Elucidation of the Synergistic Effect of Dopants and Vacancies on Promoted Selectivity for CO Electroreduction to Formate.

Sn-based materials are identified as promising catalysts for the CO electroreduction (CO2RR) to formate (HCOO ). However, their insufficient selectivity and activity remain grand challenges. A new type of SnO nanosheet with simultaneous N dopants and oxygen vacancies (V -rich N-SnO NS) for promoting CO conversion to HCOO is reported.

Dynamic Activation of Adsorbed Intermediates via Axial Traction for the Promoted Electrochemical CO Reduction.

Regulating the local environment and structure of metal center coordinated by nitrogen ligands (M-N ) to accelerate overall reaction dynamics of the electrochemical CO reduction reaction (CO RR) has attracted extensive attention. Herein, we develop an axial traction strategy to optimize the electronic structure of the M-N moiety and construct atomically dispersed nickel sites coordinated with four nitrogen atoms and one axial oxygen atom, which are embedded within the carbon matrix (Ni-N -O/C). The Ni-N -O/C electrocatalyst exhibited excellent CO RR performance with a maximum CO Faradic efficiency (FE) close to 100 % at -0.

Engineering Atomically Dispersed FeN Active Sites for CO Electroreduction.

Atomically dispersed FeN active sites have exhibited exceptional catalytic activity and selectivity for the electrochemical CO reduction reaction (CO2RR) to CO. However, the understanding behind the intrinsic and morphological factors contributing to the catalytic properties of FeN sites is still lacking. By using a Fe-N-C model catalyst derived from the ZIF-8, we deconvoluted three key morphological and structural elements of FeN sites, including particle sizes of catalysts, Fe content, and Fe-N bond structures.