Homocoupling of Phenylboronic Acid using Atomically Dispersed Gold on Carbon Catalysts: Catalyst Evolution Before Reaction

Parmentier, Tanja E.; Dawson, Simon R.; Malta, Grazia; Li, Lu; Davies, Thomas E.; Kondrat, Simon A.; Kiely, Christopher J.; Hutchings, Graham J.

doi:10.1002/cctc.201701840

Cited by 14 publications

(18 citation statements)

References 37 publications

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“…Parmentier et al [116] deposited Au NPs on the surface of high-surface-area activated carbon via colloid immobilization or impregnation with an aqua regia solution of gold. However, the Au NPs were still poisoned and deactivated by the formed organic compounds and intermediates unless a base promoter was used [117].…”

Section: Colloid Immobilizationmentioning

confidence: 99%

Development of gold catalysts supported by unreducible materials: Design and promotions

Luo

Dong

Petit

et al. 2021

Chinese Journal of Catalysis

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Gold catalysis had been considered a highly efficient candidate for heterogeneous catalysis. It is well established that reducible-material-supported Au NPs are more reactive than the unreducible materials, unless specific modifications are carried out. However, unreducible materials such as carbon materials, silica, and alumina have particular advantages, including the easily controlled surface property, adjustable microscopic structure, earth-abundant reserves, and facile industrial manufacture. New strategies, influences, and mechanisms of modification to enhance the catalytic performance and thermal stability of unreducible-material-supported gold catalysts are among the most attractive research topics in gold catalysis. However, to the best of our knowledge, reports and reviews focused on unreducible-material-supported gold catalysts are lacking. Herein, the above concept will be thoroughly discussed regarding several typical unreducible supports, including the commonly used silica, alumina, carbon materials, and hydroxyapatite. The currently prevailing modification strategies will be summarized in detail from the aspects of theoretical conceptualization and practical methodology, including the ingenious synthesis method for catalyst with a specific structure, the currently prosperous electrostatic adsorption, colloid immobilization, and the applicative thermal gaseous treatment. The influences of physical and chemical modifications on the surface chemistry, electronic structure, interaction/synergy between Au-support/promoter, catalyst morphology and water precipitation will be also summarized. It is assumed that the review will shed light on significant studies on unreducible support in gold catalysis with the purpose of catalytic promotion and the promotion of the potential industrial demands in advance. Furthermore, the review will provide new insights into unreducible supports that can be potentially applied in gold catalysis.

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Section: Colloid Immobilizationmentioning

confidence: 99%

Development of gold catalysts supported by unreducible materials: Design and promotions

Luo

Dong

Petit

et al. 2021

Chinese Journal of Catalysis

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“…mentally disproved in the homocoupling of phenylboronic acid 13 and in Sonogashira-type coupling reactions. 14 The most possible catalytic sites seem to be the low-coordinated Au(0) atoms on the surface of the nanoparticles.…”

Section: Syn Thesismentioning

confidence: 99%

Nanogold(0)-Catalyzed Addition of Heteroelement σ Linkages to Functional Groups

Stratakis

Lykakis

2019

Synthesis

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In recent years, supported Au nanoparticles and nanoporous Au materials have shown remarkable catalytic activity in the activation of σ heteroelement linkages such as, Si–H, Si–Si, B–B and B–Si, and their subsequent addition to functional groups, primarily π bonds. In this review article we discuss the reaction modes known to date, and attempt to discuss the mechanistic clues of these transformations which are rather unexpected in terms of conventional transition-metal catalysis concepts, given that the catalytic sites are metallic Au(0).1 Introduction2 Activation of Hydrosilanes2.1 Reactions of Hydrosilanes with Alkynes2.1.1 Hydrosilylation2.1.2 Dehydrogenative Coupling2.2 Reactions of Hydrosilanes with Allenes2.3 Reactions of Hydrosilanes with Carbonyl Compounds and Imines2.4 Reactions of Hydrosilanes with α-Diazo Carbonyl Compounds2.5 Miscellaneous Transformations from the Nano Au-Catalyzed Activation of Hydrosilanes3 Activation of Disilanes3.1 Disilylation of Alkynes3.2 Reactions of 1,1,2,2-Tetramethyldisilane with Alkynes4 Activation of Diboranes4.1 Diborylation of Alkenes4.2 Diborylation of Alkynes4.3 Diborylation of Allenes4.4 Diborylation of Methylenecyclopropanes5 Activation of Silylboranes5.1 Silaboration of Alkynes5.2 Silaboration of Allenes5.3 Silaboration of Unactivated Epoxides and Oxetanes5.4 Reactions of Silylboranes with Aromatic Carbonyl Compounds6 Conclusions and Future Perspectives

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“…Further increasing Cu loading resulted in a slight decrease of product yields (entries 5 and 6). The comparison of the composites 1d with other reported catalysts for the homocoupling reactions is listed in Table S2, most of which require a base, high temperature, high pressure of pure O 2, and noble metals. − These comparisons highlight the unique activity of the MOF-supported dual-component composites, which catalyze the C–C coupling base-free at room temperature with just the normal air.…”

Section: Resultsmentioning

confidence: 99%

Construction of Cu^II Defects on CuCl Nanoparticles in Metal–Organic Frameworks toward Composite Catalysts with Superior Activity

Liu

Luo

et al. 2021

Inorg. Chem.

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Metal−organic frameworks (MOFs) represent an ideal platform for the construction of highly active composite catalysts. However, loading metastable and/or multicomponent metal compounds into MOFs remains a synthetic bottleneck due to the great challenge of keeping the guest and matrix intact during the preparation of a composite. In this work, we develop a new impregnation reduction surface modification (IRSM) strategy to give a new composite catalyst CuCl@MIL-101(Cr), which is successfully postmodified by in situ construction of Cu II defects on the surface of loaded CuCl inside MOF pores, leading to the new composite material Cu II /Cu I @MIL-101(Cr). The new dual-component composite catalyst exhibits a hierarchical structure and superior catalytic activity in C−C homocoupling of arylboronic acids under green conditions. This study presents a facile strategy for improving the catalytic activity by constructing defects on the surface of MOF-based catalysts as well as for forming multiple-component composite materials.

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Homocoupling of Phenylboronic Acid using Atomically Dispersed Gold on Carbon Catalysts: Catalyst Evolution Before Reaction

Cited by 14 publications

References 37 publications

Development of gold catalysts supported by unreducible materials: Design and promotions

Development of gold catalysts supported by unreducible materials: Design and promotions

Nanogold(0)-Catalyzed Addition of Heteroelement σ Linkages to Functional Groups

Construction of Cu^II Defects on CuCl Nanoparticles in Metal–Organic Frameworks toward Composite Catalysts with Superior Activity

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Homocoupling of Phenylboronic Acid using Atomically Dispersed Gold on Carbon Catalysts: Catalyst Evolution Before Reaction

Cited by 14 publications

References 37 publications

Development of gold catalysts supported by unreducible materials: Design and promotions

Development of gold catalysts supported by unreducible materials: Design and promotions

Nanogold(0)-Catalyzed Addition of Heteroelement σ Linkages to Functional Groups

Construction of CuII Defects on CuCl Nanoparticles in Metal–Organic Frameworks toward Composite Catalysts with Superior Activity

Contact Info

Product

Resources

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Construction of Cu^II Defects on CuCl Nanoparticles in Metal–Organic Frameworks toward Composite Catalysts with Superior Activity