PHOTOSENSITIZED REDUCTION OF CARBON-DIOXIDE IN SOLUTION USING NOBLE-METAL CLUSTERS FOR ELECTRON-TRANSFER

被引：16

作者：

TOSHIMA, N

YAMAJI, Y

TERANISHI, T

YONEZAWA, T

机构：

[1] Department of Applied Chemistry, Faculty of Engineering, The University of Tokyo, Hongo, Bunkyo-ku

来源：

ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES | 1995年 / 50卷 / 2-3期

关键词：

CARBON DIOXIDE; PHOTOSENSITIZED REDUCTION; ELECTRON TRANSFER; METAL CLUSTER; COLLOIDAL CATALYST;

D O I：

10.1515/zna-1995-2-321

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Carbon dioxide was reduced to methane by visible-light irradiation of a solution composed of tris(bipyridine)ruthenium(III) as photosensitizer, ethylenediaminetetraacetic acid disodium salt as sacrificial reagent, methyl viologen as electron relay, and a colloidal dispersion of polymer-protected noble-metal clusters, prepared by alcohol-reduction, as catalyst. Among the noble-metal clusters examined, Pt clusters showed the highest activity for the formation of methane as well as hydrogen. In order to improve the activity, oxidized clusters and bimetallic clusters were also applied. For example, the CH4 yield in 3-h irradiation increased from 51 x 10(-3) mu mol with unoxidized Pt clusters to 72 x 10(-3) mu mol with partially oxidized ones. In the case of Pt/Ru bimetalic systems, the improvement of the catalytic activity by air treatment was much greater than in case of monometallic clusters.

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页码：283 / 291

页数：9

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