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Energy efficient electrochemical reduction of CO2 to CO using a three-dimensional porphyrin/graphene hydrogel
- Energy efficient electrochemical reduction of CO2 to CO using a three-dimensional porphyrin/graphene hydrogel
- Choi, Jaecheol; Kim, Jeonghun; Wagner, Pawel; Gambhir, Sanjeev; Jalili, Rouhollah; Byun, Seoungwoo; Sayyar, Sepidar; Lee, Yong Min; MacFarlane, Douglas R.; Wallace, Gordon G.; Officer, David L.
- DGIST Authors
- Lee, Yong Min
- Issue Date
- Energy and Environmental Sciences, 12(2), 747-755
- Article Type
- CO2-TO-CO CONVERSION; GRAPHENE; IMMOBILIZATION; DISPERSIONS; PORPHYRINS; CATALYSIS; NITROGEN; WATER
- 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.
- Royal Society of Chemistry
- Related Researcher
Lee, Yong Min
Battery Materials & Systems LAB
Battery; Electrode; Electrolyte; Separator; Simulation
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- Department of Energy Science and EngineeringBattery Materials & Systems LAB1. Journal Articles
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