Quasi-Paired Pt Atomic Sites on Mo₂ C Promoting Selective Four-Electron Oxygen Reduction.

ABSTRACT: Atomically dispersed Pt species are advocated as a promising electrocatalyst for the oxygen reduction reaction (ORR) to boost noble metal utilization efficiency. However, when assembled on various substrates, isolated Pt single atoms are often demonstrated to proceed through the two-electron ORR pathway due to the unfavorable O─O bond cleavage thermodynamics in the absence of catalytic ensemble sites. In addition, although their distinct local coordination environments at the exact single active sites are intensively explored, the interactions and synergy between closely neighboring single atom sites remain elusive. Herein, atomically dispersed Pt monomers strongly interacting on a Mo₂ C support is demonstrated as a model catalyst in the four-electron ORR, and the beneficial int

SUBMITTER: Zhang L 

PROVIDER: S-EPMC8456204 | biostudies-literature | 2021 Sep

REPOSITORIES: biostudies-literature