Hybrid Au–Ag Nanostructures for Enhanced Plasmon-Driven Catalytic Selective Hydrogenation through Visible Light Irradiation and Surface-Enhanced Raman Scattering

Zhang, Yin; Wang, Ye; Song, Chuqiao; Zheng, Li; Ma, Na; Liu, Xi; Li, Siwei; Lin, Lili; Li, Mengzhu; Xü, Yao; Li, Weizhen; Hu, Gang; Fang, Zheyu; Ma, Ding

doi:10.1021/jacs.7b11293

Cited by 222 publications

(156 citation statements)

References 34 publications

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“…In particular, spherical Au–Ag bimetallic NPs are expected to be catalytically active and have been shown to have high catalytic activity in alcohol oxidation as compared to spherical Au NPs . The improvement in the catalytic activity can be attributed to changes in the electronic states of the Au atoms upon adding Ag, and indeed, bimetallic shape‐controlled NCs are expected to exhibit novel catalytic properties …”

Section: Introductionmentioning

confidence: 99%

Au–Ag Nanoflower Catalysts with Clean Surfaces for Alcohol Oxidation

Imura

Akiyama

Furukawa

et al. 2019

Chemistry An Asian Journal

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Shape‐controlled metal nanocrystals, such as nanowires and nanoflowers, are attractive owing to their potentially novel catalytic properties and bimetallic nanocrystals composed of two distinct metals are expected to act as highly active catalysts. However, their catalytic activities are limited because of the capping agents adsorbed on the metal surfaces, which are necessary for the preparation and dispersion of these nanocrystals in solvents. Therefore, the preparation of bimetallic shape‐controlled noble metal nanocrystals with clean surfaces, devoid of almost all capping agents, are expected to have high catalytic activity. Herein, we report the preparation of bimetallic Au–Ag nanoflowers using melamine as the capping agent. The bimetallic Au–Ag nanoflowers with a clean surface were subsequently obtained by a support and extraction method. The bimetallic nanoflowers with a clean surface were then used for the aerobic oxidation of 1‐phenylethyl alcohol and they exhibited high rates for the formation of acetophenone compared to Au nanoflowers and spherical nanoparticles with almost the same size and Au/Ag ratio. We also show that Au–Ag nanoflowers containing only 1 % Ag (Au99–Ag1NFs) exhibit the highest rate of acetophenone formation among Au–Ag nanoflowers with different Au/Ag ratios owing to an increase in the electron density of the Au atoms that act as active sites for the oxidation of 1‐phenylethyl alcohol.

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Section: Introductionmentioning

confidence: 99%

Au–Ag Nanoflower Catalysts with Clean Surfaces for Alcohol Oxidation

Imura

Akiyama

Furukawa

et al. 2019

Chemistry An Asian Journal

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“…[2,35] These hot electrons will promote dissociation of absorbed NH 3 BH 3 and further reduce the adjacent ÀNO 2 group,finally resulting in improvement of hydrogenation activity. [2,35] The highest photocatalytic activity of S-PTSAui ne ntries 2-4 might be mainly attributed to that porous triple-shell structures provide more of active sites and promote lightharvesting (Figure 3d). At the same time,t he increased plasmonic coupling between shells in triple-shell structures might also contribute to their higher photocatalytic activity.…”

Section: Angewandte Chemiementioning

confidence: 99%

“…Fabricating metal catalysts with an attractive structure and excellent performance have received much attention in recent years. [1][2][3] To evaluate their performance,t he catalytic selectivity plays an important role for specific organic reaction. Chemical modification is an effective strategy for tuning electronic states and steric environment of metal catalysts and further improving their selectivity.…”

mentioning

confidence: 99%

Robust Synthesis of Gold‐Based Multishell Structures as Plasmonic Catalysts for Selective Hydrogenation of 4‐Nitrostyrene

Liu

et al. 2019

Angew Chem Int Ed

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A robust self‐template strategy is used for facile and large‐scale synthesis of porous multishell gold with controllable shell number, sphere size, and in situ surface modification. The process involved the rapid reduction of novel Au‐melamine colloidal templates with a great amount of NaBH4 in presence of poly(sodium‐p‐styrenesulfonate) (PSS). After soaking the templates in other metal salt solution, the obtained bimetallic templates could also be generally converted into bimetallic multishell structures by same reduction process. In the hydrogenation of 4‐nitrostyrene using NH3BH3 as a reducing agent, the porous triple‐shell Au with surface modification (S‐PTSAu) exhibited excellent selectivity (97 %) for 4‐aminostyrene in contrast with unmodified triple‐shell Au. Furthermore, it also showed higher enhancement of catalytic activity under irradiation of visible light as compared to similar catalysts with fewer shells.

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“…[21][22][23] Therefore, researches on photocatalytic degradation of pollutants has attracted increasing attentions, including direct use of sunlight and ultraviolet light in recent years. [24][25][26][27][28] Semiconductor photocatalysts can be directly driven by light, [29][30][31][32] which are considered to be an ideal technology for treating environmental pollution and developing new energy sources. This technology has the advantages of non-toxicity, low energy consumption, and long life cycle; [33][34][35] as well as no selectivity, fast reaction speed, and the potential to complete mineralize organic pollutants.…”

Section: Introductionmentioning

confidence: 99%

Strategies for Improving the Performance and Application of MOFs Photocatalysts

Luo

Wu³

et al. 2019

ChemCatChem

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Residual pollutants in the water treatment process restrict the advanced treatment and purification of wastewater, because most of them have stable structures, and some are not easily to be enriched. Photocatalytic oxidation technology can directly use solar energy to drive a series of chemical reactions, which has advantages such as low energy consumption, mild reaction conditions and rarely secondary pollution. It is an effective way to solve the organic pollution problem in wastewater treatment. The key to this process is to find and design efficient photocatalysts. The current photocatalytic materials mainly include inorganic semiconductors and metal organic frameworks (MOFs). They have been studied for pollutants degradation, hydrogen evolution, CO2 reduction, and organic transformation. But, most of these catalysts have not been used in real application. In this paper, recent research advances in MOFs photocatalysts and the key factors affecting their photocatalytic efficiency were critically reviewed. It is believed that the pursuit of more efficient photocatalyst needs to be considered from the adsorption‐photocatalytic mechanism, redox‐free radical mechanism, valence‐level regulation mechanism and energy transfer mechanism of photocatalysis. It is very necessary to research and develop nanoscale and quantum level mixed valence MOFs photocatalysts, which are constructed by strong electron‐donating groups.

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Hybrid Au–Ag Nanostructures for Enhanced Plasmon-Driven Catalytic Selective Hydrogenation through Visible Light Irradiation and Surface-Enhanced Raman Scattering

Cited by 222 publications

References 34 publications

Au–Ag Nanoflower Catalysts with Clean Surfaces for Alcohol Oxidation

Au–Ag Nanoflower Catalysts with Clean Surfaces for Alcohol Oxidation

Robust Synthesis of Gold‐Based Multishell Structures as Plasmonic Catalysts for Selective Hydrogenation of 4‐Nitrostyrene

Strategies for Improving the Performance and Application of MOFs Photocatalysts

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