Supported Au–Cu Bimetallic Alloy Nanoparticles: An Aerobic Oxidation Catalyst with Regenerable Activity by Visible‐Light Irradiation

Sugano, Yoshitsune; Shiraishi, Yasuhiro; Tsukamoto, Daijiro; Ichikawa, Satoshi; Tanaka, Shunsuke; Hirai, Takayuki

doi:10.1002/anie.201301669

Cited by 182 publications

(160 citation statements)

References 36 publications

(2 reference statements)

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“…The formation of Au δ+ accompanied by reduction of CuO and CeO 2 , which was observed for our bimetallic catalysts, is in agreement with the reported data [38,[55][56][57] 0<δ<1) oxidation state due to electron transfer from gold to the metal oxide [55]. The reduction of Ce 4+ to Ce 3+ after deposition of Au on CeO 2 (111) was observed by Škoda et al [58].…”

Section: Oxidation States Of the Supported Metal Nanoparticlessupporting

confidence: 94%

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

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et al. 2015

Applied Catalysis B: Environmental

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Section: Oxidation States Of the Supported Metal Nanoparticlessupporting

confidence: 94%

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

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“…Recent investigations report on the use of bimetallic NPs containing a plasmonic unit combined to another more reactive metallic center. Au NPs alloyed with Pd and supported on ZrO 2 [134] or with Cu on TiO 2 [135] have been reported to enhance benzyl alcohols oxidation under visible light. For the Au-Pd/ZrO 2 system, the amount and distribution of Pd NPs on Au NPs played a key role in enhancing the reaction yield.…”

Section: Direct Plasmonic Photocatalysismentioning

confidence: 99%

Solar-Powered Plasmon-Enhanced Heterogeneous Catalysis

et al. 2016

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Photocatalysis uses semiconductors to convert sunlight into chemical energy. Recent reports have shown that plasmonic nanostructures can be used to extend semiconductor light absorption or to drive direct photocatalysis with visible light at their surface. In this review, we discuss the fundamental decay pathway of localized surface plasmons in the context of driving solar-powered chemical reactions. We also review different nanophotonic approaches demonstrated for increasing solar-tohydrogen conversion in photoelectrochemical water splitting, including experimental observations of enhanced reaction selectivity for reactions occurring at the metalsemiconductor interface. The enhanced reaction selectivity is highly dependent on the morphology, electronic properties, and spatial arrangement of composite nanostructures and their elements. In addition, we report on the particular features of photocatalytic reactions evolving at plasmonic metal surfaces and discuss the possibility of manipulating the reaction selectivity through the activation of targeted molecular bonds. Finally, using solar-tohydrogen conversion techniques as an example, we quantify the efficacy metrics achievable in plasmon-driven photoelectrochemical systems and highlight some of the new directions that could lead to the practical implementation of solar-powered plasmon-based catalytic devices.

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“…As shown in Scheme 1, Au [17][18][19][20][21][22][23][24] or Pt particles [25][26][27][28] supported on semiconductors such as TiO 2 , CeO 2 , ZrO 2 , and SrTiO 3 absorb visible light and produce hot electrons (e hot -) via an intra-or interband transition of 6sp or 5d band electrons. [29][30][31] These e hot -are injected into the semiconductor conduction band (CB) through the metal/semiconductor interface.…”

Section: Introductionmentioning

confidence: 99%

Hot-Electron-Induced Highly Efficient O₂ Activation by Pt Nanoparticles Supported on Ta₂O₅ Driven by Visible Light

et al. 2015

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Aerobic oxidation on a heterogeneous catalyst driven by visible light (λ >400 nm) at ambient temperature is a very important reaction for green organic synthesis. A metal particles/semiconductor system, driven by charge separation via an injection of "hot electrons (e(hot)(-))" from photoactivated metal particles to semiconductor, is one of the promising systems. These systems, however, suffer from low quantum yields for the reaction (<5% at 550 nm) because the Schottky barrier created at the metal/semiconductor interface suppresses the e(hot)(-) injection. Some metal particle systems promote aerobic oxidation via a non-e(hot)(-)-injection mechanism, but require high reaction temperatures (>373 K). Here we report that Pt nanoparticles (∼5 nm diameter), when supported on semiconductor Ta2O5, promote the reaction without e(hot)(-) injection at room temperature with significantly high quantum yields (∼25%). Strong Pt-Ta2O5 interaction increases the electron density of the Pt particles and enhances interband transition of Pt electrons by absorbing visible light. A large number of photogenerated e(hot)(-) directly activate O2 on the Pt surface and produce active oxygen species, thus promoting highly efficient aerobic oxidation at room temperature.

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Supported Au–Cu Bimetallic Alloy Nanoparticles: An Aerobic Oxidation Catalyst with Regenerable Activity by Visible‐Light Irradiation

Cited by 182 publications

References 36 publications

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

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

Solar-Powered Plasmon-Enhanced Heterogeneous Catalysis

Hot-Electron-Induced Highly Efficient O₂ Activation by Pt Nanoparticles Supported on Ta₂O₅ Driven by Visible Light

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Supported Au–Cu Bimetallic Alloy Nanoparticles: An Aerobic Oxidation Catalyst with Regenerable Activity by Visible‐Light Irradiation

Cited by 182 publications

References 36 publications

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

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

Solar-Powered Plasmon-Enhanced Heterogeneous Catalysis

Hot-Electron-Induced Highly Efficient O2 Activation by Pt Nanoparticles Supported on Ta2O5 Driven by Visible Light

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Product

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Hot-Electron-Induced Highly Efficient O₂ Activation by Pt Nanoparticles Supported on Ta₂O₅ Driven by Visible Light