Concave Pt-Zn Nanocubes with High-Index Faceted Pt Skin as Highly Efficient Oxygen Reduction Catalyst.

ABSTRACT: High dosage of expensive Pt to catalyze the sluggish oxygen reduction reaction (ORR) on the cathode severely impedes the commercialization of proton exchange membrane fuel cells. Therefore, it is urgent to cut down the Pt catalyst by efficiently improving the ORR activity while maintaining high durability. Herein, magic concave Pt-Zn nanocubes with high-index faceted Pt skin (Pt₇₈ Zn₂₂ ) are proposed for high-efficiency catalysis toward proton exchange membrane fuel cells. These unique structural features endow the Pt-skin Pt₇₈ Zn₂₂ /KB with a mass activity of 1.18 mA μg_Pt ^-1 and a specific activity of 3.64 mA cm^-2 for the ORR at 0.9 V (vs RHE). Meanwhile, the H₂ -O₂ fuel cell assembled by th

SUBMITTER: Liu M 

PROVIDER: S-EPMC9036018 | biostudies-literature | 2022 Apr

REPOSITORIES: biostudies-literature