Influence of Alkali Metal Cations on the Oxygen Reduction Activity of Pt₅Y and Pt₅Gd Alloys.

ABSTRACT: Electrolyte species can significantly influence the electrocatalytic performance. In this work, we investigate the impact of alkali metal cations on the oxygen reduction reaction (ORR) on active Pt₅Gd and Pt₅Y polycrystalline electrodes. Due to the strain effects, Pt alloys exhibit a higher kinetic current density of ORR than pure Pt electrodes in acidic media. In alkaline solutions, the kinetic current density of ORR for Pt alloys decreases linearly with the decreasing hydration energy in the order of Li⁺ > Na⁺ > K⁺ > Rb⁺ > Cs⁺, whereas Pt shows the opposite trend. To gain further insights into these experimental results, we conduct complementary density functional theory calculations considering the effects of b

SUBMITTER: Song KT 

PROVIDER: S-EPMC10983829 | biostudies-literature | 2024 Mar

REPOSITORIES: biostudies-literature