Ruthenium Single Atomic Sites Surrounding the Support Pit with Exceptional Photocatalytic Activity.
Angew Chem Int Ed Engl
; 63(21): e202400625, 2024 May 21.
Article
en En
| MEDLINE
| ID: mdl-38556897
ABSTRACT
Single-metal atomic sites and vacancies can accelerate the transfer of photogenerated electrons and enhance photocatalytic performance in photocatalysis. In this study, a series of nickel hydroxide nanoboards (Ni(OH)x NBs) with different loadings of single-atomic Ru sites (w-SA-Ru/Ni(OH)x) were synthesized via a photoreduction strategy. In such catalysts, single-atomic Ru sites are anchored to the vacancies surrounding the pits. Notably, the SA-Ru/Ni(OH)x with 0.60â
wt % Ru loading (0.60-SA-Ru/Ni(OH)x) exhibits the highest catalytic performance (27.6â
mmol g-1 h-1) during the photocatalytic reduction of CO2 (CO2RR). Either superfluous (0.64â
wt %, 18.9â
mmol g-1 h-1; 3.35â
wt %, 9.4â
mmol-1 h-1) or scarce (0.06â
wt %, 15.8â
mmol g-1 h-1; 0.29â
wt %, 21.95â
mmol g-1 h-1; 0.58â
wt %, 23.4â
mmol g-1 h-1) of Ru sites have negative effect on its catalytic properties. Density functional theory (DFT) calculations combined with experimental results revealed that CO2 can be adsorbed in the pits; single-atomic Ru sites can help with the conversion of as-adsorbed CO2 and lower the energy of *COOH formation accelerating the reaction; the excessive single-atomic Ru sites occupy vacancies that retard the completion of CO2RR.
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Colección:
01-internacional
Banco de datos:
MEDLINE
Idioma:
En
Revista:
Angew Chem Int Ed Engl
Año:
2024
Tipo del documento:
Article
País de afiliación:
China