PHOTOCATALYTIC SYNTHESIS OF CH4 AND CH3OH FROM CO2 AND H2O ON HIGHLY DISPERSED ACTIVE TITANIUM-OXIDE CATALYSTS

被引：35

作者：

YAMASHITA, H

SHIGA, A

KAWASAKI, S

ICHIHASHI, Y

EHARA, S

ANPO, M

机构：

[1] Department of Applied Chemistry, University of Osaka Prefecture, Sakai, Osaka, 593

[2] Ion Engineering Research Institute Corporation, Tsuda, Hirakata, Osaka

来源：

ENERGY CONVERSION AND MANAGEMENT | 1995年 / 36卷 / 6-9期

关键词：

D O I：

10.1016/0196-8904(95)00081-N

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

UV-irradiation of the highly dispersed titanium oxide catalysts in the presence of CO2 and H2O at 275 K led to the formation of CH4, CH3OH, C-2-compounds, CO and O-2. The yields of the photocatalytic reaction strongly depended on the types of catalysts, the ratio of CO2/H2O and the reaction temperature. The photocatalytic reduction of CO2 with H2O is linked to the much higher reactivity of the charge transfer excited state, i.e., (Ti3+-O-)* of the tetrahedral coordinated titanium oxide species formed on the surfaces. Based on the detection of the reaction intermediate species such as Ti3+, H atoms, and C radicals, a molecular scale reaction mechanism has been proposed.

引用

页码：617 / 620

页数：4

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