1991 Fiscal Year Final Research Report Summary
Photoelectrochemical Fixation of carbon dioxide by metal complexes
| Project/Area Number |
02805092
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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 |
無機工業化学・無機材料工学
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| Research Institution | Mie University |
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Principal Investigator |
MIZUNO Takayuki Mie Univ., Chemistry for Materials, Prof., 工学部, 教授 (80200012)
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| Co-Investigator(Kenkyū-buntansha) |
OHTA Kiyohisa Mie Univ., Chem. for Materials, Ass. Prof., 工学部, 助教授 (50024609)
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| Project Period (FY) |
1990 – 1991
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| Keywords | Carbon diooxide / Reductive Fixation / Mediated electrode / Non-aqueous Solvent / Liquid carbon dioxide |
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| Research Abstract |
1. Object : In this report, we study on electrochemical reduction of CO_2 with mediated electrodes in aqueous solutions and with a copper electrode in non-aqueous solvents and liquid CO_2, aiming at search for suggestion as to efficient reduction process of CO_2.
2. Resuts
(1) Formation of methanol with a mediated electrode : We found Hexacyanoruthenium was effective as a mediator for reduction of CO_2 to methanol, in studying electrochemical reduction performance of hexacyanates mediator. Ferrous complex of Tiron, Nitroso-R salt and O-phenanthroline were effective as a catalyser of the reduction.
(2) Electrochemical reduction in non-aqueous electrolytes : In amine solutions which are used as a separating solvent of CO_2 from flue gas, CO_<> were not reduced electrochemically, because amines combine with CO_2 to form a compound. Secondly we sdudied on methanol which is used also as one of the solvent. In the case of methanol with small amount of water, CO_2 was electrochemically reduced to form CO, H_2, CH_2CH_2 and CH_4 in the order of their magnitude.
(3) Reduction in liquid CO_2 : We found electrochemical reduction occurred in liguid CO_2 solution containing methanol with Benzalkonium Chloride. Reduction products were H_2, CH_4 and CO in the order of their magnitude.
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