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Title

Assembly of a Highly Efficient Molecular Device with (CNCbl)‐MWCNT/CP as Electrode for CO<sub>2</sub> Reduction Coupled to Water Oxidation.

Authors

Chen, Xuyang; Sun, Wenxuan; Meng, Xiangfen; Gao, Yan

Abstract

In this work, a novel molecular device was assembled with cyanocobalamin (CNCbl)‐MWCNT/CP as an electrode for CO2 reduction coupled to water oxidation. In the half cell of water oxidation, the electrode displayed a stable current density of more than 10 h, showing excellent electrocatalytic stability of CNCbl‐MWCNT/CP. For only CO2 reduction, the electrode displayed a turnover number (TONCO) and turnover frequency (TOFCO) of 295390 and 8.2 s−1, respectively, and excellent Faradaic efficiency (FECO) of 96 % at −1.0 V vs. RHE. When using (CNCbl)‐MWCNT/CP as a bifunctional electrode in a full‐cell system for 3 h at 2.7 V, the gas products were 63.89 μmol of CO, 2.42 μmol of H2, and 26.93 μmol of O2, showing a high FECO of ca. 92 %. The unique structural advantages of CNCbl could improve electrocatalytic CO2 reduction and water oxidation.

Subjects

OXIDATION of water; ELECTROLYTIC reduction; ELECTRODES; TURNOVER frequency (Catalysis); OXIDATION; VITAMIN B12; CARBON dioxide; CATHODIC protection

Publication

ChemElectroChem, 2021, Vol 8, Issue 18, p3567

ISSN

2196-0216

Publication type

Academic Journal

DOI

10.1002/celc.202100970

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