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Effect of metal nanoparticle size and titania crystallinity on the performance of Au/TiO2 catalysts for the promotion of carbon monoxide oxidation at cryogenic temperatures

Journal Article · · Journal of Chemical Physics
DOI:https://doi.org/10.1063/1.5114928· OSTI ID:1593411
 [1];  [2]
  1. Univ. of California, Riverside, CA (United States); University of California
  2. Univ. of California, Riverside, CA (United States)
The ability of Au/TiO2 catalysts to promote the oxidation of carbon monoxide at cryogenic temperatures was probed by using diffuse-reflectance infrared absorption spectroscopy (DRIFTS). The aim of this work was to identify correlations between the catalytic activity and both the nature of the titania support and the size of the Au nanoparticles (NPs). Two key intermediates were identified: an initial CO adsorbed on defect sites within the titania support with a 2175 cm-1 C–O stretching frequency signature, and a second species with a DRIFTS peak at 2163 cm-1 associated with the intermediate at Au–TiO2 interfacial sites that incorporates atomic oxygen to produce CO2. CO adsorption at the low temperatures associated with this process (120 K) appears to require defective sites, possibly titanate-type surface species: an amorphous (and NaOH-treated) support showed higher activity than crystalline titania. Furthermore, the catalytic activity peaks at an Au NP average size of about 3 nm, which, in turn, correlates with the population of the second CO intermediate mentioned above. The mechanism that explains this cryogenic oxidation reaction is different than that extensively reported for the room-temperature processes, but both appear to display similar dependence on Au NP diameter.
Research Organization:
Univ. of California, Riverside, CA (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
Grant/Contract Number:
SC0001839
OSTI ID:
1593411
Alternate ID(s):
OSTI ID: 1545965
Journal Information:
Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 5 Vol. 151; ISSN 0021-9606
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

References (50)

A Yolk@Shell Nanoarchitecture for Au/TiO2 Catalysts journal April 2011
Gold Catalysis journal December 2006
A Yolk@Shell Nanoarchitecture for Au/TiO2 Catalysts journal April 2011
Chance and Necessity: My Encounter with Gold Catalysts journal November 2013
CO Oxidation on Au Nanoparticles Supported on ZrO 2 : Role of Metal/Oxide Interface and Oxide Reducibility journal February 2017
Catalysis by Gold journal July 2005
Gold Catalysis journal March 2007
Heterogeneous Gold-Based Catalysis for Green Chemistry: Low-Temperature CO Oxidation and Propene Oxidation journal September 2007
Model Studies on CO Oxidation Catalyst Systems: Titania and Gold Nanoparticles journal May 2010
On the Simple Complexity of Carbon Monoxide on Oxide Surfaces: Facet-Specific Donation and Backdonation Effects Revealed on TiO 2 Anatase Nanoparticles journal April 2016
CO Oxidation over Supported Gold Catalysts—“Inert” and “Active” Support Materials and Their Role for the Oxygen Supply during Reaction journal January 2001
Investigation of the active site and the mode of Au/TiO2 catalyst deactivation using Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS) journal March 2010
Investigation of the active site and the mode of Au/TiO2 catalyst deactivation using Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS) journal December 2010
Kinetics of CO Oxidation Catalyzed by Supported Gold: A Tabular Summary of the Literature journal March 2009
Gold-Titania Catalysts for Low-Temperature Oxidation and Water Splitting journal October 2017
Coordination chemistry of Ti(IV) in silicate glasses and melts: I. XAFS study of titanium coordination in oxide model compounds journal August 1996
Catalytically active gold: The role of cluster morphology journal September 2005
A golden age of catalysis: A perspective journal September 2005
Au and Pt nanoparticle supported catalysts tailored for H2 production: From models to powder catalysts journal May 2016
Evaluation of the Au size effect: CO oxidation catalyzed by Au/TiO2 journal July 2006
Support effects in the Au-catalyzed CO oxidation – Correlation between activity, oxygen storage capacity, and support reducibility journal December 2010
Catalytic oxidation of carbon monoxide at cryogenic temperatures journal November 2014
Catalysis by gold: New insights into the support effect journal August 2013
Surface chemistry of Au/TiO2: Thermally and photolytically activated reactions journal March 2016
Au@Void@TiO2 yolk–shell nanostructures as catalysts for the promotion of oxidation reactions at cryogenic temperatures journal June 2016
In-situ high-temperature XANES observations of rapid and reversible changes in Ti coordination in titania–silica xerogels journal April 1999
Size- and support-dependency in the catalysis of gold journal April 1997
Advances in the catalysis of Au nanoparticles journal December 2001
Probing Surface Structures of CeO 2 , TiO 2 , and Cu 2 O Nanocrystals with CO and CO 2 Chemisorption journal September 2016
How Temperature Affects the Mechanism of CO Oxidation on Au/TiO 2 : A Combined EPR and TAP Reactor Study of the Reactive Removal of TiO 2 Surface Lattice Oxygen in Au/TiO 2 by CO journal July 2016
Heterogeneous Gold-Based Catalysis for Green Chemistry:  Low-Temperature CO Oxidation and Propene Oxidation journal June 2007
Gold-Catalyzed Organic Transformations journal August 2008
Gold-Catalyzed Carbon−Heteroatom Bond-Forming Reactions journal March 2011
Infrared Studies of the Surface Hydroxyl Groups on Titanium Dioxide, and of the Chemisorption of Carbon Monoxide and Carbon Dioxide journal May 1961
Cryogenic CO Oxidation on TiO 2 -Supported Gold Nanoclusters Precovered with Atomic Oxygen journal February 2003
Room Temperature, High-Yield Synthesis of Multiple Shapes of Gold Nanoparticles in Aqueous Solution journal July 2004
Cryogenic CO 2 Formation on Oxidized Gold Clusters Synthesized via Reactive Layer Assisted Deposition journal October 2005
Alternative Methods for the Preparation of Gold Nanoparticles Supported on TiO 2 journal August 2002
CO Oxidation on Gold in Acidic Environments:  Particle Size and Substrate Effects journal November 2007
Catalysis of Gold Nanoparticles Deposited on Metal Oxides journal January 2002
Catalytically active gold on ordered titania supports journal January 2008
Gold nanoparticle (AuNPs) and gold nanopore (AuNPore) catalysts in organic synthesis journal January 2014
A study of the nucleation and growth processes in the synthesis of colloidal gold journal January 1951
Adsorption of O2 and oxidation of CO at Au nanoparticles supported by TiO2(110) journal April 2004
Promotion of atomic hydrogen recombination as an alternative to electron trapping for the role of metals in the photocatalytic production of H2 journal May 2014
Identification of Active Gold Nanoclusters on Iron Oxide Supports for CO Oxidation journal September 2008
Spectroscopic Observation of Dual Catalytic Sites During Oxidation of CO on a Au/TiO2 Catalyst journal August 2011
Onset of Catalytic Activity of Gold Clusters on Titania with the Appearance of Nonmetallic Properties journal September 1998
Catalysis by Gold book January 2006
Novel Gold Catalysts for the Oxidation of Carbon Monoxide at a Temperature far Below 0 °C journal February 1987

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