Reaction of Formic Acid over Amorphous Manganese Oxide Catalytic Systems: An In Situ Study

被引：50

作者：

Durand, Jason P. ^{[1
]}

Senanayake, Sanjaya D. ^{[2
]}

Suib, Steven L. ^{[1
,3
]}

Mullins, David R. ^{[2
]}

机构：

[1] Univ Connecticut, Dept Chem, Storrs, CT 06269 USA

[2] Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA

[3] Univ Connecticut, Inst Mat Sci, Storrs, CT 06269 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2010年 / 114卷 / 47期

关键词：

OCTAHEDRAL MOLECULAR-SIEVES; VIBRATIONAL-SPECTRA; PARTICLE-SIZE; OXIDATION; ALCOHOLS; FORMATE; DECOMPOSITION; SPECTROSCOPY; ADSORPTION; CHEMISTRY;

D O I：

10.1021/jp104629j

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 interaction of formic acid with amorphous manganese oxide (AMO) is investigated using in situ photoelectron and infrared spectroscopy techniques. Soft X-ray photoelectron spectroscopy (sXPS) and in situ FTIR illustrate two possible modes of formate bound species at the AMO surface. Two peaks in the IR region from 1340-1390 cm(-1) are indicative of formate species bound to the surface in a bidentate configuration. However, a 224 cm(-1) band gap between v(s)OCO and v(as)OCO suggests formate is bound in a bridging configuration. Temperature-programmed desorption studies confirm the formate bound species desorbs as carbon dioxide from the surface at multiple binding sites. At temperatures above 700 K, the presence of K+center dot center dot center dot OC complex suggests the bound species interacts at vacant sites related to framework oxygen and cation mobility.

引用

页码：20000 / 20006

页数：7

共 39 条

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