Cited 48 time in webofscience Cited 52 time in scopus

Energy efficient electrochemical reduction of CO2 to CO using a three-dimensional porphyrin/graphene hydrogel

Title
Energy efficient electrochemical reduction of CO2 to CO using a three-dimensional porphyrin/graphene hydrogel
Authors
Choi, JaecheolKim, JeonghunWagner, PawelGambhir, SanjeevJalili, RouhollahByun, SeoungwooSayyar, SepidarLee, Yong MinMacFarlane, Douglas R.Wallace, Gordon G.Officer, David L.
DGIST Authors
Lee, Yong Min
Issue Date
2019-02
Citation
Energy and Environmental Sciences, 12(2), 747-755
Type
Article
Article Type
Article
Keywords
CO2-TO-CO CONVERSIONGRAPHENEIMMOBILIZATIONDISPERSIONSPORPHYRINSCATALYSISNITROGENWATER
ISSN
1754-5692
Abstract
Although electrochemical CO 2 reduction is one of the most promising ways to convert atmospheric CO 2 into value-added chemicals, there are still numerous limitations to overcome to achieve highly efficient CO 2 conversion performance. Herein, we report for the first time the development and use of a three-dimensional iron porphyrin-based graphene hydrogel (FePGH) as an electrocatalyst for extremely efficient robust CO 2 reduction to CO. Electrocatalytic CO 2 conversion was performed in aqueous medium with FePGH, which has a highly porous and conductive 3D graphene structure, resulting in high catalytic activity for CO production with ∼96.2% faradaic efficiency at a very low overpotential of 280 mV. Furthermore, FePGH showed considerable catalytic durability maintaining a consistent CO yield (96.4% FE) over 20 h electrolysis at the same overpotential, corresponding to the highest cathodic energy efficiency yet observed of 79.7% compared to other state-of-the-art immobilised metal complex electrocatalysts. This approach to fabricating a 3D graphene-based hydrogel electrocatalyst should provide an exciting new avenue for the development of other kinds of molecular electrocatalysts. © 2019 The Royal Society of Chemistry.
URI
http://hdl.handle.net/20.500.11750/9635
DOI
10.1039/c8ee03403f
Publisher
Royal Society of Chemistry
Related Researcher
  • Author Lee, Yong Min Battery Materials & Systems LAB
  • Research Interests Battery; Electrode; Electrolyte; Separator; Simulation
Files:
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Collection:
Department of Energy Science and EngineeringBattery Materials & Systems LAB1. Journal Articles


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