Photo-enhanced reduction of carbon dioxide with hydrogen over Rh/TiO2

被引：110

作者：

Kohno, Y ^{[1
]}

Hayashi, H ^{[1
]}

Takenaka, S ^{[1
]}

Tanaka, T ^{[1
]}

Funabiki, T ^{[1
]}

Yoshida, S ^{[1
]}

机构：

[1] Kyoto Univ, Grad Sch Engn, Dept Mol Engn, Kyoto 6068501, Japan

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 1999年 / 126卷 / 1-3期

关键词：

photoreduction; carbon dioxide; titanium dioxide; rhodium; X-ray absorption spectroscopy;

D O I：

10.1016/S1010-6030(99)00113-6

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：

Photoreduction of gaseous carbon dioxide to carbon monoxide with hydrogen over Rh-loading TiO2 was investigated. As the reaction proceeded even in the dark but was enhanced under irradiation, the reaction should be considered as "photo-enhanced reaction". When Rh in Rh/TiO2 was strongly reduced to be in a fully metallic state, the activity was lowered and the main product changed from CO to CH4. A similar effect was obtained by changing the loading amount of Rh: when the loading amount of Rh was raised, the activity was lowered and the main product shifted from CO to CH4. The results of an X-ray absorption spectroscopic analysis showed that the ratio of Rh in a metallic state to that in an oxidized stale increased along with the increase of the amount of Rh loading on Rh/TiO2. The photocatalytic activity was higher as Rh was richer in the component of metallic and oxidized state. (C) 1999 Elsevier Science S.A. All rights reserved.

引用

页码：117 / 123

页数：7

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