L1-PtCo and L1-PtCo Intermetallics for Oxygen Reduction Reaction: The Influence of Composition and Structure on Properties.

Pt-based intermetallics are regarded as highly efficient electrocatalysts for oxygen reduction reaction (ORR). However, Pt-based intermetallics with different Pt: M atomic ratios have different atomic arrangements and crystal structures, which will change the electronic structure and coordination environment of Pt, thus affecting the electrocatalytic activity. In this work, we prepared L1-PtCo and L1-PtCo intermetallic catalysts by modulating the molar ratio of Pt and Co precursors using a thermal annealing method.