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Electrocatalytic Reduction of CO2 by Copper (II) Cyclam Derivatives

Title
Electrocatalytic Reduction of CO2 by Copper (II) Cyclam Derivatives
Authors
Kang, SJ[Kang, Sung-Jin]Dale, A[Dale, Ajit]Sarkar, S[Sarkar, Swarbhanu]Yoo, J[Yoo, Jeongsoo]Lee, H[Lee, Hochun]
DGIST Authors
Kang, SJ[Kang, Sung-Jin]; Lee, H[Lee, Hochun]
Issue Date
2015-09
Citation
Journal of Electrochemical Science and Technology, 6(3), 106-110
Type
Article
Article Type
Article
Keywords
Carbon Dioxide ReductionCopperCyclamCyclic VoltammetryElectrocatalyst
ISSN
2093-8551
Abstract
This study investigates Cu(II) complexes of cyclam, propylene cross-bridged cyclam (PCB-cyclam), and propylene crossbridged cyclam diacetate (PCB-TE2A) as homogeneous electrocatalysts for CO2 reduction in comparison with Ni(II)- cyclam. It is found that Cu(II)-cyclam can catalyze CO2 reduction at the potential close to its thermodynamic value (0.75 V vs. Ag/AgCl) in tris-HCl buffer (pH 8.45) on a glassy carbon electrode. Cu(II)-cyclam, however, suffers from severe demetalation due to the insufficient stability of Cu(I)-cyclam. Cu(II)-PCB-cyclam and Cu(II)-PCB-TE2A are revealed to exhibit much less demetalation behavior, but poor CO2 reduction activities as well. The inferior electrocatalytic ability of Cu(II)-PCB-cyclam is ascribed to its redox potential that is too high for CO2 reduction, and that of Cu(II)-PCB-TE2A to the steric hindrance preventing facile contact with CO2 molecules. This study suggests that in addition to the redox potential and chemical stability, the stereochemical aspect has to be considered in designing efficient electrocatalysts for CO2 reduction. © 2015, Korean Electrochemical Society. All rights reserved.
URI
http://hdl.handle.net/20.500.11750/2851
DOI
10.5229/JECST.2015.6.3.106
Publisher
Korean Electrochemical Society
Related Researcher
  • Author Lee, Ho Chun Electrochemistry Laboratory for Sustainable Energy(ELSE)
  • Research Interests Lithium-ion batteries; Novel Materials for rechargeable batteries; Novel energy conversion;storage systems; Electrochemistry; 리튬이차전지; 이차전지용 신규 전극 및 전해액; 신규 에너지변환 및 저장 시스템; 전기화학
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Collection:
Energy Science and EngineeringElectrochemistry Laboratory for Sustainable Energy(ELSE)1. Journal Articles


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