Probing the interactions of Pt, Rh and bimetallic Pt–Rh clusters with the TiO2(110) support

Öztürk, Osman; Park, J. B.; Ma, Shuguo; Ratliff, Jay S.; Zhou, Jing; Mullins, David R.; Chen, Donna

doi:10.1016/j.susc.2007.05.030

Cited by 36 publications

(69 citation statements)

References 72 publications

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“…The existence of this fluctuation may be possible, since significant movement of metal atoms within small clusters at room temperature was observed in several cases [10,49,50] characterized by diffusion coefficients many orders of magnitude higher than the corresponding bulk values. Anyhow, further studies are needed to understand in detail the CO induced restructuring of Rh-Au clusters.…”

Section: Results Obtained On Titanate Nanowires and Nanotubesmentioning

confidence: 99%

Structure and reactivity of Au–Rh bimetallic clusters on titanate nanowires, nanotubes and TiO2(110)

et al. 2012

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a b s t r a c tAu and Rh clusters, as well as Au-Rh bimetallic nanoparticles were prepared on titanate nanowires, nanotubes and on TiO 2 (1 1 0). They were characterized by X-ray photoelectron spectroscopy (XPS), low energy ion scattering spectroscopy (LEIS) and Fourier transform infrared spectroscopy (FTIR). By performing careful LEIS experiments, it was found that for appropriate Au and Rh coverage, a thin Au layer almost completely covers the Rh nanoparticles, a Rh core-Au shell structure was detected. The formation of this structure was not affected by alkali (K) adatoms. LEIS and FTIR measurements disclosed that adsorbed CO at 300 K causes the segregation of Rh atoms to the surface of metal clusters in order to bind to CO. Upon CO adsorption on Rh/titanate nanostructures the IR stretching frequencies characteristic of the twin form were dominant, whereas bimetallic nanosystems featured a pronounced linear stretching vibration as well. In spite of this structure adsorbed CO is detectable during the ethanol adsorption on gold-rhodium bimetallic cluster and the ethanol decomposition rate is twice higher than on Au/TiO 2 .

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Section: Results Obtained On Titanate Nanowires and Nanotubesmentioning

confidence: 99%

Structure and reactivity of Au–Rh bimetallic clusters on titanate nanowires, nanotubes and TiO2(110)

et al. 2012

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show abstract

“…The existence of this fluctuation may be possible, since significant movement of metal atoms within small clusters at room temperature was observed in several cases characterized by diffusion coefficients many orders of magnitude higher than the corresponding bulk values [354,355]. Anyhow, further studies are needed to understand the CO-induced restructuring of Rh-Au clusters in detail.…”

Section: Bimetallic Nanoparticles On Titanate Nanostructuresmentioning

confidence: 99%

Atomic scale characterization and surface chemistry of metal modified titanate nanotubes and nanowires

Kukovecz

Kordás

Kiss

2016

Surface Science Reports

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Titanates are salts of polytitanic acid that can be synthesized as nanostructures in a great variety concerning crystallinity, morphology, size, metal content and surface chemistry.Titanate nanotubes (open-ended hollow cylinders measuring up to 200 nm in length and 15 nm in outer diameter) and nanowires (solid, elongated rectangular blocks with length up to 1500 nm and 30-60 nm diameter) are the most widespread representatives of the titanate nanomaterial family. This review covers the properties and applications of these two materials from the surface science point of view. Dielectric, vibrational, electron and X-ray spectroscopic results are comprehensively discussed first, then surface modification methods including covalent functionalization, ion exchange and metal loading are covered. The versatile surface chemistry of onedimensional titanates renders them excellent candidates for heterogeneous catalytic, photocatalytic, photovoltaic and energy storage applications, therefore, these fields are also reviewed.

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“…It should however be noted that the clusters have unique electronic properties in either their initial or final states, or in both. Therefore the core level shift is always a debatable issue for the small metallic clusters and should not serve as the conclusive evidence for alloying formation [53][54][55]. On the other hand, for the 0.15 ML Ni/ 0.15 ML Au/carbon nanomesh surface (Au deposited first), little difference has been observed for the intensity of Au 4f before and after the deposition of Ni, while the intensity of Ni 2p peak decreases slightly to 87% compared to that of the 0.15 ML Ni/carbon nanomesh surface.…”

Section: Nucleation and Thermal Stability Of Au-ni Clustersmentioning

confidence: 99%

Growth and characterization of Au, Ni and Au–Ni nanoclusters on 6H-SiC(0001) carbon nanomesh

Wang

et al. 2012

Surface Science

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Probing the interactions of Pt, Rh and bimetallic Pt–Rh clusters with the TiO2(110) support

Cited by 36 publications

References 72 publications

Structure and reactivity of Au–Rh bimetallic clusters on titanate nanowires, nanotubes and TiO2(110)

Structure and reactivity of Au–Rh bimetallic clusters on titanate nanowires, nanotubes and TiO2(110)

Atomic scale characterization and surface chemistry of metal modified titanate nanotubes and nanowires

Growth and characterization of Au, Ni and Au–Ni nanoclusters on 6H-SiC(0001) carbon nanomesh

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