Catalysis by Gold: Isolated Surface Au<sup>3+</sup> Ions are Active Sites for Selective Hydrogenation of 1,3‐Butadiene over Au/ZrO<sub>2</sub> Catalysts

Zhang, Xin; Shi, Hui; Xu, Bin

doi:10.1002/ange.200502101

Cited by 68 publications

(37 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Experimentally, anchoring mononuclear organometallic complexes on supports can be achieved by utilization of the coordination between the ligands of the complex and the surface groups of the support materials. 17,23,25,26 In many heterogeneously catalytic processes, more accessible metal active sites are needed for activation of reactants, which requires pretreatment of catalyst to remove useless or even poisonous ligands. As a result, it runs the risk for the single-atom metal species to aggregate to larger particles.…”

Section: Preparation Of Sacsmentioning

confidence: 99%

“…18,24,25,38,39 Inasmuch as the anchoring sites on the support are not always abundant, low loadings of metal with high-surface-area supports are generally required to achieve SACs. 18,24,26,31 2.2. Characterizations of SACs.…”

Section: Preparation Of Sacsmentioning

confidence: 99%

“…When single atoms serve as the catalytically active sites, the activity will increase with reduced particle sizes or loadings and arrive at a constant value until atomic dispersion is reached. 26 We will summarize here several key SAC systems.…”

Section: Preparation Of Sacsmentioning

confidence: 99%

“…36,43,53À55 Besides, the modified electronic properties of metal single active sites are suggested to be the origin of high activity of SACs in some other catalytic processes. 26,30 (b) Selectivity. SACs also improve selectivity in various reactions because of their well-defined, single site features.…”

Section: The Correlations Between the Properties And Reactivities Of mentioning

confidence: 99%

See 3 more Smart Citations

Single-Atom Catalysts: A New Frontier in Heterogeneous Catalysis

et al. 2013

View full text Add to dashboard Cite

Supported metal nanostructures are the most widely used type of heterogeneous catalyst in industrial processes. The size of metal particles is a key factor in determining the performance of such catalysts. In particular, because low-coordinated metal atoms often function as the catalytically active sites, the specific activity per metal atom usually increases with decreasing size of the metal particles. However, the surface free energy of metals increases significantly with decreasing particle size, promoting aggregation of small clusters. Using an appropriate support material that strongly interacts with the metal species prevents this aggregation, creating stable, finely dispersed metal clusters with a high catalytic activity, an approach industry has used for a long time. Nevertheless, practical supported metal catalysts are inhomogeneous and usually consist of a mixture of sizes from nanoparticles to subnanometer clusters. Such heterogeneity not only reduces the metal atom efficiency but also frequently leads to undesired side reactions. It also makes it extremely difficult, if not impossible, to uniquely identify and control the active sites of interest.The ultimate small-size limit for metal particles is the single-atom catalyst (SAC), which contains isolated metal atoms singly dispersed on supports. SACs maximize the efficiency of metal atom use, which is particularly important for supported noble metal catalysts. Moreover, with well-defined and uniform single-atom dispersion, SACs offer great potential for achieving high activity and selectivity.In this Account, we highlight recent advances in preparation, characterization, and catalytic performance of SACs, with a focus on single atoms anchored to metal oxides, metal surfaces, and graphene. We discuss experimental and theoretical studies for a variety of reactions, including oxidation, water gas shift, and hydrogenation. We describe advances in understanding the spatial arrangements and electronic properties of single atoms, as well as their interactions with the support. Single metal atoms on support surfaces provide a unique opportunity to tune active sites and optimize the activity, selectivity, and stability of heterogeneous catalysts, offering the potential for applications in a variety of industrial chemical reactions.

show abstract

Section: Preparation Of Sacsmentioning

confidence: 99%

Section: Preparation Of Sacsmentioning

confidence: 99%

Section: Preparation Of Sacsmentioning

confidence: 99%

Section: The Correlations Between the Properties And Reactivities Of mentioning

confidence: 99%

See 2 more Smart Citations

Single-Atom Catalysts: A New Frontier in Heterogeneous Catalysis

et al. 2013

View full text Add to dashboard Cite

show abstract

“…There are also the many feature of metal nanoparticles in the various field of science and are well established like sensitive detection of carbohydrate antigen 125 by hollow polydopamine-gold nanoparticles; deposition of gold nanoparticle on the core-shell of Fe 3 O 4 polydopamine by green method and it is recyclable; ultrasensitive detection of prostate specific antigen by Graphene oxide quantum dots based on silver core-shell nanocrystals [3][4][5]. It is therefore of utmost important to evolve simple and effective methodology for the synthesis of various biological or other important [3][4][5][6][7][8][9][10][11][12][13][14][15]. However, low solubility of reactants, incompatibility of certain intermediate or competition between the desired reactants and hydrolysis restrict the use of water as a common solvent to carry out organic reaction, although many reactions have been studied in water using different catalyst.…”

Section: Introductionmentioning

confidence: 99%

Metal (Au, Ag and Cu) NPs in Ionic Liquid: Potential Catalytic System for Organic Reactions

Singh¹,

Kumari²,

Chandra³

2017

J Nanomed Nanotechnol

View full text Add to dashboard Cite

Synthesis Strategies, Catalytic Applications, and Performance Regulation of Single‐Atom Catalysts

Jung

et al. 2021

Adv Funct Materials

164

106

View full text Add to dashboard Cite

The recent dramatic increase in research on isolated metal atoms has received extensive scientific interest in the new frontier of single‐atom catalysis. As newly advanced materials in catalysis, single‐atom catalysts (SACs) have received enormous interest from the perspectives of both scientific research and industrial applications due to their remarkable activity. In addition, other catalytic properties of single metal atoms, including stability and selectivity, can be further improved by tuning their electronic/geometric structures and modulating the metal–support interactions. SACs usually consist of dispersed atoms and appropriate support materials, which are employed to anchor, confine, and/or coordinate with isolated metal atoms. Therefore, the nature of single metal sites allows acquiring a maximum atom utilization approaching 100%, which is of significance, particularly for the development of noble‐metal‐based catalysts. In order to systematically understand the structure–property relationships and the underlying catalytic mechanisms relationship of SACs, the representative scientific research efforts in their synthesis strategies, catalytic applications, and performance regulation are discussed here. Typical single‐atom catalysis processes and the corresponding mechanisms in electrochemistry, photochemistry, organic synthesis, and biomedicine are also summarized. Finally, the challenges and prospects for the development of single‐atom catalysis and SACs are highlighted.

show abstract

Catalysis by Gold: Isolated Surface Au³⁺ Ions are Active Sites for Selective Hydrogenation of 1,3‐Butadiene over Au/ZrO₂ Catalysts

Cited by 68 publications

References 27 publications

Single-Atom Catalysts: A New Frontier in Heterogeneous Catalysis

Single-Atom Catalysts: A New Frontier in Heterogeneous Catalysis

Metal (Au, Ag and Cu) NPs in Ionic Liquid: Potential Catalytic System for Organic Reactions

Synthesis Strategies, Catalytic Applications, and Performance Regulation of Single‐Atom Catalysts

Contact Info

Product

Resources

About

Catalysis by Gold: Isolated Surface Au3+ Ions are Active Sites for Selective Hydrogenation of 1,3‐Butadiene over Au/ZrO2 Catalysts

Cited by 68 publications

References 27 publications

Single-Atom Catalysts: A New Frontier in Heterogeneous Catalysis

Single-Atom Catalysts: A New Frontier in Heterogeneous Catalysis

Metal (Au, Ag and Cu) NPs in Ionic Liquid: Potential Catalytic System for Organic Reactions

Synthesis Strategies, Catalytic Applications, and Performance Regulation of Single‐Atom Catalysts

Contact Info

Product

Resources

About

Catalysis by Gold: Isolated Surface Au³⁺ Ions are Active Sites for Selective Hydrogenation of 1,3‐Butadiene over Au/ZrO₂ Catalysts