Catalytic Oxidation of Methanol to Formaldehyde by Mass-Selected Vanadium Oxide Clusters Supported on a TiO2(110) Surface

被引：19

作者：

Price, Scott P. ^{[1
]}

Tong, Xiao ^{[1
]}

Ridge, Claron ^{[1
]}

Neilson, Hunter L. ^{[1
]}

Buffon, Joshua W. ^{[1
]}

Robins, Jeremy ^{[1
]}

Metiu, Horia ^{[1
]}

Bowers, Michael T. ^{[1
]}

Buratto, Steven K. ^{[1
]}

机构：

[1] Univ Calif Santa Barbara, Dept Chem & Biochem, Santa Barbara, CA 93106 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY A | 2014年 / 118卷 / 37期

基金：

美国国家科学基金会;

关键词：

RUTILE TIO2(110); REACTIVITY; OXYGEN; DEPOSITION; CHEMISTRY; SCIENCE; FILMS;

D O I：

10.1021/jp5011378

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：

We report the results of a systematic study of the catalytic activity of mass-selected vanadium oxide dusters deposited on rutile TiO2 surfaces under ultrahigh vacuum (UHV) conditions. Our results show that supported V. VO, and VO2 clusters are not catalytically active for the oxidative dehydrogenation of methanol to formaldehyde but can be made catalytically active by postoxidation. In addition, we found that the postoxidized VO/TiO2 produces the most formaldehyde. Scanning tunneling microscopy (STM) imaging of the postoxidized VO/TiO2 reveals isolated dusters with height and width indicative of VO3 bound to the TiO2 surface. Our results are consistent with previous density functional theory (DFT) calculations that predict that VO3 will be produced by postoxidation of VO and that VO3/TiO2 is an active catalyst.

引用

页码：8309 / 8313

页数：5

共 24 条

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