Multi‐Component PtFeCoNi Core‐Shell Nanoparticles on MWCNTs as Promising Bifunctional Catalyst for Oxygen Reduction and Oxygen Evolution Reactions

Abstract The development of commercially viable fuel cells and metal‐air batteries requires effective cheap bifunctional catalysts for the oxygen reduction reaction (ORR) evolution (OER). Multi‐component Pt−Fe−Co−Ni nanoparticles on multi‐walled carbon nanotubes (MWCNTs) were synthesized by wet chemistry route via NaBH 4 metal salts, followed sintering at different temperatures. catalyst demonstrates an excellent ORR activity a promising OER in 0.1 m KOH, with bi‐functional over‐potential, ΔE 0.83 V, which is comparable to values Pt/C or RuO 2 . Furthermore, it shows outstanding long‐term stability OER, namely diffusion limited current density potential 0.3 V decreased just 5.5 % after 10000 cycles ORR. results PFCN@NT 300 indicate significant effect substitution Pt transition (TM) formation catalytic performance, especially OER.