Electrocatalytic formation of CH{sub 4} from CO{sub 2} on a Pt gas diffusion electrode
- Tokyo Inst. of Tech., Yokohama (Japan)
Electrochemical reduction of CO{sub 2} under high pressure (<50 atm) on a Pt gas diffusion electrode (Pt-GDE) was studied. When the Pt catalyst layer was directed toward the CO{sub 2} gas phase (the reverse arrangement), methane was produced as the main CO{sub 2} reduction product at high faradaic efficiency and at large partial current density. Ethanol, ethylene, ethane, carbon monoxide, and formic acid were also produced. The effects of the Pt catalyst, electrode arrangement, CO{sub 2} pressure, reaction temperature, and hydrogen pretreatment of the electrode were investigated for this electrocatalytic reaction. Faradaic efficiencies of the formation of CO{sub 2} reduction products such as methane, carbon monoxide, and formic acid depended significantly on the CO{sub 2} pressure and temperature. The yield of CO{sub 2} reduction products was increased by hydrogen pretreatment of the Pt-gas diffusion electrode.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 465100
- Journal Information:
- Journal of the Electrochemical Society, Vol. 144, Issue 2; Other Information: PBD: Feb 1997
- Country of Publication:
- United States
- Language:
- English
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