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Title: Aqueous Phase Aldol Condensation of Formaldehyde and Acetone on Anatase TiO2(101) Surface: A Theoretical Investigation

Journal Article · · ChemCatChem

A mechanistic understanding of catalytic reactions at solid-liquid interface is limited both experimentally and theoretically but attracts much interest. Using density functional theory calculations (DFT) and ab initio molecular dynamics (AIMD) simulations, we investigated the effect of liquid water on a-H abstraction, C-C coupling, and dehydration steps of aldol condensation of formaldehyde and acetone on an anatase TiO2(101) surface. The existence of the aqueous phase lowered the Gibbs energy of activation of dehydration step pronouncedly from 187 to 74 kJ/mol through proton transfer mechanism, making the hydrogenation pathway more favorable in the aqueous phase. In contrast, a mixed route prevails in the vapor phase. This work provides insights into the effect of the bulk water through a proton transfer mechanism on the dehydrogenation, C-C coupling, and dehydration

Research Organization:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-76RL01830
OSTI ID:
1648037
Report Number(s):
PNNL-SA-155321
Journal Information:
ChemCatChem, Vol. 12, Issue 4
Country of Publication:
United States
Language:
English

References (51)

Synthesis of Transportation Fuels from Biomass: Chemistry, Catalysts, and Engineering journal September 2006
Catalytic Production of Liquid Fuels from Biomass‐Derived Oxygenated Hydrocarbons: Catalytic Coupling at Multiple Length Scales journal September 2009
Aldol condensation of acetone/acetone d6 over magnesium oxide and lanthanum oxide journal June 1988
Acetone condensation and selective hydrogenation to MIBK on Pd and Pt hydrotalcite-derived MgAl mixed oxide catalysts journal November 2005
The production of methyl vinyl ketone by the vapor-phase aldol condensation between formaldehyde and acetone journal July 1987
Key Roles of Lewis Acid–Base Pairs on Zn x Zr y O z in Direct Ethanol/Acetone to Isobutene Conversion journal December 2015
Role of surface intermediates in the deactivation of Mg Zr mixed oxides in acetone self-condensation: A combined DRIFT and ex situ characterization approach journal September 2015
Entropy-Driven High Reactivity of Formaldehyde in Nucleophilic Attack by Enolates on Oxide Surfaces journal January 2018
Condensation and esterification reactions of alkanals, alkanones, and alkanols on TiO2: Elementary steps, site requirements, and synergistic effects of bifunctional strategies journal August 2016
Substituent Effects and Molecular Descriptors of Reactivity in Condensation and Esterification Reactions of Oxygenates on Acid–Base Pairs at TiO 2 and ZrO 2 Surfaces journal September 2016
Aldol Condensation Reaction between Formaldehyde and Acetone over Heat-Treated Synthetic Hydrotalcite and Hydrotalcite-Like Compounds journal March 1988
Single-reactor process for sequential aldol-condensation and hydrogenation of biomass-derived compounds in water journal June 2006
Activation of Mg–Al Hydrotalcite Catalysts for Aldol Condensation Reactions journal January 1998
Solid Lewis Acids Catalyze the Carbon–Carbon Coupling between Carbohydrates and Formaldehyde journal January 2015
First-Principles Study of Phenol Hydrogenation on Pt and Ni Catalysts in Aqueous Phase journal July 2014
Aldol Condensation of Cyclopentanone on Hydrophobized MgO. Promotional Role of Water and Changes in the Rate-Limiting Step upon Organosilane Functionalization journal February 2019
Catalytic Proton Dynamics at the Water/Solid Interface of Ceria-Supported Pt Clusters journal August 2016
Proton Migration on Hydrated Surface of Cubic ZrO 2 : Ab initio Molecular Dynamics Simulation journal December 2015
Diffusion and reaction pathways of water near fully hydrated TiO 2 surfaces from ab initio molecular dynamics journal July 2017
Water Dissociates at the Aqueous Interface with Reduced Anatase TiO 2 (101) journal May 2018
The Effect of Water on the CO Oxidation on Ag(111) and Au(111) Surfaces: A First-Principle Study journal October 2008
Aqueous-Phase Acetic Acid Ketonization over Monoclinic Zirconia journal December 2017
A Periodic Density Functional Theory Analysis of the Effect of Water Molecules on Deprotonation of Acetic Acid over Pd(111) journal September 2001
Molecular-Level Details about Liquid H 2 O Interactions with CO and Sugar Alcohol Adsorbates on Pt(111) Calculated Using Density Functional Theory and Molecular Dynamics journal June 2015
DFT study of stabilization effects on N-doped graphene for ORR catalysis journal August 2018
Mechanistic Effects of Water on the Fe-Catalyzed Hydrodeoxygenation of Phenol. The Role of Brønsted Acid Sites journal January 2018
First-principles study of the role of solvent in the dissociation of water over a Pt-Ru alloy journal August 2003
The promotional role of water in heterogeneous catalysis: mechanism insights from computational modeling: The promotional role of water in heterogeneous catalysis journal June 2016
Mechanistic insights into aqueous phase propanol dehydration in H-ZSM-5 zeolite journal October 2016
Insight into methanol synthesis from CO2 hydrogenation on Cu(111): Complex reaction network and the effects of H2O journal July 2011
Comparative study of dehydrogenation of methanol at Pt(111)/water and Pt(111)/vacuum interfaces journal August 2003
The role of water in the initial steps of methanol oxidation on Pt(111) journal December 2005
Aldol condensation reactions of acetone and formaldehyde over vanadium phosphate catalysts: Comments on the acid–base properties journal January 2002
Formaldehyde Encapsulated in Zeolite:  A Long-Lived, Highly Activated One-Carbon Electrophile to Carbonyl-Ene Reactions journal March 2004
Catalysis by Coke Deposits: Synthesis of Isoprene over Solid Catalysts journal October 2013
Catalysis by Coke Deposits: Synthesis of Isoprene over Solid Catalysts journal October 2013
Quickstep: Fast and accurate density functional calculations using a mixed Gaussian and plane waves approach journal April 2005
Generalized Gradient Approximation Made Simple journal October 1996
Separable dual-space Gaussian pseudopotentials journal July 1996
Relativistic separable dual-space Gaussian pseudopotentials from H to Rn journal August 1998
All-electron ab-initio molecular dynamics journal January 2000
Gaussian basis sets for accurate calculations on molecular systems in gas and condensed phases journal September 2007
A consistent and accurate ab initio parametrization of density functional dispersion correction (DFT-D) for the 94 elements H-Pu journal April 2010
A unified formulation of the constant temperature molecular dynamics methods journal July 1984
Canonical sampling through velocity rescaling journal January 2007
Reaction path analysis for 1-butanol dehydration in H-ZSM-5 zeolite: Ab initio and microkinetic modeling journal October 2015
A climbing image nudged elastic band method for finding saddle points and minimum energy paths journal December 2000
Reversible work transition state theory: application to dissociative adsorption of hydrogen journal February 1995
Facet-dependent trapping and dynamics of excess electrons at anatase TiO2 surfaces and aqueous interfaces journal June 2016
Reaction pathway and free energy barrier for defect-induced water dissociation on the (101) surface of TiO2-anatase journal October 2003
Structure of a Water Monolayer on the Anatase TiO 2 ( 101 ) Surface journal July 2014