Densely populated macrocyclic dicobalt sites in ladder polymers for low-overpotential oxygen reduction catalysis.

ABSTRACT: Dual-atom catalysts featuring synergetic dinuclear active sites, have the potential of breaking the linear scaling relationship of the well-established single-atom catalysts for oxygen reduction reaction; however, the design of dual-atom catalysts with rationalized local microenvironment for high activity and selectivity remains a great challenge. Here we design a bisalphen ladder polymer with well-defined densely populated binuclear cobalt sites on Ketjenblack substrates. The strong electron coupling effect between the fully-conjugated ladder structure and carbon substrates enhances the electron transfer between the cobalt center and oxygen intermediates, inducing the low-to-high spin transition for the 3d electron of Co(II). In situ techniques and theoretical calculations reveal the dyna

SUBMITTER: Zhang Z 

PROVIDER: S-EPMC11754586 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature