Photocatalytic selective oxidation of CO with O2 in the presence of H2 over highly dispersed chromium oxide on silica under visible or solar light irradiation

被引：0
|
作者：
Takashi Kamegawa
Masaya Matsuoka
Masakazu Anpo
机构：
[1] Osaka Prefecture University,Department of Applied Chemistry, Graduate School of Engineering
来源：
Research on Chemical Intermediates | 2008年 / 34卷
关键词：
Cr/SiO; photocatalyst; selective oxidation of CO in H; photoluminescence;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A highly dispersed Cr6+-oxide species on silica (Cr/SiO2) was found to act as an efficient photocatalyst for the selective oxidation of CO into CO2 with O2 in the presence of H2 under visible (λ>420 nm) or solar light irradiation at 293 K. UV-Vis, photoluminescence and FT-IR investigations revealed that the selective reactivity of the photoexcited tetrahedral Cr6+-oxide species ([Cr5+−O−]*) with CO, as well as the high reactivity of the photoreduced Cr6+-oxide species (Cr4+-oxide species) with O2 both play significant roles in this reaction.
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页码：427 / 434
页数：7
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