skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Hydrogen and methoxy coadsorption in the computation of the catalytic conversion of methanol on the ceria (111) surface

Journal Article · · Surface Science
 [1]
  1. Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Methanol decomposition to formaldehyde catalyzed by the ceria (111) surface has been investigated using the DFT + U method. Our results rationalize experimental temperature programmed desorption experiments on the fully oxidized surface. Particular attention has been paid to the model correctness of methoxy with coadsorbed hydrogen on the surface. This issue has been raised by the experimental observation of water desorption at low temperature removing hydrogen from the system. Our investigation also includes hydrogen diffusion as a means of hydrogen removal. We find that the presence of methoxy reduces the reaction energy for water formation considerably. In addition, the preference of the electron to locate at the methoxy oxygen results in a dehydrated surface that does not contain Ce3+ ions, despite the existence of a vacancy.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1238739
Alternate ID(s):
OSTI ID: 1251758
Journal Information:
Surface Science, Vol. 648, Issue C; ISSN 0039-6028
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 8 works
Citation information provided by
Web of Science

References (48)

Ceria-Based Solid Catalysts for Organic Chemistry journal May 2010
Development of Low Temperature Three-Way Catalysts for Future Fuel Efficient Vehicles journal January 2015
Understanding the Role of Oxygen Vacancies in the Water Gas Shift Reaction on Ceria-Supported Platinum Catalysts journal April 2014
Controlled synthesis and assembly of ceria-based nanomaterials journal July 2009
Surface structure dependence of selective oxidation of ethanol on faceted CeO2 nanocrystals journal October 2013
Variations in Reactivity on Different Crystallographic Orientations of Cerium Oxide journal July 2013
The surface chemistry of cerium oxide journal March 2015
Probing the Surface Sites of CeO 2 Nanocrystals with Well-Defined Surface Planes via Methanol Adsorption and Desorption journal September 2012
Adsorption and dissociation of methanol on the fully oxidized and partially reduced (111) cerium oxide surface: Dependence on the configuration of the cerium 4f electrons journal January 2008
Pathways for Ethanol Dehydrogenation and Dehydration Catalyzed by Ceria (111) and (100) Surfaces journal January 2015
Oxygen Defects and Surface Chemistry of Ceria: Quantum Chemical Studies Compared to Experiment journal December 2012
Methanol Adsorption on the Clean CeO 2 (111) Surface:  A Density Functional Theory Study journal July 2007
Density Functional Theory Study of Methanol Decomposition on the CeO 2 (110) Surface journal February 2008
Reactions of Methanol with Pristine and Defective Ceria (111) Surfaces: A Comparison of Density Functionals journal October 2014
Unraveling the structure sensitivity in methanol conversion on CeO2: A DFT+U study journal July 2015
Support Effect in Oxide Catalysis: Methanol Oxidation on Vanadia/Ceria journal October 2014
A density functional theory study of formaldehyde adsorption on ceria journal November 2007
A density functional theory study of formaldehyde adsorption and oxidation on CeO2(111) surface journal January 2010
Isopropanol oxidation by pure metal oxide catalysts: number of active surface sites and turnover frequencies journal November 2002
Adsorption and Reaction of C 1 −C 3 Alcohols over CeO X (111) Thin Films journal July 2010
Adsorption and reaction of methanol on thin-film cerium oxide journal April 2006
Interaction of Methanol with Well-Defined Ceria Surfaces:  Reflection/Absorption Infrared Spectroscopy, X-ray Photoelectron Spectroscopy, and Temperature-Programmed Desorption Study journal August 1999
Structure Sensitivity of the Reaction of Methanol on Ceria journal April 2001
Water Adsorption and Its Effect on the Stability of Low Index Stoichiometric and Reduced Surfaces of Ceria journal March 2012
Role of oxygen vacancies in the surface evolution of H at CeO 2 (111): a charge modification effect journal January 2015
First-Principles Assessment of H 2 S and H 2 O Reaction Mechanisms and the Subsequent Hydrogen Absorption on the CeO 2 (111) Surface journal November 2011
Hydrogen Cycle on CeO 2 (111) Surfaces:  Density Functional Theory Calculations journal October 2007
Projector augmented-wave method journal December 1994
From ultrasoft pseudopotentials to the projector augmented-wave method journal January 1999
Ab initiomolecular dynamics for liquid metals journal January 1993
Ab initio molecular-dynamics simulation of the liquid-metal–amorphous-semiconductor transition in germanium journal May 1994
Efficiency of ab-initio total energy calculations for metals and semiconductors using a plane-wave basis set journal July 1996
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set journal October 1996
Generalized Gradient Approximation Made Simple journal October 1996
Electron-energy-loss spectra and the structural stability of nickel oxide: An LSDA+U study journal January 1998
CO Adsorption and Oxidation on Ceria Surfaces from DFT+U Calculations journal May 2008
First-principles LDA + U and GGA + U study of cerium oxides: Dependence on the effective U parameter journal January 2007
Oxygen Vacancy-Assisted Coupling and Enolization of Acetaldehyde on CeO 2 (111) journal October 2012
Tuning LDA+U for electron localization and structure at oxygen vacancies in ceria journal December 2007
Insight into the Adsorption of Water on the Clean CeO 2 (111) Surface with van der Waals and Hybrid Density Functionals journal June 2012
A consistent and accurate ab initio parametrization of density functional dispersion correction (DFT-D) for the 94 elements H-Pu journal April 2010
A climbing image nudged elastic band method for finding saddle points and minimum energy paths journal December 2000
Evidence for Subsurface Ordering of Oxygen Vacancies on the Reduced CeO 2 ( 111 ) Surface Using Density-Functional and Statistical Calculations journal June 2013
Improved grid-based algorithm for Bader charge allocation journal January 2007
A fast and robust algorithm for Bader decomposition of charge density journal June 2006
Adsorption and reaction of formaldehyde on thin-film cerium oxide journal April 2006
Thermal desorption of gases journal July 1962
Hydrogen activation, diffusion, and clustering on CeO 2 (111): A DFT+ U study journal July 2014