Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 114, Issue 47, Pages 20000-20006Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp104629j
Keywords
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Funding
- Division of Chemical Sciences, Geosciences, and Biosciences, Office of Basic Energy Sciences, U.S. Department of Energy [DE-AC05-00OR22725, DE-FG02-86ER13622.A000]
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-98CH10886]
- Oak Ridge National Laboratory
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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.
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