Effect of TiO2 crystalline phase on CO oxidation over CuO catalysts supported on TiO2

被引：57

作者：

Kang, Mi Yeong ^{[1
]}

Yun, Hyeong Jin ^{[1
]}

Yu, Sungju ^{[1
]}

Kim, Wooyoung ^{[1
]}

Kim, Nam Dong ^{[1
]}

Yi, Jongheop ^{[1
]}

机构：

[1] Seoul Natl Univ, World Class Univ WCU Program Chem Convergence Ene, Inst Chem Proc, Sch Chem & Biol Engn,Coll Engn, Seoul 151742, South Korea

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2013年 / 368卷

基金：

新加坡国家研究基金会;

关键词：

Anatase; Rutile; TiO2; CuO; CO oxidation; PHOTOCATALYTIC ACTIVITY; TEMPERATURE; ANATASE; RUTILE; SIZE; PERFORMANCE; NANOFIBER; PD/TIO2; SURFACE; SITES;

D O I：

10.1016/j.molcata.2012.11.021

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：

CuO catalysts supported on TiO2 with various compositions of anatase and rutile phase (CuO/R, CuOR7A3, CuOR3A7 and CuO/A) are prepared by a deposition-precipitation procedure, and products are characterized using EPR, TPR, and XPS. The oxidation of CO is used as a model reaction case to test for catalytic activity. Importantly, the type of TiO2 phase present has an effect on the physical, chemical, and catalytic properties of the CuO catalysts. The rutile phase of the TiO2 support (CuO/R) interacts weakly with the CuO and TiO2 support. Cu2+ ions in the supported-CuO are readily reduced to Cu-0 during the CO oxidation reaction. Consequently, CuO/R provides large amounts of oxygen atoms for reaction with CO, which results in the highest catalytic activity among the catalysts examined. The activities of supported CuO catalysts decrease gradually with the decrease in amounts of rutile phase. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：72 / 77

页数：6

共 35 条

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