Single-Particle Study of Pt-Modified Au Nanorods for Plasmon-Enhanced Hydrogen Generation in Visible to Near-Infrared Region

Zheng, Zhaoke; Tachikawa, Takashi; Majima, Tetsuro

doi:10.1021/ja502704n

Cited by 445 publications

(529 citation statements)

References 29 publications

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“…Zheng et al successfully synthesized Pt-covered and Pt-tipped AuNRs by anisotropic overgrowth and used them for plasmon-enhanced hydrogen generation in the visible to NIR region (Figure 11e). [119] The Pt-tipped AuNRs exhibited a much higher photocatalytic H 2 generation performance compared with the fully Pt-covered AuNRs because of the efficient transfer of plasmon-generated hot electrons from the excited Au to Pt. Under monochromatic light irradiation, the apparent quantum efficiency (AQE) of Pt-tipped AuNRs equaled 0.51% at 540 nm and 0.68% at 940 nm, respectively.…”

Section: Wwwadvopticalmatdementioning

confidence: 99%

Hot‐Electron‐Mediated Photochemical Reactions: Principles, Recent Advances, and Challenges

Kim

Lin

Son

et al. 2017

Advanced Optical Materials

167

116

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Hot electron chemistry has drawn tremendous attention from applications related to materials, energy, sensing, and catalysis. The plasmon‐induced generation of hot electrons and their transfer behavior are very important for understanding plasmonic‐enhanced applications and for achieving practically useful efficiency. From a plasmonic perspective, well‐designed plasmonic structures that can manipulate surface plasmons are able to enhance the efficiencies of hot electron‐based processes. This progress report summarizes the recent experimental and theoretical advances on the hot electron effect, emphasizing the crucial role of surface plasmons that are highly designable by using metal nanostructures. In particular, recent breakthroughs in the emerging fields of heterogeneous catalysis based on the hot electron effect are highlighted. Important design principles, mechanisms, and concepts, as well as challenges and perspectives, are illustrated and discussed.

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Section: Wwwadvopticalmatdementioning

confidence: 99%

Hot‐Electron‐Mediated Photochemical Reactions: Principles, Recent Advances, and Challenges

Kim

Lin

Son

et al. 2017

Advanced Optical Materials

167

116

View full text Add to dashboard Cite

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“…The light energy absorbed by Au were directly transferred to Pd and both plasmonic photocatalysis and local heating contributed to the overall catalytic process [137,138]. Other important Pd-catalyzed cross coupling reactions for the formation of C-C bonds (e.g., Sonogashira, Stille, Hiyama, Ullmann, and Buchwald-Hartwig reactions) have been performed by using Pd-Au alloys under visible light illumination at lower temperature than that required by pure thermal-driven processes [139]. Au nanorods decorated with Pt or Pd nanocrystals have been tested as bimetallic catalysts for H 2 plasmon-driven production and for formic acid dehydrogenation reaction [140,141].…”

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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“…This effect may be related to the partial charge transfer from Pt to Au due to the higher electronegativity of the Au element, which leads to the formation of bimetallic PtAu alloy crystals. 38 The charge transfer from Pt to Au results in the change of the electronic structure and a down-shifting of the d-band center of Pt-based alloy materials, which will enhance the adsorption/desorption capability of reaction species on the Pt-based alloy nanocatalyst surface. The surface atom ratio of Pt/Au is 19:17 from the XPS analysis, which is roughly in agreement with that obtained by EDX analysis.…”

Section: Morphological and Structural Characterizationmentioning

confidence: 99%

PtAu alloy nanoflowers on 3D porous ionic liquid functionalized graphene-wrapped activated carbon fiber as a flexible microelectrode for near-cell detection of cancer

et al. 2016

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Recent advances in flexible fiber-based microelectrodes have opened a new horizon for sensitive real-time near-cell and even intracellular measurements. In this work, we develop a new type of hierarchical nanohybrid microelectrode based on three-dimensional (3D) porous graphene-wrapped activated carbon fiber (ACF) via a facile and effective electrodeposition of graphene oxide (GO) nanosheets on ACF using a green ionic liquid (IL) as the electrolyte. This technique enables the simultaneous electrodeposition and electrochemical reduction of GO nanosheets on ACF to form 3D porous IL functionalized electrochemically reduced GO (ERGO)-wrapped ACF (IL-ERGO/ACF). The adsorbed IL molecules on the ERGO surface provide sufficient active sites and act as the template for the in situ electrodeposition of highly dense and well-dispersed bimetal PtAu nanoflowers on the 3D IL-ERGO scaffold. By virtue of the unique array of structural and chemical properties of bimetal PtAu nanocatalysts and 3D porous IL-ERGO on ACF, the resultant PtAu nanoflowers-decorated IL-ERGO/ACF (PtAu/IL-ERGO/ACF) microelectrode demonstrates a variety of excellent sensing performances, including high sensitivity, a wide linear range and good selectivity in the electrochemical detection of a newly emerged cancer biomarker, hydrogen peroxide (H 2 O 2 ). When used for the real-time tracking of H 2 O 2 secreted from female cancer cells, such as breast cancer cells and gynecological cancer cells, the electrochemical sensor based on the PtAu/IL-ERGO/ACF microelectrode provides important information for distinguishing between different cancer cells and normal cells and for evaluating the therapeutic activity of antitumor drugs towards live cancer cells, which are of great clinical significance for cancer diagnosis and management.

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Single-Particle Study of Pt-Modified Au Nanorods for Plasmon-Enhanced Hydrogen Generation in Visible to Near-Infrared Region

Cited by 445 publications

References 29 publications

Hot‐Electron‐Mediated Photochemical Reactions: Principles, Recent Advances, and Challenges

Hot‐Electron‐Mediated Photochemical Reactions: Principles, Recent Advances, and Challenges

Solar-Powered Plasmon-Enhanced Heterogeneous Catalysis

PtAu alloy nanoflowers on 3D porous ionic liquid functionalized graphene-wrapped activated carbon fiber as a flexible microelectrode for near-cell detection of cancer

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