Gold Clusters and Nanoparticles Stabilized by Nanoshaped Ceria in Catalysis

Guan, Yejun; Song, Wenli; Hensen, Emiel Emiel

doi:10.1016/b978-0-12-801217-8.00004-9

Cited by 4 publications

(3 citation statements)

References 84 publications

(158 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The smaller the Au particle, the stronger the interaction between Au and the oxygen atom of CeO 2 , and the more prevalent the ionic Au species. Au 0 existed on the topmost layer of Au nanoparticles, whereas cationic Au was located as layers underneath the nanoparticle, between Au 0 and the interface between Au and CeO 2 as reported in a model of the gold–ceria interface ( Longo et al, 2012 ; Guan et al, 2015 ).…”

Section: Resultsmentioning

confidence: 74%

Relationship between hydrothermal temperatures and structural properties of CeO2 and enhanced catalytic activity of propene/toluene/CO oxidation by Au/CeO2 catalysts

et al. 2022

View full text Add to dashboard Cite

A simple hydrothermal synthesis of CeO2 was implemented to obtain a series of CeO2-supported gold (Au) catalysts, used for the total oxidation of propene/toluene/CO gas mixtures and the oxidation of CO. CeO2 preparation started from a cerium hydrogen carbonate precursor using a range of different hydrothermal temperatures (HT) from 120 to 180°C. High-resolution transmission electron microscopy, X-ray diffraction, and H2-temperature-programmed reduction data indicated that CeO2 morphology varied with the HT, and was composed of the more active (200) surface. Following Au deposition onto the CeO2 support, this active crystal plane resulted in the most widely dispersed Au nanoparticles on the CeO2 support. The catalytic performance of the CeO2-supported Au catalysts for both oxidation reactions improved as the reducibility increased to generate lattice oxygen vacancies and the number of adsorbed peroxide species on the CeO2 support increased due to addition of Au. The Au catalyst on the CeO2 support prepared at 120°C was the most active in both propene/toluene/CO oxidation and independent CO oxidation.

show abstract

Section: Resultsmentioning

confidence: 74%

Relationship between hydrothermal temperatures and structural properties of CeO2 and enhanced catalytic activity of propene/toluene/CO oxidation by Au/CeO2 catalysts

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Since the earliest reports from the groups of Flytzani-Stephanopoulos (Fu et al, 2001) and Andreeva (Andreeva et al, 2002) about excellent WGS activity of Au/CeO 2 at low temperatures, numerous studies have clarified how some specific features of ceria affect WGS performance of this kind of catalysts. These include nano-scaled particle size, surface area, surface structure, shape and crystal plane, and especially gold–ceria interface (Karpenko et al, 2007; Si and Flytzani-Stephanopoulos, 2008; Ta et al, 2012; Guan et al, 2015; Yi and Flytzani-Stephanopoulos, 2015; Centeno et al, 2016; Fu et al, 2019). Ceria became an attractive support for new-generation WGS catalysts owing to its ability to undergo a fast Ce 4+ ↔ Ce + transfer and to dissociate water on created oxygen vacancies.…”

Section: Recent Achievements In the Field Of Gold-catalyzed Wgs Reactionmentioning

confidence: 99%

“…291, 2005; Chemical Society Reviews , vol. 37, 2008; two SI in Catalysts: “Gold Catalysts”, 2011 and “New Trends in Gold Catalysts”, 2013), many chapters and reviews (Bond and Thompson, 1999; Haruta, 2002, 2003, 2004; Hashmi, 2007; Hutchings, 2007; Yan et al, 2007; Carabineiro and Thompson, 2010; Gong, 2012; Hutchings and Edwards, 2012; Barakat et al, 2013; Guan et al, 2015; Ma et al, 2015), and a huge number of papers have tackled fundamental and applied aspects related to gold-based catalyst preparation methods and their impact on gold particle size, shape, and oxidation state, role of the nature of support and support effects, relationship between electronic and structural properties of the gold-based catalysts, and catalytic performance in various reactions. Many research efforts have been focused on elucidating a surprisingly high effectiveness of supported gold nanoparticles in a wide variety of processes.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Design of Gold-Based Catalysts for H2 Clean-Up Reactions

Tabakova

2019

Front. Chem.

View full text Add to dashboard Cite

Over the past three decades, supported gold nanoparticles have demonstrated outstanding properties and continue to attract the interest of the scientific community. Several books and comprehensive reviews as well as numerous papers cover a variety of fundamental and applied aspects specific to gold-based catalyst synthesis, characterization by different techniques, relationship among catalyst support features, electronic and structural properties of gold particles, and catalytic activity, reaction mechanism, and theoretical modeling. Among the Au-catalyzed reactions targeting environmental protection and sustainable energy applications, particular attention is paid to pure hydrogen production. The increasing demands for high-purity hydrogen for fuel cell systems caused a renewed interest in the water–gas shift reaction. This well-known industrial process provides an attractive way for hydrogen generation and additional increase of its concentration in the gas mixtures obtained by processes utilizing coal, petroleum, or biomass resources. An effective step for further elimination of CO traces from the reformate stream after water–gas shift unit is the preferential CO oxidation. Developing highly active, stable, and selective catalysts for these two reactions is of primary importance for efficient upgrading of hydrogen purity in fuel cell applications. This review aims to extend the existing knowledge and understanding of the properties of gold-based catalysts for H 2 clean-up reactions. In particular, new approaches and strategies for design of high-performing and cost-effective formulations are addressed. Emphasis is placed on efforts to explore appropriate and economically viable supports with complex composition prepared by various synthesis procedures. Relevance of ceria application as a support for new-generation WGS catalysts is pointed out. The role of the nature of support in catalyst behavior and specifically the existence of an active gold–support interface is highlighted. Long-term stability and tolerance toward start-up/shutdown cycling are discussed. Very recent advances in catalyst design are described focusing on structured catalysts and microchannel reactors. The latest mechanistic aspects of the water–gas shift reaction and preferential CO oxidation over gold-based catalysts from density functional theory calculations are noted because of their essential role in discovering novel highly efficient catalysts.

show abstract

Theoretical investigation of the anchoring and activity of a gold cluster on two-dimensional substrates

Cardoso

Piquini

2019

Mater. Res. Express

View full text Add to dashboard Cite

Gold Clusters and Nanoparticles Stabilized by Nanoshaped Ceria in Catalysis

Cited by 4 publications

References 84 publications

Relationship between hydrothermal temperatures and structural properties of CeO2 and enhanced catalytic activity of propene/toluene/CO oxidation by Au/CeO2 catalysts

Relationship between hydrothermal temperatures and structural properties of CeO2 and enhanced catalytic activity of propene/toluene/CO oxidation by Au/CeO2 catalysts

Recent Advances in Design of Gold-Based Catalysts for H2 Clean-Up Reactions

Theoretical investigation of the anchoring and activity of a gold cluster on two-dimensional substrates

Contact Info

Product

Resources

About