Gas-Phase Oxidation of Alcohols with Dioxygen over an Au/TiO2 Catalyst: The Role of Reactive Oxygen Species

被引：2

作者：

Sobolev, V. I. ^{[1
,2
]}

Koltunov, K. Yu ^{[1
,3
]}

机构：

[1] Russian Acad Sci, Siberian Branch, Boreskov Inst Catalysis, Novosibirsk 630090, Russia

[2] Tomsk State Univ, Tomsk 634050, Russia

[3] Novosibirsk State Univ, Novosibirsk 630090, Russia

来源：

KINETICS AND CATALYSIS | 2015年 / 56卷 / 03期

关键词：

SELECTIVE OXIDATION; ETHANOL; EPOXIDATION; PROPYLENE; EFFICIENT; VANADIUM; CO/O-2;

D O I：

10.1134/S0023158415030192

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：

The activity of the (3% Au)/TiO2 catalyst with an average gold particle size of 3.6 +/- 1.0 nm in the gas-phase oxidation of lower aliphatic alcohols (ethanol, propanol, isopropanol, and butanol) into the corresponding carbonyl compounds (acetaldehyde, propanal, acetone, and butanal) has been studied. A two-peak profile of the activity of the catalyst as a function of temperature has been observed in all of the reactions. The first peak falls within the temperature range from 120 to 130 degrees C, while the complete conversion of the alcohols is achieved at 200-300 degrees C. It is hypothesized that the low-temperature activity is due to the generation of a thermally unstable reactive oxygen species on the catalyst surface.

引用

页码：343 / 346

页数：4

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