Pt-Cu Core-Shell and Alloy Nanoparticles for Heterogeneous NOx Reduction: Anomalous Stability and Reactivity of a Core-Shell Nanostructure

Zhou, Shenghu; Varughese, Bindhu; Eichhorn, Bryan W.; Jackson, Gregory S.; McIlwrath, Kevin

doi:10.1002/anie.200500919

Cited by 237 publications

(169 citation statements)

References 24 publications

(27 reference statements)

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“…Eichhorn and co-workers demonstrated that, although γ -Al 2 O 3 supported Cu@Pt core/shell nanoparticles have high catalytic activity for NO reduction equal to that of pure Pt nanoparticles, the novel bimetallic core/shell nanocatalysts show signifi cantly greater selectivity for N 2 formation. [ 101 ] More excitedly, noble metal-based catalysts can be completely replaced by non-precious metal alloy catalysts in some cases. Studt et al performed DFT calculations to identify relations in heats of adsorption of hydrocarbon molecules and fragments on metal surfaces and suggested that Ni-Zn alloys might be alternatives for selective hydrogenation of acetylene instead of Pd-Ag catalysts which are mostly used in modern industry.…”

Section: Heterogeneous Catalysismentioning

confidence: 99%

Bimetallic Nanocrystals: Liquid‐Phase Synthesis and Catalytic Applications

2011

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Bimetallic nanocrystals (NCs) with core/shell, heterostructure, or inter-metallic and alloyed structures are emerging as more important materials than monometallic NCs. They are expected to display not only a combination of the properties associated with two distinct metals, but also new properties and capabilities due to a synergy between the two metals. More importantly, bimetallic NCs usually show composition-dependent surface structure and atomic segregation behavior, and therefore more interesting applied potentials in various fields including electronics, engineering, and catalysis. Compared with monometallic NCs, preparation of bimetallic NCs is much more complicated and difficult to be achieved. In recent years, researchers from many groups have made great efforts in this area. This review highlights the recent progress in the chemical synthesis of bimetallic NCs. The control over morphology, size, composition, and structure of bimetallic NCs as well as the exploration of their properties and applications are discussed.

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Section: Heterogeneous Catalysismentioning

confidence: 99%

Bimetallic Nanocrystals: Liquid‐Phase Synthesis and Catalytic Applications

2011

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“…Dealloyed Pt-Cu core-shell nanoparticles were prepared by selective dissolution of Cu atoms from nanoparticle surfaces and have demonstrated surface catalytic improvement towards oxygen reduction [12,13]. It was proposed that a reduced Pt-Pt distance near the particle surface stabilized by the lattice contracted alloy core might be responsible for the surface catalytic reactivity.…”

Section: Introductionmentioning

confidence: 99%

Ni@Pt core–shell nanoparticles with enhanced catalytic activity for oxygen reduction reaction

Wang

Wexler

et al. 2010

Journal of Alloys and Compounds

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“…However, each kind of metal magnetic nanoparticles has its intrinsic properties and usually can be used only in a specified frequency range. To meet the above requirements, the development of composite metal nanoparticles which combine two or more components in each individual particle to modify the bulk properties [6][7][8][9][10][11] or the surface properties may be an efficient strategy [12][13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%