Understanding the synergistic effects of gold bimetallic catalysts

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

doi:10.1016/j.jcat.2013.08.023

Cited by 187 publications

(119 citation statements)

References 124 publications

(218 reference statements)

Supporting

Mentioning

111

Contrasting

Unclassified

Order By: Relevance

“…In fact, the preparation method employed (DP with KOH) leads to Au particles smaller than 5 nm [4,5,13]. Moreover the presence of silver or copper reported to hinder the Au sintering at high temperatures [21,27,51]. On the basis of the above consideration we can reasonably suggest that the occurrence of a strong Au-Ag interaction, with formation of Au-Ag alloy or bimetallic clusters, is able to promote a major enhancement of surface ceria oxygens mobility which positively affects partial oxidation reactions more than deep combustion ones.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Au–Ag/CeO2 and Au–Cu/CeO2 Catalysts for Volatile Organic Compounds Oxidation and CO Preferential Oxidation

et al. 2015

View full text Add to dashboard Cite

Oxidation of volatile organic compounds (VOC) and preferential oxidation of CO in the excess of H 2 (CO-PROX) were investigated over mono and bimetallic Au-Ag/CeO 2 and Au-Cu/CeO 2 catalysts. For the oxidation of VOC (2-propanol, ethanol and toluene) Au/CeO 2 was the most active catalyst for the combustion of alcohols to CO 2 , Ag/CeO 2 gave the best performance in the toluene total oxidation, Au-Ag/CeO 2 and Au-Cu/CeO 2 showed the highest selectivity to partial oxidation products. For CO-PROX Au-Ag/CeO 2 and Au-Cu/CeO 2 samples exhibited higher CO 2 yield at low temperature than monometallic ones. The improved performance of bimetallic catalysts were accounted for an enhancement of surface ceria oxygens mobility caused by the addition of Ag or Cu to Au/ CeO 2 and involved in both investigated reactions. This effect was more evident on Au-Ag/CeO 2 where a strong Au-Ag interaction occurred with formation of Au-Ag alloy or linked monometallic nanoparticles. Graphical Abstract

show abstract

Section: Discussionmentioning

confidence: 99%

“…One of the most promising approaches to overcome these problems is the addition of a second metal to gold [21]. Alloying gold with Pd or Pt has proved for instance as an effective method to increase the activity of monometallic systems in selective oxidation reactions [22].…”

Section: Introductionmentioning

confidence: 99%

Au–Ag/CeO2 and Au–Cu/CeO2 Catalysts for Volatile Organic Compounds Oxidation and CO Preferential Oxidation

et al. 2015

View full text Add to dashboard Cite

show abstract

“…The XRD patterns of Cu x O y /Al 2 O 3 and Ce x O y /Al 2 O 3 catalysts are indistinguishable from the XRD pattern recorded for the support. This result could be explained by the high dispersion of Cu x O y and Ce x O y particles [6], their amorphous state [31] or relatively low concentration of supported metals. Three new diffraction peaks at 2θ of 38.1°, 44.4°, and 64.6° were observed for the Au/Al 2 O 3 (IMP) and Au/Al 2 O 3 (DP) catalysts (Fig.…”

Section: Phase Composition Dispersion and Crystallinity Of The Catamentioning

confidence: 99%

The effect of metal deposition order on the synergistic activity of Au–Cu and Au–Ce metal oxide catalysts for CO oxidation

Николаев

Голубина

Кротова

et al. 2015

Applied Catalysis B: Environmental

View full text Add to dashboard Cite

“…However, the intrinsically poor capability of IBgroup metals for H 2 activation renders them at least one order of magnitude less active than the Pt-group metals. To enhance the activity of IB-group metals, delicate control of metal-support interactions [10][11][12][13][14] or alloying with a small amount of Pt-group metals 15,16 was tested. However, the achieved chemoselectivity of these catalysts was not satisfactory.…”

mentioning

confidence: 99%

FeOx-supported platinum single-atom and pseudo-single-atom catalysts for chemoselective hydrogenation of functionalized nitroarenes

et al. 2014

Self Cite

View full text Add to dashboard Cite

The catalytic hydrogenation of nitroarenes is an environmentally benign technology for the production of anilines, which are key intermediates for manufacturing agrochemicals, pharmaceuticals and dyes. Most of the precious metal catalysts, however, suffer from low chemoselectivity when one or more reducible groups are present in a nitroarene molecule. Herein we report FeO x -supported platinum single-atom and pseudo-single-atom structures as highly active, chemoselective and reusable catalysts for hydrogenation of a variety of substituted nitroarenes. For hydrogenation of 3-nitrostyrene, the catalyst yields a TOF of B1,500 h À 1 , 20-fold higher than the best result reported in literature, and a selectivity to 3-aminostyrene close to 99%, the best ever achieved over platinum group metals. The superior performance can be attributed to the presence of positively charged platinum centres and the absence of Pt-Pt metallic bonding, both of which favour the preferential adsorption of nitro groups.

show abstract

Understanding the synergistic effects of gold bimetallic catalysts

Cited by 187 publications

References 124 publications

Au–Ag/CeO2 and Au–Cu/CeO2 Catalysts for Volatile Organic Compounds Oxidation and CO Preferential Oxidation

Au–Ag/CeO2 and Au–Cu/CeO2 Catalysts for Volatile Organic Compounds Oxidation and CO Preferential Oxidation

The effect of metal deposition order on the synergistic activity of Au–Cu and Au–Ce metal oxide catalysts for CO oxidation

FeOx-supported platinum single-atom and pseudo-single-atom catalysts for chemoselective hydrogenation of functionalized nitroarenes

Contact Info

Product

Resources

About