The facet-dependent enhanced catalytic activity of Pd nanocrystals

Kim, Minjune; Kim, Yeonjoon; Hong, Jong Wook; Ahn, Seihwan; Kim, Woo Youn; Han, Sang Woo

doi:10.1039/c4cc02494j

Cited by 44 publications

(39 citation statements)

References 34 publications

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“…[1][2][3][4] Motivated by achieving additional properties that arise from combining monometallic constituents on the nanoscale, noble-metalbased bimetallic alloy nanoparticles (NPs) have gained much interest. [1][2][3][4] Motivated by achieving additional properties that arise from combining monometallic constituents on the nanoscale, noble-metalbased bimetallic alloy nanoparticles (NPs) have gained much interest.…”

Section: Introductionmentioning

confidence: 99%

“…Noble metals, such as platinum (Pt), gold (Au), palladium (Pd), and silver (Ag) have attracted attention because of their unique electric, optical, and catalytic properties. [1][2][3][4] Motivated by achieving additional properties that arise from combining monometallic constituents on the nanoscale, noble-metalbased bimetallic alloy nanoparticles (NPs) have gained much interest. [5][6][7][8] Furthermore,a lloying with other non-noblem etals, such as transition metals or base metals,g enerally lowers the cost.…”

Section: Introductionmentioning

confidence: 99%

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Laser‐Irradiation‐Induced Melting and Reduction Reaction for the Formation of Pt‐Based Bimetallic Alloy Particles in Liquids

Han

Dai

et al. 2017

ChemPhysChem

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Laser melting in liquids (LML) is one of the most effective methods to prepare bimetallic alloys; however, despite being an ongoing focus of research, the process involved in the formation of such species remains ambiguous. In this paper, we prepared two types of Pt-based bimetallic alloys by LML, including Pt-Au alloys and Pt-iron group metal (iM=Fe/Co/Ni) alloys, and investigated the corresponding mechanisms of alloying process. Detailed component and structural characterizations indicate that laser irradiation induced a quite rapid formation process (not exceeding 10 s) of Pt-Au alloy nanospheres, and the crystalline structures of Pt-Au alloys is determined by the monometallic constituents with higher content. For Pt-iM alloys, we provide direct evidence to support the conclusion that FeO /CoO /NiO colloids can be reduced to elementary Fe/Co/Ni particles by ethanol molecules during laser irradiation, which then react with Pt colloids to form Pt-iM sub-microspheres. These results demonstrate that LML provides an optional route to prepare Pt-based bimetallic alloy particles with tunable size, components, and crystalline phase, which should have promising applications in biological and catalysis studies.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Laser‐Irradiation‐Induced Melting and Reduction Reaction for the Formation of Pt‐Based Bimetallic Alloy Particles in Liquids

Han

Dai

et al. 2017

ChemPhysChem

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“…The first one is the surface faceting of the nanoparticle as shown in Fig. 4(a), as the facets have a high density of low-coordinated atoms such as steps and edges containing the sites with high catalytic activity [28]. The HAADF image also shows a clear edge at the atomic scale.…”

Section: Resultsmentioning

confidence: 97%

Structural and chemical characterization of novel NixZn1−xGa2O4 nanocatalysts at atomic resolution

Hong

et al. 2015

Applied Surface Science

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“…Examples include those based on Ag for the epoxidation of ethylene (60, 61), Au for the reduction of 4-nitroaniline (62), and Pd for Suzuki cross-coupling (16) and Buchwald-Hartwig amination (63). The most studied system is hydrogenation, which involves the insertion of H atoms into an unsaturated chemical bond.…”

Section: Hydrogenation and Other Types Of Reactionsmentioning

confidence: 99%

Shape-Controlled Metal Nanocrystals for Heterogeneous Catalysis

Ruditskiy

Peng

Xia

2016

Annu. Rev. Chem. Biomol. Eng.

100

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The ability to control the shape of metal nanocrystals allows us to not only maneuver their physicochemical properties but also optimize their activity in a variety of applications. Heterogeneous catalysis, in particular, would benefit tremendously from the availability of metal nanocrystals with controlled shapes and well-defined facets or surface structures. The immediate benefits may include significant enhancements in catalytic activity and/or selectivity along with reductions in the materials cost. We provide a brief account of recent progress in the development of metal nanocrystals with controlled shapes and thereby enhanced catalytic performance for several reactions, including formic acid oxidation, oxygen reduction, and hydrogenation. In addition to monometallic nanocrystals, we also cover a bimetallic system, in which the two metals are formulated as alloyed, core-shell, or core-frame structures. We hope this article will provide further impetus for the development of next-generation heterogeneous catalysts essential to a broad range of applications.

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The facet-dependent enhanced catalytic activity of Pd nanocrystals

Abstract: A systematic study of heterogeneous Buchwald-Hartwig amination using shape-controlled Pd nanocrystals with distinctly different surface facets is presented.

Cited by 44 publications

References 34 publications

Laser‐Irradiation‐Induced Melting and Reduction Reaction for the Formation of Pt‐Based Bimetallic Alloy Particles in Liquids

Laser‐Irradiation‐Induced Melting and Reduction Reaction for the Formation of Pt‐Based Bimetallic Alloy Particles in Liquids

Structural and chemical characterization of novel NixZn1−xGa2O4 nanocatalysts at atomic resolution

Shape-Controlled Metal Nanocrystals for Heterogeneous Catalysis

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