Elucidating the catalytic mechanism of Prussian blue nanozymes with self-increasing catalytic activity.
Nat Commun
; 15(1): 5908, 2024 Jul 13.
Article
em En
| MEDLINE
| ID: mdl-39003316
ABSTRACT
Although Prussian blue nanozymes (PBNZ) are widely applied in various fields, their catalytic mechanisms remain elusive. Here, we investigate the long-term catalytic performance of PBNZ as peroxidase (POD) and catalase (CAT) mimetics to elucidate their lifespan and underlying mechanisms. Unlike our previously reported Fe3O4 nanozymes, which exhibit depletable POD-like activity, the POD and CAT-like activities of PBNZ not only persist but slightly enhance over prolonged catalysis. We demonstrate that the irreversible oxidation of PBNZ significantly promotes catalysis, leading to self-increasing catalytic activities. The catalytic process of the pre-oxidized PBNZ can be initiated through either the conduction band pathway or the valence band pathway. In summary, we reveal that PBNZ follows a dual-path electron transfer mechanism during the POD and CAT-like catalysis, offering the advantage of a long service life.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Oxirredução
/
Catalase
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Peroxidase
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Ferrocianetos
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article