Pt–Au Triangular Nanoprisms with Strong Dipole Plasmon Resonance for Hydrogen Generation Studied by Single-Particle Spectroscopy

Lou, Zaizhu; Fujitsuka, Mamoru; Majima, Tetsuro

doi:10.1021/acsnano.6b02494

Cited by 160 publications

(182 citation statements)

References 30 publications

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“…Extinction spectrum of the Au NPs shows a broad plasmon resonance peak at 520 nm (Figure S13, Supporting Information). It is expected that the plasmon resonance induced hot electrons in Au NPs may lead to water reduction for hydrogen production . The mixture of Au NPs and ZnSe NRs show a lower hydrogen generation rate of 51.5 µmol h −1 g −1 compared with that of pure Au NPs (Figure a).…”

Section: Resultsmentioning

confidence: 97%

Nonepitaxial Gold‐Tipped ZnSe Hybrid Nanorods for Efficient Photocatalytic Hydrogen Production

Chen

Wang

et al. 2019

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For the first time, colloidal gold (Au)–ZnSe hybrid nanorods (NRs) with controlled size and location of Au domains are synthesized and used for hydrogen production by photocatalytic water splitting. Au tips are found to grow on the apices of ZnSe NRs nonepitaxially to form an interface with no preference of orientation between Au(111) and ZnSe(001). Density functional theory calculations reveal that the Au tips on ZnSe hybrid NRs gain enhanced adsorption of H compared to pristine Au, which favors the hydrogen evolution reaction. Photocatalytic tests reveal that the Au tips on ZnSe NRs effectively enhance the photocatalytic performance in hydrogen generation, in which the single Au‐tipped ZnSe hybrid NRs show the highest photocatalytic hydrogen production rate of 437.8 µmol h−1 g−1 in comparison with a rate of 51.5 µmol h−1 g−1 for pristine ZnSe NRs. An apparent quantum efficiency of 1.3% for hydrogen evolution reaction for single Au‐tipped ZnSe hybrid NRs is obtained, showing the potential application of this type of cadmium (Cd)‐free metal–semiconductor hybrid nanoparticles (NPs) in solar hydrogen production. This work opens an avenue toward Cd‐free hybrid NP‐based photocatalysis for clean fuel production.

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Section: Resultsmentioning

confidence: 97%

Nonepitaxial Gold‐Tipped ZnSe Hybrid Nanorods for Efficient Photocatalytic Hydrogen Production

Chen

Wang

et al. 2019

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“…As shown in Figure a, Au NRs with the average length and width of 45±6 and 8±2 nm respectively were prepared, exhibiting a LSPR peak centered at 804 nm approximately (Figure f). A small quantity of anisotropic Pd nanoparticles overgrows on the ends of the Au NRs selectively, and their LSPR peak occurs a distinct red shift, which was ascribed to the relative changes in size and vibration of surface free electrons . Pd‐covered Au NRs were produced by increasing the amount of H 2 PdCl 4 , the LSPR band also shows a red shift centered at 824 nm and an apparently intensity decrease compared with pure Au NRs, suggesting more amounts of Pd loaded on the surface of Au NRs.…”

Section: Resultsmentioning

confidence: 99%

“…They found that this catalyst exhibited a plasmonic optical property and higher catalytic activity in ethanol oxidation reaction (EOR), due to the upshift of the Pt d‐band energy induced by Au substrate . Pt−Au triangular nanoprisms prepared via adjusting the amounts of the iodide ions were used in H 2 production, charge transferring between Au and Pt accelerates the catalytic activity . According to the above researches, the catalytic performance were optimized by introducing active materials, through charge transfer between different metals, lattice strain, changes of electronic structures.…”

Section: Introductionmentioning

confidence: 99%

Pd‐Tipped Au Nanorods for Plasmon‐Enhanced Electrocatalytic Hydrogen Evolution with Photoelectric and Photothermal Effects

2018

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Plasmonic bimetallic structures have been wildly used in photocatalysis, owing to their tunable optical properties and desirable catalytic activities. However, it is still a challenge to realize the enhanced electrocatalytic hydrogen evolution reaction (HER) using these structures with electric, photo‐, and thermal effects. Herein, we report that Pd‐tipped Au nanorods (NRs) were prepared for electrochemical water splitting in the visible and near‐infrared region. The NRs exhibited a lower onset overpotential (40 mV) and high exchange current density (1.585 mA/cm2), which was largely ascribed to the increased carrier density in Pd induced by photo‐excited Au NRs, and further enhancement of Pd catalytic activity resulted from the photothermal effect of Au NRs. As the hot electron transport channel was hindered by excess Pd nanoparticles, it was found that the HER performance of tipped NRs was much higher than that of fully covered ones. This study extends enhanced electrocatalytic HER activity with plasmonic bimetallic structures by taking full advantage of the synergy between photoelectric and photothermal effects.

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“…Ag nanoplates [176][177][178][179] or nanoprisms [180][181][182][183][184][185], which form nanorings and nanoframes, respectively. Although there are various types according to shape, they all have in common excellent NIR photothermal conversion efficiencies, which is advantageous for in vivo cancer treatment, and are easy to load with relatively bulky cargoes both inside and outside due to their surface opened skeletal nanostructures.…”

Section: Nanoframesmentioning

confidence: 99%

Recent Advances in Nanoparticle Shape and Composition Regulation Based on Galvanic Replacement for Cancer Treatment

Shin¹,

Kang²,

Jang³

2018

Preprint

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Owing to their unique physicochemical properties, nanoparticles are used in a variety of ways in the field of cancer treatment, including imaging, drug delivery, and photothermal and photodynamic therapies. The fascinating properties of nanoparticles are determined by their size, morphology, and constituent elements, and various synthetic methods and post-synthetic techniques have been applied to control these factors. Herein, we present examples of shape and composition control through galvanic replacement, a technique that exploits redox potential differences between elements to induce spontaneous ion-exchange and highlight its specific contributions to cancer treatment applications. The present article identifies the recent advances in nanoparticle formation techniques and discusses the future outlook of the field.

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Pt–Au Triangular Nanoprisms with Strong Dipole Plasmon Resonance for Hydrogen Generation Studied by Single-Particle Spectroscopy

Cited by 160 publications

References 30 publications

Nonepitaxial Gold‐Tipped ZnSe Hybrid Nanorods for Efficient Photocatalytic Hydrogen Production

Nonepitaxial Gold‐Tipped ZnSe Hybrid Nanorods for Efficient Photocatalytic Hydrogen Production

Pd‐Tipped Au Nanorods for Plasmon‐Enhanced Electrocatalytic Hydrogen Evolution with Photoelectric and Photothermal Effects

Recent Advances in Nanoparticle Shape and Composition Regulation Based on Galvanic Replacement for Cancer Treatment

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