Photocatalytic CO oxidation with water over Pt/TiO2 catalysts

被引：21

作者：

Czupryn, Krzysztof ^{[1
]}

Kocemba, Ireneusz ^{[1
]}

Rynkowski, Jacek ^{[1
]}

机构：

[1] Lodz Univ Technol, Inst Gen & Ecol Chem, Zeromskiego 116, PL-90924 Lodz, Poland

来源：

REACTION KINETICS MECHANISMS AND CATALYSIS | 2018年 / 124卷 / 01期

关键词：

CO photooxidation; Water gas shift reaction; WGSR; Photocatalysis; METAL-SUPPORT INTERACTION; GAS SHIFT REACTION; PLATINUM SURFACES; TIO2; REDUCTION; DISSOCIATION; OXIDES; AU;

D O I：

10.1007/s11144-017-1334-4

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：

This paper reports that Pt/TiO2 and to some extent, Pt/Al2O3 and Pt/SiO2 catalysts show some activity in the photocatalytic oxidation of CO by water at low temperature (< 100 A degrees C) in the absence of oxygen. For Pt/TiO2 catalysts, CO conversion is dependent on the Pt loading as well as the temperature of their reduction. There are an optimal platinum loading (5 wt%) and catalyst reduction temperature (500 A degrees C) ensuring the best photocatalytic efficiency. Catalytic performance results from the combined effects of electron-hole photogeneration and partial photodesorption of CO from the platinum surface, followed by the adsorption and subsequent dissociation of H2O. The probable mechanism of photooxidation of CO by H2O was proposed.

引用

页码：187 / 201

页数：15

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