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Progress of CO2 Electrochemical Methanation Using a Membrane Electrode Assembly.
- Source :
- Electrocatalysis; Jul2024, Vol. 15 Issue 4, p318-328, 11p
- Publication Year :
- 2024
-
Abstract
- CO<subscript>2</subscript> reduction and fixation are one of the most interesting topics in the fields of environmental electrochemistry and electrocatalysis. Many studies on CO<subscript>2</subscript> electroreduction using various metal electrodes have been reported. However, this reaction requires a high overpotential in general, which lowers the energy conversion efficiency and prevents its practical applications to reduce CO<subscript>2</subscript> emission to the atmosphere. The use of a membrane electrode assembly (MEA) is expected to be a breakthrough for the CO<subscript>2</subscript> electroreduction. Particularly, methanation (converting CO<subscript>2</subscript> into CH<subscript>4</subscript>) with MEAs incorporating Cu-based catalysts attracts special attention as a tool for carbon cycling, thanks to high faradaic efficiencies and relatively high energy conversion efficiencies. Different from Cu, Pt has long been recognized as an inactive catalyst for CO<subscript>2</subscript> reduction. Contrary to the common consensus, MEAs incorporating a Pt-based electrocatalyst were found very recently to be as active as Cu-based catalysts toward methanation under specific reaction conditions. The high activity of Pt arises from a reaction mechanism different from that for Cu; most likely the Langmuir–Hinshelwood mechanism for Pt and the Eley–Rideal mechanism for Cu. This mini-review discusses CO<subscript>2</subscript> electrochemical methanation using MEAs as a potential method for carbon capture. The CO<subscript>2</subscript> reduction to CH<subscript>4</subscript> using a H<subscript>2</subscript>-CO<subscript>2</subscript> fuel cell is also presented. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 18682529
- Volume :
- 15
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- Electrocatalysis
- Publication Type :
- Academic Journal
- Accession number :
- 177993790
- Full Text :
- https://doi.org/10.1007/s12678-024-00873-y