XPS, ISS and TPD study of Pd–Sn interactions on Pd–SnO  systems

Tsud, Nataliya; Johánek, Viktor; Stará, I.; Veltruská, Kateřina; Matolín, Vladimı́r

doi:10.1016/s0040-6090(01)00983-x

Cited by 50 publications

(28 citation statements)

References 30 publications

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“…At least for catalytic studies this also includes Pd-based systems and specifically, also Pd-Sn bimetallics and compounds [2][3][4][5][6][7][8][9][10]. From the catalytic point of view, Pd-Sn catalysts have been exploited in a number of reactions, including e.g.…”

Section: Introductionmentioning

confidence: 99%

“…CO oxidation [2,4,7] or toluene acetoxylation [10] (among others). The specific properties are usually interpreted in terms of a promoting strong metalsupport interaction linked to alloy formation between Pd and Sn, leading to an altered noble metal-like electronic structure with respect to clean Pd [9,11]. In contrast, e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Naturally, this interest in catalytic activity and selectivity is coupled with the preparation and characterization of different Pd-Sn catalysts. This includes oxide-supported Pd-Sn particles prepared by solvated metal atom dispersion [5], thin film and single-crystal studies [8,9,11] or impregnated systems [2].…”

Section: Introductionmentioning

confidence: 99%

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Origin of different deactivation of Pd/SnO2 and Pd/GeO2 catalysts in methanol dehydrogenation and reforming: A comparative study

Lorenz

Zhao

Turner

et al. 2010

Applied Catalysis A: General

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Pd particles supported on SnO2 and GeO2 have been structurally investigated by X-ray diffraction, (High-Resolution) transmission and scanning electron microscopy after different reductive treatments to monitor the eventual formation of bimetallic phases and catalytically tested in methanol dehydrogenation/reforming. For both oxides this included a thin film sample with well-defined Pd particles and a powder catalyst prepared by incipient wetness impregnation. The hexagonal and the tetragonal polymorph were studied for powder GeO2. Pd2Ge formation was observed on all GeO2-supported catalysts, strongly depending on the specific sample used. Reduction of the thin film at 573 K resulted in full transformation into the bimetallic state. The partial solubility of hexagonal GeO2 in water and its thermal structural instability yielded Pd2Ge formation at 473 K, at the cost of a structurally inhomogeneous support and Ge metal formation at higher reduction temperatures. Pd on tetragonal GeO2 entered a state of strong metal-support interaction after reduction at 573-673 K, resulting in coalescing Pd2Ge particles on a sintered and re-crystallized support, apparently partially covering the bimetallic particles and decreasing the catalytic activity. Pd2Ge on amorphous thin film and hexagonal GeO2 converted methanol primarily via dehydrogenation to CO and H2. At 573 K, formation of Pd2Sn and also PdSn occurred on the Pd/SnO2 thin film. Pd3Sn2 (and to some extent Pd2Sn) were predominantly obtained on the respective powder catalyst. Strong deactivation with increasing reduction temperature was observed, likely not based on the classical strong metal-support interaction effect, but rather on a combination of missing active structural ensembles on Sn-enriched bimetallic phases and the formation of metallic β-Sn. Correlations to Pd and its bimetallics supported on ZnO, Ga2O3 and In2O3 were also discussed.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Origin of different deactivation of Pd/SnO2 and Pd/GeO2 catalysts in methanol dehydrogenation and reforming: A comparative study

Lorenz

Zhao

Turner

et al. 2010

Applied Catalysis A: General

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show abstract

“…This observation could seem unlikely because both (c) and (d) samples were treated in oxygen, however in agreement with our previous observation it can be explained by a Pd-Sn bimetallic interaction • represent experimental data, solid lines represent peak fits. [13,28,29] weakening the Sn-O bond and reducing the tin oxide surface.…”

Section: Resultsmentioning

confidence: 99%

“…There are usually two methods of creating the Pd-Sn bimetallic particles: a deposition of Pd and Sn on an inert support (alumina, silica) [12] or Pd deposition on SnO 2 where Pd-Sn bonds form [13]. The bimetallic Pd-Sn system is characterised by a strong interaction between Pd and Sn, through the hybridisation of the Pd d-and Sn sporbitals, leading to the formation of Pd-Sn alloys of noble metal-like electronic structure.…”

Section: Introductionmentioning

confidence: 99%

Study of palladium interaction with magnetron sputtered SnO2 films

Matolín

Mori

Yoshitake

2006

e-J. Surf. Sci. Nanotechnol.

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In this work we investigate the possibility to prepare Pd/SnO2 systems by impregnating magnetron sputtered tin oxide layers with palladium using Pd(acac)2 precursor. XRD studies show that as deposited layers are nanocrystalline exhibiting a lack of oxygen. The annealing in oxygen leads to the formation of polycrystalline nearly stoichiometric SnO2 films. High resolution SEM shows that palladium deposition results in a formation of Pd nanosized particles interacting with the SnO2 surface. XPS analysis proofs that strong metal-substrate interaction is responsible for a partial formation of the SnO surface phase even in the case of the oxygen annealed Pd/SnO2 system.

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In Situ Synthesis of the Peapod‐Like Cu–SnO₂@Copper Foam as Anode with Excellent Cycle Stability and High Area Specific Capacity

Liu

et al. 2021

Adv Funct Materials

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The theoretical specific capacity of tin oxide (SnO2) anode material is more than twice that of graphite material (782 vs 372 mAh g–1), whereas its potential usage is limited fatally by its huge volume expansion during lithiation. An effective solution is to encapsulate tin oxide into hollow structure such as yolk‐shell based on the principle of confinement. However, in light of the restricted space of active substance, this kind of hollow electrode always has the low capacity, severely limiting its commercial value. Herein, a peapod‐like Cu‐SnO2@copper foam (CF) as high area specific capacity anode based on the Kirkendall effect, in which the “pod and peas” in the peapod‐like structure are composed of SnO2 and Cu nanoparticles, respectively, is tactfully designed and constructed. Compared to other SnOx‐based electrodes with different hollow structure designs in published reports, the unique peapod‐like Cu‐SnO2@CF anode delivers a remarkably high first reversible capacity of 5.80 mAh cm‐2 as well as excellent cycle stability with 66.7% capacity retention and ≈100% coulombic efficiency after 200 cycles at a current density of 1 mA cm–2, indicative of its quite promising application toward high‐performance lithium‐ion batteries.

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XPS, ISS and TPD study of Pd–Sn interactions on Pd–SnO systems

Cited by 50 publications

References 30 publications

Origin of different deactivation of Pd/SnO2 and Pd/GeO2 catalysts in methanol dehydrogenation and reforming: A comparative study

Origin of different deactivation of Pd/SnO2 and Pd/GeO2 catalysts in methanol dehydrogenation and reforming: A comparative study

Study of palladium interaction with magnetron sputtered SnO2 films

In Situ Synthesis of the Peapod‐Like Cu–SnO₂@Copper Foam as Anode with Excellent Cycle Stability and High Area Specific Capacity

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XPS, ISS and TPD study of Pd–Sn interactions on Pd–SnO systems

Cited by 50 publications

References 30 publications

Origin of different deactivation of Pd/SnO2 and Pd/GeO2 catalysts in methanol dehydrogenation and reforming: A comparative study

Origin of different deactivation of Pd/SnO2 and Pd/GeO2 catalysts in methanol dehydrogenation and reforming: A comparative study

Study of palladium interaction with magnetron sputtered SnO2 films

In Situ Synthesis of the Peapod‐Like Cu–SnO2@Copper Foam as Anode with Excellent Cycle Stability and High Area Specific Capacity

Contact Info

Product

Resources

About

In Situ Synthesis of the Peapod‐Like Cu–SnO₂@Copper Foam as Anode with Excellent Cycle Stability and High Area Specific Capacity