium and show enhanced electro-catalytic activity in the electrolysis of water to H2 evolution and O2 evolution reactions (HER and OER) at low onset potential versus Ag/AgCl as the reference electrode. Low value of tafel slope was also detected for Fe2Ni NPs (~ 470 mV/dec) in the water oxidation reaction. Bifunctional electro-catalysts are significant in renewable and clean energy process like hydrogen - oxygen fuel cells (HOFCs), metal - oxygen batteries etc.