Reactivity and reaction intermediates for acetic acid adsorbed on CeO2(111)
Journal Article
·
· Catalysis Today
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Louisiana State Univ., Baton Rouge, LA (United States)
Adsorption and reaction of acetic acid on a CeO2(1 1 1) surface was studied by a combination of ultra-highvacuum based methods including temperature desorption spectroscopy (TPD), soft X-ray photoelectronspectroscopy (sXPS), near edge X-ray absorption spectroscopy (NEXAFS) and reflection absorption IRspectroscopy (RAIRS), together with density functional theory (DFT) calculations. TPD shows that thedesorption products are strongly dependent upon the initial oxidation state of the CeO2 surface, includingselectivity between acetone and acetaldehyde products. The combination of sXPS and NEXAFS demon-strate that acetate forms upon adsorption at low temperature and is stable to above 500 K, above whichpoint ketene, acetone and acetic acid desorb. Furthermore, DFT and RAIRS show that below 500 K, bridge bondedacetate coexists with a moiety formed by adsorption of an acetate at an oxygen vacancy, formed bywater desorption.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE; USDOE Office of Science (SC)
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1185988
- Alternate ID(s):
- OSTI ID: 1229315
OSTI ID: 1251819
- Journal Information:
- Catalysis Today, Journal Name: Catalysis Today Vol. 253; ISSN 0920-5861
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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