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Assembly of a Highly Efficient Molecular Device with (CNCbl)‐MWCNT/CP as Electrode for CO 2 Reduction Coupled to Water Oxidation
Author(s) -
Chen Xuyang,
Sun Wenxuan,
Meng Xiangfen,
Gao Yan
Publication year - 2021
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.202100970
Subject(s) - electrode , chemistry , redox , faraday efficiency , bifunctional , reduction potential , cobalt , inorganic chemistry , materials science , electrochemistry , chemical engineering , catalysis , organic chemistry , engineering
In this work, a novel molecular device was assembled with cyanocobalamin (CNCbl)‐MWCNT/CP as an electrode for CO 2 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 CO 2 reduction, the electrode displayed a turnover number (TON CO ) and turnover frequency (TOF CO ) of 295390 and 8.2 s −1 , respectively, and excellent Faradaic efficiency (FE CO ) 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 H 2, and 26.93 μmol of O 2 , showing a high FE CO of ca. 92 %. The unique structural advantages of CNCbl could improve electrocatalytic CO 2 reduction and water oxidation.