Pulsed electroreduction of CO[sub 2] on copper electrodes-II
- Kyushu Inst. of Tech., Kitakyushu (Japan). Dept. of Electrical Engineering
The pulsed method newly developed by the present authors was applied to electroreduction of CO[sub 2] on Cu electrodes. It was found that the optimum cathodic bias for generating CH[sub 4] and C[sub 2]H[sub 4] was [minus]2.6 V vs. SCE, and the optimum anodic bias for the generation of C[sub 2]H[sub 4] was slightly more anodic than that of CH[sub 4]. Total faradaic efficiency [eta][sub HC] for the generation of CH[sub 4] and C[sub 2]H[sub 4] became a maximum at 10 C and reached about 655. Furthermore, [eta][sub HC] increased with increasing reduction time due to the poisoning effect of the products. It was proposed that some surface intermediate formed by the interaction between CO[sub 2] and the thin oxide layer on a Cu electrode is finally reduced to CH[sub 4] or C[sub 2]H[sub 4], depending on the anodic reactions taking place during the anodic period.
- OSTI ID:
- 7202870
- Journal Information:
- Journal of the Electrochemical Society; (United States), Journal Name: Journal of the Electrochemical Society; (United States) Vol. 141:5; ISSN 0013-4651; ISSN JESOAN
- Country of Publication:
- United States
- Language:
- English
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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400 -- Electrochemistry
ALKANES
ALKENES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CATALYTIC EFFECTS
CHALCOGENIDES
COPPER
DATA
ELECTROLYSIS
ELEMENTS
ETHYLENE
EXPERIMENTAL DATA
HYDROCARBONS
INFORMATION
LYSIS
METALS
METHANE
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
REACTION INTERMEDIATES
SYNTHESIS
TRANSITION ELEMENTS