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Encapsulation of multiple enzymes in a metal–organic framework with enhanced electro-enzymatic reduction of CO2 to methanol.
- Source :
- Green Chemistry; 3/21/2021, Vol. 23 Issue 6, p2362-2371, 10p
- Publication Year :
- 2021
-
Abstract
- Efficient enzymatic conversion of CO<subscript>2</subscript> to methanol is limited by low CO<subscript>2</subscript> solubility in water (33 mM), and the high-cost of the cofactor (NADH) hinders the potential large-scale application of CO<subscript>2</subscript> enzymatic conversion. In this study, a bioelectrocatalytic system was established for tackling both these issues, and in this system enzymes were embedded in the metal–organic framework ZIF-8 via in situ encapsulation to increase the substrate (CO<subscript>2</subscript>) concentration and pre-concentrate NADH, and a Rh complex-grafted electrode was developed for regenerating NADH in a sustainable manner. The results showed that after encapsulation of enzymes in ZIF-8, the methanol concentration increased from 0.061 to 0.320 mM (5 fold) in three hours. Furthermore, after coupling with electrocatalytic NADH regeneration, the methanol concentration further increased to 0.742 mM (12 fold) compared to a free enzyme system. Overall, methanol was produced at a rate of 822 μmol g<superscript>−1</superscript> h<superscript>−1</superscript>. [ABSTRACT FROM AUTHOR]
- Subjects :
- METAL-organic frameworks
METHANOL
ENZYMES
NAD (Coenzyme)
DIAZONIUM compounds
Subjects
Details
- Language :
- English
- ISSN :
- 14639262
- Volume :
- 23
- Issue :
- 6
- Database :
- Complementary Index
- Journal :
- Green Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 149531744
- Full Text :
- https://doi.org/10.1039/d1gc00241d