The facile approach to fabricate gold nanoparticles and their application on the hydration and dehydrogenation reactions

Huang, Ronghui; Fu, Yong; Zeng, Wei; Zhang, Liang; Wang, Dawei

doi:10.1016/j.jorganchem.2017.09.016

Cited by 7 publications

(3 citation statements)

References 67 publications

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“…Nonreducible MO x , such as mesoporous SiO 2 and Al 2 O 3 , are used as supports for liquid phase oxidations. In contrast to Au/reducible MO x catalysts, in which the oxygen vacancies are thought to be involved in the reaction mechanism, acid–base properties of MO x become more important for Au/nonreducible MO x catalysts.…”

Section: Catalysis By Gold In Liquid-phase Reactionsmentioning

confidence: 99%

Importance of Size and Contact Structure of Gold Nanoparticles for the Genesis of Unique Catalytic Processes

et al. 2019

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Since the discovery of catalysis by Au nanoparticles (NPs), unique catalytic features of Au have appeared that are greatly different from those of Pd and Pt. In this Review, we aimed to disclose how the unique catalytic abilities of Au are generated with respect to (a) the contact structures between Au and its supports and (b) the size of the Au particles. For CO oxidation, the catalytic activity of Au on reducible metal oxides (MO x ) is strongly correlated with the amount of oxygen vacancies of the MO x surface, which play a key role in O2 activation. Single atoms, bilayers of Au, sub-nm clusters, clusters (1–2 nm), and NPs (2–5 nm) have been proposed as the active sizes of the Au species, which may depend on the type of support. For propylene epoxidation, the presence of isolated TiO4 units in SiO2 supports is important for the production of propylene oxide (PO). Au NPs facilitate the formation of Ti–OOH species, which leads to PO in the presence of H2 and O2, whereas Au clusters facilitate propylene hydrogenation. However, Au clusters can produce PO by using only O2 and water, whereas Au NPs cannot. For alcohol oxidation, the reducibility of the MO x supports greatly influences the catalytic activity of Au, and single Au atoms more effectively activate the lattice oxygen of CeO2. The basic and acidic sites of the MO x surface also play an important role in the deprotonation of alcohols and the activation of aldehydes, respectively. For selective hydrogenation, heterolytic dissociation of H2 takes place at the interface between Au and MO x , and the basic sites of MO x contribute to H2 activation. Recent research into the reaction mechanisms and the development of well-designed Au catalysts has provided new insights into the preparation of high-performance Au catalysts.

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Section: Catalysis By Gold In Liquid-phase Reactionsmentioning

confidence: 99%

Importance of Size and Contact Structure of Gold Nanoparticles for the Genesis of Unique Catalytic Processes

et al. 2019

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“…The second stage-the reaction of (Ph3P)AuCl with n-butyl lithium-was performed in the THF solution under reduced pressure in the absence of oxygen and air moisture by The gold(I) derivatives (Ph 3 P)Au(Alkyl) were synthesized using a modification of the method described in ref. [14] for the synthesis of (Ph 3 P)Au(SC 12 H 25 ). At the first stage, the precursor (Ph 3 P)AuCl was prepared by the reaction of HAuCl 4 with Ph 3 P in a methanol solution in the molar ratio 1:2 (the reagents were rigorously mixed in methanol at ambient temperature until a complete color change from saturated bright yellow to almost colorless pale yellow and complete precipitation of a white powder (Ph 3 P)AuCl occurred).…”

Section: Methodsmentioning

confidence: 99%

“…Several publications dealing with the investigation of the gold nanoparticle growth process in solutions (mainly in water or water-alcohol mixture) or suspension use the photochemical or chemical reduction of gold(III) compounds as starting reagents [12][13][14][15]. However, such gold(III) precursors of gold nanoparticles are not soluble in most organic solvents, which seriously complicates their use in the preparation of polystyrene-based nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

UV-Induced Gold Nanoparticle Growth in Polystyrene Matrix with Soluble Precursor

et al. 2022

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It is demonstrated that UV (LED at 365 nm) irradiation with subsequent heating (90–110 °C) of the polystyrene matrix containing a soluble Au(I) compound ((Ph3P)Au(n-Bu)) results in the growth of gold nanoparticles within the sample bulk, as confirmed by UV-vis spectroscopy and TEM electron microscopy. Pure heating of the samples without previous UV irradiation does not provide gold nanoparticles, thereby facilitating optical image printing. Comparing the nanoparticles’ growth kinetics in samples with different precursor content suggests the nanoparticle growth mechanism through Au(I) autocatalytic reduction at the surface of a gold nanoparticle. Within the polymer matrix, this mechanism is suggested for the first time.

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Recent Progress in Catalytic Oxidative Transformations of Alcohols by Supported Gold Nanoparticles

2019

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Catalytic oxidative transformations of alcohols constitute one of the greatly important protocols for the synthesis of various aldehydes, ketones, acids, imines, amides, etc. that are required to make drug intermediates, food additives, plastics, detergents and cosmetics. The potential of gold nanoparticles (Au NPs) in catalytic oxidation reactions is generally competent owing to their tendency to activate oxygen. Supports play a conspicuous and increasingly important role not only in the preparation and stabilization of Au NPs, but also can address the issues of sustainability by facilitating separation and reusability of the catalyst. This review aims to systematically discuss the impressive developments in catalytic oxidative transformations of alcohols promoted by supported Au NPs in the last five years. These Au NPs exhibit unique electronic properties and crystal structures, which gives us an excellent opportunity to correlate atomic structure with intrinsic catalytic properties over Au NPs. The effect of a support on the significant properties of Au NPs in terms of catalytic activity, selectivity, recyclability, and stability is discussed at length. The tentative reaction mechanisms and the structure‐performance relationships are also discussed at appropriate places, which will provide some clues for the design of efficient Au NPs‐based catalysts.

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The facile approach to fabricate gold nanoparticles and their application on the hydration and dehydrogenation reactions

Cited by 7 publications

References 67 publications

Importance of Size and Contact Structure of Gold Nanoparticles for the Genesis of Unique Catalytic Processes

Importance of Size and Contact Structure of Gold Nanoparticles for the Genesis of Unique Catalytic Processes

UV-Induced Gold Nanoparticle Growth in Polystyrene Matrix with Soluble Precursor

Recent Progress in Catalytic Oxidative Transformations of Alcohols by Supported Gold Nanoparticles

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