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Title: Adsorption and Reaction of Methanol on Thin-film Cerium Oxide

Abstract

Formaldehyde adsorption and reaction have been studied on cerium oxide thin films that were vapor deposited on Ru(0 0 0 1). The formaldehyde behavior was examined as a function of temperature, exposure and Ce oxidation state. Formaldehyde chemisorbs on fully oxidized CeO{sub 2} as dioxymethylene, CH{sub 2}O{sub 2}. The dioxymethylene decomposes and desorbs as formaldehyde between 200 K and 400 K. No other products are formed. On reduced ceria, formaldehyde also adsorbs as dioxymethylene. In addition to the formaldehyde desorption between 200 K and 400 K, a more strongly bound form of dioxymethylene is formed that produces formaldehyde at 440 K. Above 400 K, some of the dioxymethylene reacts to form formate and methoxy on the surface. These species decompose to produce H{sub 2}, CO and CH{sub 2}O above 500 K.

Authors:
; ;
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL) National Synchrotron Light Source
Sponsoring Org.:
Doe - Office Of Science
OSTI Identifier:
913977
Report Number(s):
BNL-78545-2007-JA
Journal ID: ISSN 0039-6028; SUSCAS; TRN: US0801444
DOE Contract Number:
DE-AC02-98CH10886
Resource Type:
Journal Article
Resource Relation:
Journal Name: Surf. Sci.; Journal Volume: 600
Country of Publication:
United States
Language:
English
Subject:
10 SYNTHETIC FUELS; 43 PARTICLE ACCELERATORS; ADSORPTION; CERIUM OXIDES; DESORPTION; FORMALDEHYDE; FORMATES; METHANOL; THIN FILMS; NSLS; national synchrotron light source

Citation Formats

Mullins,D., Robbins, M., and Zhou, J.. Adsorption and Reaction of Methanol on Thin-film Cerium Oxide. United States: N. p., 2006. Web. doi:10.1016/j.susc.2006.02.011.
Mullins,D., Robbins, M., & Zhou, J.. Adsorption and Reaction of Methanol on Thin-film Cerium Oxide. United States. doi:10.1016/j.susc.2006.02.011.
Mullins,D., Robbins, M., and Zhou, J.. Sun . "Adsorption and Reaction of Methanol on Thin-film Cerium Oxide". United States. doi:10.1016/j.susc.2006.02.011.
@article{osti_913977,
title = {Adsorption and Reaction of Methanol on Thin-film Cerium Oxide},
author = {Mullins,D. and Robbins, M. and Zhou, J.},
abstractNote = {Formaldehyde adsorption and reaction have been studied on cerium oxide thin films that were vapor deposited on Ru(0 0 0 1). The formaldehyde behavior was examined as a function of temperature, exposure and Ce oxidation state. Formaldehyde chemisorbs on fully oxidized CeO{sub 2} as dioxymethylene, CH{sub 2}O{sub 2}. The dioxymethylene decomposes and desorbs as formaldehyde between 200 K and 400 K. No other products are formed. On reduced ceria, formaldehyde also adsorbs as dioxymethylene. In addition to the formaldehyde desorption between 200 K and 400 K, a more strongly bound form of dioxymethylene is formed that produces formaldehyde at 440 K. Above 400 K, some of the dioxymethylene reacts to form formate and methoxy on the surface. These species decompose to produce H{sub 2}, CO and CH{sub 2}O above 500 K.},
doi = {10.1016/j.susc.2006.02.011},
journal = {Surf. Sci.},
number = ,
volume = 600,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 2006},
month = {Sun Jan 01 00:00:00 EST 2006}
}