1991 Fiscal Year Final Research Report Summary
Development of the system of selective alcohol production from carbon dioxide
| Project/Area Number |
02805107
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
Synthetic chemistry
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| Research Institution | The University of Tokyo |
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Principal Investigator |
HASHIMOTO Kazuhito The University of Tokyo, Fac. Engineer., Associate Professor, 工学部, 助教授 (00172859)
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| Co-Investigator(Kenkyū-buntansha) |
KATO Takashi The University of Tokyo, Inst. of Ind. Sci., Assistant Professor, 生産技術研究所, 講師 (70214377)
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| Project Period (FY) |
1990 – 1991
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| Keywords | carbon dioxide / Alcohol / Compound Semiconductor / Hydrogen absorbing electrode / Surface design |
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| Research Abstract |
The photoelectrochemical reduction of CO_2 has been examined on the amorphous p-SiC thin film electrode, prepared by Mercury sensitized Photo-CVD, in aqueous electrolytes at room temperature. Although 80% of the photocurrent was used for reduction of proton(hydrogen production), Methanol was selectively obtained as the CO_2 reduction product with a current efficiency of up to 18% at -1.5V vs SCE. Small quantities of CO and CH_4 were also obtained.
The electrochemical Carbon dioxide reduction was also c. -)ne using one of the hydrogen-storing materials, Pd. The faradaic efficiencies for CO and HCOOH production increased after hydrogen was absorbed into the Pd electrode. This was due to the increase of the electivity for CO_2 reduction resulting from suppression of hydrogen production and/or the increase of actual reaction rates for CO and HCOOH production.
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