Tuning the electronic structure of Ag-Pd alloys to enhance performance for alkaline oxygen reduction.

ABSTRACT: Alloying is a powerful tool that can improve the electrocatalytic performance and viability of diverse electrochemical renewable energy technologies. Herein, we enhance the activity of Pd-based electrocatalysts via Ag-Pd alloying while simultaneously lowering precious metal content in a broad-range compositional study focusing on highly comparable Ag-Pd thin films synthesized systematically via electron-beam physical vapor co-deposition. Cyclic voltammetry in 0.1 M KOH shows enhancements across a wide range of alloys; even slight alloying with Ag (e.g. Ag_0.1Pd_0.9) leads to intrinsic activity enhancements up to 5-fold at 0.9 V vs. RHE compared to pure Pd. Based on density functional theory and x-ray absorption, we hypothesize that these enhancements arise mainly from l

SUBMITTER: Zamora Zeledon JA 

PROVIDER: S-EPMC7840808 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature