Zinc Single-Atom Nanozyme As Carbonic Anhydrase Mimic for CO₂ Capture and Conversion.

ABSTRACT: Single-atom nanozymes (SANs) are a class of nanozymes with metal centers that mimic the structure of metalloenzymes. Herein, we report the synthesis of Zn-N-C SAN, which mimics the action of the natural carbonic anhydrase enzyme. The two-step annealing technique led to a metal content of more than 18 wt %. Since the metal centers act as active sites, this high metal loading resulted in superior catalytic activity. Zn-SAN showed a CO₂ uptake of 2.3 mmol/g and a final conversion of CO₂ to bicarbonate of more than 91%. CO₂ was converted via a biomimetic process by allowing its adsorption by the catalyst, followed by the addition of the catalyst to HEPES buffer (pH = 8) to start the CO₂ conversion into HCO₃ ^-. Afterward, CaCl

SUBMITTER: Hamed EM 

PROVIDER: S-EPMC11907284 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature