Buffering the local pH via single-atomic Mn-N auxiliary sites to boost CO₂ electroreduction.

ABSTRACT: Electrocatalytic CO₂ reduction driven by renewable energy has become a promising approach to rebalance the carbon cycle. Atomically dispersed transition metals anchored on N-doped carbon supports (M-N-C) have been considered as the most attractive catalysts to catalyze CO₂ to CO. However, the sluggish kinetics of M-N-C limits the large-scale application of this type of catalyst. Here, it is found that the introduction of single atomic Mn-N auxiliary sites could effectively buffer the locally generated OH^- on the catalytic interface of the single-atomic Ni-N-C sites, thus accelerating proton-coupled electron transfer (PCET) steps to enhance the CO₂ electroreduction to CO. The constructed diatomic Ni/Mn-N-C catalysts show a CO faradaic efficiency o

SUBMITTER: Yang Y 

PROVIDER: S-EPMC9667912 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature