Gold-catalyzed formation of core–shell gold–palladium nanoparticles with palladium shells up to three atomic layers

Chen, Dong; Li, Jiaqi; Cui, Penglei; Liu, Hui; Yang, Jun

doi:10.1039/c5ta10303g

Cited by 67 publications

(52 citation statements)

References 54 publications

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“…The AuNPs had a polycrystalline phase with a lattice fringe spacing of 0.24 nm, which corresponds to the (111) plane of face-centered cubic Au, as shown in a high-resolution transmission electron microscope (TEM) image (Fig. 2b ) 39 . The average diameter of AuNPs was 37.6 ± 3.37 nm, as measured from 140 particles from TEM images (Fig.…”

Section: Resultsmentioning

confidence: 97%

Multilayered Plasmonic Heterostructure of Gold and Titania Nanoparticles for Solar Fuel Production

Kim

Son

Nam

2018

Sci Rep

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Solar fuel production via photoelectrochemical (PEC) water splitting has attracted great attention as an approach to storing solar energy. However, a wide range of light-harvesting materials is unstable when exposed to light and oxidative conditions. Here we report a robust, multilayered plasmonic heterostructure for water oxidation using gold nanoparticles (AuNPs) as light-harvesting materials via localized surface plasmon resonance (LSPR). The multilayered heterostructure is fabricated using layer-by-layer self-assembly of AuNPs and TiO2 nanoparticles (TNPs). Plasmon-induced hot electrons are transferred from AuNPs to TNPs over the Au/TiO2 Schottky barrier, resulting in charge separation of hot carriers. Plasmonic photoanodes for water oxidation are completed by incorporating a Co-based oxygen-evolving catalyst on the multilayered heterostructure to scavenge hot holes. Light absorption capability and PEC properties of the photoanodes are investigated as a function of the number of AuNP/TNP bilayers. The PEC properties exhibits dependence on the number of the bilayers, which is affected by charge transport within the multilayered heterostructures. Photocurrent density and decrease in impedance by irradiation indicates significant photoactivity by LSPR excitation.

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Section: Resultsmentioning

confidence: 97%

Multilayered Plasmonic Heterostructure of Gold and Titania Nanoparticles for Solar Fuel Production

Kim

Son

Nam

2018

Sci Rep

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“…As has been demonstrated previously, in core-shell Au-Pd nanoparticles, the Au cores impose strong lattice strain effect on the thin Pd shells due to the lattice mismatch. The lattice strain between the Au cores and Pd shells would affect the d-band center of the latter, and therefore alter their reactivity by changing the electronic properties of the Pd atoms 24 31 . In addition, the difference in electronegativities of the Au core (2.54) and the Pd (2.20) shell may imply potential electron-withdrawing effect from Au cores to the neighboring Pd shells, and this electronic coupling could also induce the change of the electronic structure of Pd atoms.…”

Section: Resultsmentioning

confidence: 99%

Core-shell Au-Pd nanoparticles as cathode catalysts for microbial fuel cell applications

Yang

Chen

et al. 2016

Sci Rep

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Bimetallic nanoparticles with core-shell structures usually display enhanced catalytic properties due to the lattice strain created between the core and shell regions. In this study, we demonstrate the application of bimetallic Au-Pd nanoparticles with an Au core and a thin Pd shell as cathode catalysts in microbial fuel cells, which represent a promising technology for wastewater treatment, while directly generating electrical energy. In specific, in comparison with the hollow structured Pt nanoparticles, a benchmark for the electrocatalysis, the bimetallic core-shell Au-Pd nanoparticles are found to have superior activity and stability for oxygen reduction reaction in a neutral condition due to the strong electronic interaction and lattice strain effect between the Au core and the Pd shell domains. The maximum power density generated in a membraneless single-chamber microbial fuel cell running on wastewater with core-shell Au-Pd as cathode catalysts is ca. 16.0 W m−3 and remains stable over 150 days, clearly illustrating the potential of core-shell nanostructures in the applications of microbial fuel cells.

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“…Optimization of the bimetallic catalyst can further enhance the selectivity and efficiency of CO 2 reduction . Furthermore, the core–shell nanoparticles Au@Pd up to three atomic layers exhibit excellent catalytic activity leading to formic acid …”

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confidence: 99%

A Monodispersed Spherical Zr‐Based Metal–Organic Framework Catalyst, Pt/Au@Pd@UIO‐66, Comprising an Au@Pd Core–Shell Encapsulated in a UIO‐66 Center and Its Highly Selective CO₂ Hydrogenation to Produce CO

Zheng

et al. 2017

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A Zr-based metal-organic framework (MOF) catalyst, Pt/Au@Pd@UIO-66, is assembled, where UIO-66 is Zr O (OH) (BDC) (BDC = 1,4-benzenedicarboxylate). The gold nanoparticles (NPs) act as the core for the epitaxial growth of Pd shells, and the core-shell monodispersed nanosphere Au@Pd is encapsulated into UIO-66 to control its morphology and impart nanoparticle functionality. The microporous nature of UIO-66 assists the adsorption of Pt NPs, which in turn enhances the interaction between NPs and UIO-66, favoring the formation of isolated and well-dispersed Pt NP active sites. This MOF exhibits high catalytic activity and CO product selectivity for the reverse-water-gas-shift reaction in a fixed-bed flow reactor.

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Gold-catalyzed formation of core–shell gold–palladium nanoparticles with palladium shells up to three atomic layers

Abstract: A gold-catalyzed strategy was reported to synthesize core–shell gold–palladium nanoparticles with palladium shells up to three atomic layers.

Cited by 67 publications

References 54 publications

Multilayered Plasmonic Heterostructure of Gold and Titania Nanoparticles for Solar Fuel Production

Multilayered Plasmonic Heterostructure of Gold and Titania Nanoparticles for Solar Fuel Production

Core-shell Au-Pd nanoparticles as cathode catalysts for microbial fuel cell applications

A Monodispersed Spherical Zr‐Based Metal–Organic Framework Catalyst, Pt/Au@Pd@UIO‐66, Comprising an Au@Pd Core–Shell Encapsulated in a UIO‐66 Center and Its Highly Selective CO₂ Hydrogenation to Produce CO

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Gold-catalyzed formation of core–shell gold–palladium nanoparticles with palladium shells up to three atomic layers

Abstract: A gold-catalyzed strategy was reported to synthesize core–shell gold–palladium nanoparticles with palladium shells up to three atomic layers.

Cited by 67 publications

References 54 publications

Multilayered Plasmonic Heterostructure of Gold and Titania Nanoparticles for Solar Fuel Production

Multilayered Plasmonic Heterostructure of Gold and Titania Nanoparticles for Solar Fuel Production

Core-shell Au-Pd nanoparticles as cathode catalysts for microbial fuel cell applications

A Monodispersed Spherical Zr‐Based Metal–Organic Framework Catalyst, Pt/Au@Pd@UIO‐66, Comprising an Au@Pd Core–Shell Encapsulated in a UIO‐66 Center and Its Highly Selective CO2 Hydrogenation to Produce CO

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A Monodispersed Spherical Zr‐Based Metal–Organic Framework Catalyst, Pt/Au@Pd@UIO‐66, Comprising an Au@Pd Core–Shell Encapsulated in a UIO‐66 Center and Its Highly Selective CO₂ Hydrogenation to Produce CO