Catalysis by gold: New insights into the support effect

Liu, Xiao Yan; Wang, Aiqin; Zhang, Tao; Mou, Chung‐Yuan

doi:10.1016/j.nantod.2013.07.005

Cited by 214 publications

(166 citation statements)

References 189 publications

(234 reference statements)

Supporting

Mentioning

155

Contrasting

Unclassified

Order By: Relevance

“…2b, the rate increases with the value of DG 0 . These results suggest that the reducibility of the metal oxide support has a significant effect on the catalytic activity for low-temperature CO oxidation, in agreement with results obtained from Au catalysts prepared by other methods [7,15].…”

Section: Catalytic Activitysupporting

confidence: 90%

“…Haruta's model also accounts for the difference in activity between reducible and irreducible metal oxides. Au catalysts supported on reducible metal oxides, such as TiO 2 and Fe 2 O 3 , display higher catalytic activity than those supported on irreducible materials, such as Al 2 O 3 or SiO 2 [6,7]. SnO 2 is a popular n-type oxide semiconductor (i.e., a reducible metal oxide) that is widely used in various applications, including gas sensors and optical/electrical devices.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

High Activity of Gold/Tin-Dioxide Catalysts for Low-Temperature CO Oxidation: Application of a Reducible Metal Oxide to a Catalyst Support

2014

View full text Add to dashboard Cite

Au/SnO 2 catalysts were prepared by both the solid grinding (SG) method and the deposition precipitation (DP) method. Compared to samples prepared by the DP method, the SG samples showed remarkably high activity for low-temperature CO oxidation, because of a more efficient Au deposition on SnO 2 by the SG method. Detailed analysis revealed that the perimeter interface between Au and SnO 2 is the active site for catalysis. The present results suggest that the activity of Au/oxide catalysts is associated with the reducibility of the metal oxide supports at the perimeter interface.

show abstract

Section: Catalytic Activitysupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

High Activity of Gold/Tin-Dioxide Catalysts for Low-Temperature CO Oxidation: Application of a Reducible Metal Oxide to a Catalyst Support

2014

View full text Add to dashboard Cite

show abstract

“…However, one problem generally encountered with these catalysts is the relatively weak metal-support interaction, which may lead to the sintering of gold nanoparticles at elevated temperatures. Therefore, several strategies have been implemented to construct gold 2 Indian Journal of Materials Science catalysts with diversified local structures and better catalytic performance [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Catalytic Activity of Supported Gold Catalysts for Oxidation of Noxious Environmental Pollutant CO

Saikia

Miah

Malakar

et al. 2015

Indian Journal of Materials Science

View full text Add to dashboard Cite

Noble metal nanomaterials have attracted mounting research attention for applications in diverse fields of catalysis, biology, and nanotechnology. In the present study, we have undertaken a detailed investigation on synthesis, characterization, and catalytic activity studies for CO oxidation by nanogold catalysts supported over CeO 2 and CeO 2 -ZrO 2 (1 : 1 mole ratio). The support systems were prepared by modified, simple precipitation technique and the Au supported samples were synthesized using depositionprecipitation with urea method. The physicochemical characterization was performed by XRD, ICP-AES, BET surface area, FT-IR, UV-Vis DRS, Raman Spectroscopy, TEM, and XPS techniques. Au/CeO 2 catalyst showed more than 80% CO conversions at 30 ∘ C, whereas Au/CeO 2 -ZrO 2 exhibited ∼100% CO conversion at that temperature. The catalytic performance of Au catalysts is highly dependent on the nature of the support.

show abstract

“…Among different strategies [1], the thermochemical processing strategy (Figure 2), has demonstrated effectivity not only in removing the encapsulation, but also in refining the nanostructural parameters. The synthesis protocol of nanoalloy catalysts could be established by a sequence of steps: (1) chemical synthesis of the metal nanocrystal cores capped with ligands; (2) assembly of the encapsulated nanoparticles on supporting materials (e.g., carbon powders, TiO 2 or SiO 2 ) [15,21,25,54]; and (3) thermal treatment of the supported nanoparticles [55][56][57].…”

Section: Figurementioning

confidence: 99%

“…1:1, 1:3, or 3:1) in binary nanocatalysts [3,[16][17][18]. Moreover, the strong metal-support interaction has a predominant influence on the catalytic properties [19][20][21]. In addition to various nanostructural design parameters [22][23][24], the understanding of how activation of oxygen on alloy catalysts plays an important role in different catalytic reactions (Figure 1(C)) remains elusive.…”

Section: Introductionmentioning

confidence: 99%

CO oxidation on supported platinum group metal (PGM) based nanoalloys

et al. 2014

View full text Add to dashboard Cite

The oxidation of carbon monoxide is widely investigated for realistic and potential uses in energy production and environmental processes. As a probe reaction to the surface properties, it gives an insight into the relationship between the structure of active phase and catalytic performance. Noble metals alloyed with certain transition metals in the form of a nanoalloy exhibit enhanced catalytic activity for various reactions, especially when simultaneous activation of oxygen and CO is involved. This article highlights some of these insights into nanoalloy catalysts in which platinum group metal (PGM) is alloyed with a second and/or third transition metal (M/M′=Co, Fe, V, Ni, Ir, etc.), for catalytic oxidation of carbon monoxide in a gas phase. Recent studies have provided important insights into how the atomic-scale structures of the nanoalloy catalysts operate synergistically in activating oxygen and maneuvering surface oxygenated species. The exploration of atomic-scale chemical/structural ordering and coordination in correlation with the catalytic oxidation properties based on findings from ex-and in-situ synchrotron X-ray techniques is emphasized; for example, high-energy X-ray diffraction coupled to atomic-pair distribution function and X-ray absorption fine-structure spectroscopic analysis. The understanding of the detailed active sites of the nanoalloys has significant implications for the design of low-cost, active, and durable catalysts for sustainable energy production and environmental processes. nanoalloy catalysts, supported noble metal, carbon monoxide oxidation, synchrotron X-ray

show abstract

Catalysis by gold: New insights into the support effect

Cited by 214 publications

References 189 publications

High Activity of Gold/Tin-Dioxide Catalysts for Low-Temperature CO Oxidation: Application of a Reducible Metal Oxide to a Catalyst Support

High Activity of Gold/Tin-Dioxide Catalysts for Low-Temperature CO Oxidation: Application of a Reducible Metal Oxide to a Catalyst Support

Enhanced Catalytic Activity of Supported Gold Catalysts for Oxidation of Noxious Environmental Pollutant CO

CO oxidation on supported platinum group metal (PGM) based nanoalloys

Contact Info

Product

Resources

About