Boosting the performance of single-atom catalysts via external electric field polarization.
Nat Commun
; 13(1): 3063, 2022 06 02.
Article
em En
| MEDLINE
| ID: mdl-35654804
ABSTRACT
Single-atom catalysts represent a unique catalytic system with high atomic utilization and tunable reaction pathway. Despite current successes in their optimization and tailoring through structural and synthetic innovations, there is a lack of dynamic modulation approach for the single-atom catalysis. Inspired by the electrostatic interaction within specific natural enzymes, here we show the performance of model single-atom catalysts anchored on two-dimensional atomic crystals can be systematically and efficiently tuned by oriented external electric fields. Superior electrocatalytic performance have been achieved in single-atom catalysts under electrostatic modulations. Theoretical investigations suggest a universal "onsite electrostatic polarization" mechanism, in which electrostatic fields significantly polarize charge distributions at the single-atom sites and alter the kinetics of the rate determining steps, leading to boosted reaction performances. Such field-induced on-site polarization offers a unique strategy for simulating the catalytic processes in natural enzyme systems with quantitative, precise and dynamic external electric fields.
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1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Eletricidade
Idioma:
En
Revista:
Nat Commun
Ano de publicação:
2022
Tipo de documento:
Article