Tailoring metal-oxide-supported PtNi as bifunctional catalysts of superior activity and stability for unitised regenerative fuel cell applications

• DOI: 10.1016/j.elecom.2021.106963
• Publication Date: 2021-02-10T09:10:51Z
• Authors: Dušan Mladenović; Diogo M.F. Santos; Gamze Bozkurt; Gulin S.P. Soylu; Ayşe B. Yurtcan; Šćepan Miljanić; Biljana Šljukić
• Keywords: Overpotential; Non-blocking I/O; Exchange current density; Oxygen evolution

Three different metal oxides based on Mn2O3 with TiO2 or NiO were synthesised. Pt PtNi nanoparticles anchored each support, creating a set of nine samples that tested for the oxygen reduction reaction (ORR) and evolution (OER). PtNi/Mn2O3-NiO showed most promising results ORR as evidenced by lowest Tafel slope, highest diffusion-limited current density number electrons exchanged, along stability. The best performance reflects its electrochemical surface area charge-transfer resistance. Furthermore, this catalyst high activity OER low slope at an overpotential 400 mV. present study indicated active sites two reactions, i.e., NPs OER.