Nanoskalige Metall- Wasserstoff- Systeme

Pundt, Astrid

doi:10.17875/gup2005-71

Cited by 16 publications

(6 citation statements)

References 40 publications

(52 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The size dependent kinetics of Pd-hydration have been studied on nano structured materials, 51 thin lms 52 and nano particles. [53][54][55] thermally induced spinodal dewetting in thin Pd layers. 21 However, those experiments were performed in ultra high vacuum (UHV) which completely suppresses the oxide phase.…”

Section: Palladium/palladium Oxidementioning

confidence: 99%

Textures of Au, Pt and Pd/PdO nanoparticles thermally dewetted from thin metal layers on fused silica

2014

View full text Add to dashboard Cite

This article presents results concerning the basic dewetting procedure of thin metal films on an amorphous substrate. Thin layers of gold, platinum and palladium are deposited on fused silica glass sheets by sputtering. The 14 to 18 nm thick layers of Au, Pt and Pd are dewetted into nanoparticles (NP) at temperatures from 424 to 1600 C. The morphology of the resulting NP is characterized using scanning electron microscopy (SEM) while crystallographic analyses are performed using electron backscatter diffraction (EBSD). Multiple textures are described to occur and coexist in NP-layers of the respective materials and a temperature dependence of the texture formation in gold NP is proved. The transformation of Pd to PdO and its effects on the texture is also analyzed. It is shown that the cooling rate has an effect on the texture in the case of gold NP as well as on the physical structure of the Pd/ PdO NP. Twinning relationships could be described to occur on all samples.

show abstract

Section: Palladium/palladium Oxidementioning

confidence: 99%

Textures of Au, Pt and Pd/PdO nanoparticles thermally dewetted from thin metal layers on fused silica

2014

View full text Add to dashboard Cite

show abstract

“…In thin films adhering to a substrate, the volume expansion leads to an in-plane mechanical stress and an out-of-plane strain. In the case of isotropic polycrystalline thin films with strong adhesion to the substrate, the in-plane stress (usually compressive) due to hydrogenation, σ H , is related to c H [21]:…”

Section: Volume Expansion and Mechanical Stress In Thin Films Upon Hymentioning

confidence: 99%

High-throughput characterization of hydrogen storage materials using thin films on micromachined Si substrates

Ludwig

Cao

Savan

et al. 2007

Journal of Alloys and Compounds

View full text Add to dashboard Cite

“…Among the metal hydrides, the Pd–H system has attracted intense research activities, − which is attributed to the high hydrogen solubility at convenient pressures and temperatures. Therefore, the Pd–H system serves as an interesting model system in order to understand the relationship between hydrogen solubility and the atomic and electronic structure of the hydrogen hosting crystal lattice and the role of confinement for the case of Pd nanoparticles.…”

mentioning

confidence: 99%

Hydrogen Solubility and Atomic Structure of Graphene Supported Pd Nanoclusters

et al. 2021

View full text Add to dashboard Cite

We investigated the atomic structure of graphene supported Pd nanoclusters and their interaction with hydrogen up to atmospheric pressures at room temperature by surface X-ray diffraction and scanning tunneling microscopy. We find that Ir seeded Pd nanocluster superlattices with 1.2 nm cluster diameters can be grown on the graphene/Ir(111) moiré template with high structural perfection. The superlattice clusters are anchored through the rehybridized graphene to the Ir support, which superimposes a 2.0% inplane compression onto the clusters. During hydrogen exposure at 10 mbar pressure and room temperature, a significant part of the clusters gets unpinned from the superlattice. The clusters in registry undergo an out-of-plane expansion only, whereas the detached clusters expand in in- and out-of-plane directions. The formation of a hydrogen rich PdH x α′ phase was not observed. After exposure to 1 bar, the majority of the clusters are unpinned from superlattice sites, due to their surface interaction with hydrogen and possible spill over to the graphene support. Only minor sintering was observed, which is more pronounced for the unpinned clusters. The results give evidence that ultrasmall Pd clusters on graphene are a stable hydrogen storage system with reduced hydrogen storage hysteresis and maintain a large surface area for hydrogen chemisorption.

show abstract

Nanoskalige Metall- Wasserstoff- Systeme

Cited by 16 publications

References 40 publications

Textures of Au, Pt and Pd/PdO nanoparticles thermally dewetted from thin metal layers on fused silica

Textures of Au, Pt and Pd/PdO nanoparticles thermally dewetted from thin metal layers on fused silica

High-throughput characterization of hydrogen storage materials using thin films on micromachined Si substrates

Hydrogen Solubility and Atomic Structure of Graphene Supported Pd Nanoclusters

Contact Info

Product

Resources

About