Hydrogen solubility in PdCuAu alloy thin films prepared by electrodeposition

Guerreiro, Bruno Honrado; Martin, M.; Roué, Lionel; Guay, Daniel

doi:10.1016/j.ijhydene.2013.11.117

Cited by 12 publications

(20 citation statements)

References 39 publications

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“…The shape of the curves for the alloys is not markedly different from that measured on pure Pd thin film (not shown), except for the maximum H/M value, ((H/M) max ). For example, pure palladium has a (H/M) max value of 68%, which is in good agreement with the already published results [29,36,41], while that of samples shown in Fig. 6 varies between 4 and 12%.…”

Section: Hydrogen Solubility Measurementssupporting

confidence: 92%

“…Accordingly, the fact that all films studied here exhibit the same morphology is not surprising. A similar morphology was observed for PdCuAu alloy thin film with low Au content ([Au] < 5 at.%) prepared by the same pulsed electrodeposition method [29], indicating that the morphology of the film is dictated by the Pd and Cu contents at low Ag or Au content.…”

Section: Resultssupporting

confidence: 72%

“…3.7 to 0.7% when crystallographic structure of the alloy changes from fcc to bcc. A similar observation was made for PdCu binary alloys and PdCuAu ternary alloys when the structure is changed from fcc to bcc [29,36]. Unfortunately, a detailed investigation of the variation of the maximum hydrogen solubility with the alloy composition in the region where the bcc structure is stable cannot be performed.…”

Section: Hydrogen Solubility Measurementssupporting

confidence: 52%

“…Thus, there is a significant difference between lattice parameter determined from the (111) and the (200) diffraction peaks that needs further discussion. These deviations between the experimental and the expected lattice parameters for the (200) peaks was already observed for the PdCu alloys [27,29]. The significant difference between (a 200 À a exp ) and (a 111 À a exp ) denotes an anisotropic deformation of the crystalline structure.…”

Section: Resultsmentioning

confidence: 62%

See 3 more Smart Citations

Hydrogen solubility in PdCuAg ternary alloy films prepared by electrodeposition

Tosques¹,

Martin²,

Roué³

et al. 2014

International Journal of Hydrogen Energy

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Section: Hydrogen Solubility Measurementssupporting

confidence: 92%

Section: Resultssupporting

confidence: 72%

Section: Hydrogen Solubility Measurementssupporting

confidence: 52%

Section: Resultsmentioning

confidence: 62%

See 2 more Smart Citations

Hydrogen solubility in PdCuAg ternary alloy films prepared by electrodeposition

Tosques¹,

Martin²,

Roué³

et al. 2014

International Journal of Hydrogen Energy

Self Cite

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“…Though the sulfides could be desorbed using zinc oxide powder or high-temperature sulphur adsorbent [12,13], great damage was caused to the Pd membrane used in highly-pure hydrogen preparation [14]. Based on the development trend of the Pd membrane with sulfuration resistance, high hydrogen permeation and low cost [15][16][17][18][19][20][21][22], the study of the influence mechanisms of sulfides on the Pd membrane surface was necessary. Some valuable was necessary.…”

Section: Introductionmentioning

confidence: 99%

Influence of Hydrogen Sulfide and Redox Reactions on the Surface Properties and Hydrogen Permeability of Pd Membranes

et al. 2018

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Although hydrogen sulfide (H 2 S) was always a negative factor leading to the reduction of hydrogen permeability of palladium (Pd) membranes, its proper application could result in a positive effect. In this study, pure Pd membranes were firstly reacted with H 2 S at 23-450 • C, and then treated by redox reactions. Afterwards, the hydrogen permeability was tested under different reaction conditions using a hydrogen penetrant testing device. Moreover, both products and morphology changes occurred on the Pd membrane surface were analyzed using XRD, XPS and SEM. The results showed that H 2 S was dissociated to produce sulfides at 23 • C. With a rise of temperature, a regular change took place in the reaction products, morphology of the Pd membrane surface and hydrogen permeability. Adsorbed impurities such as sulfides and free carbon on the Pd membrane surface were removed by the redox treatment. The hydrogen permeability was improved by about 80% for the Pd membrane material subjected to the treatment method stated the above against the untreated one.

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Surface composition of PdCuAu ternary alloys: a combined LEIS and XPS study

Tarditi

Imhoff

Miller

et al. 2015

Surface & Interface Analysis

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PdCuAu ternary alloy samples with different composition were synthesized on top of ZrO 2 -modified porous stainless steel disks by the sequential electroless deposition technique. The structure, morphology and bulk composition of the samples were characterized by X-ray diffraction (XRD), scanning electron microscopy and energy dispersive X-ray spectroscopy (EDX). Complete alloy formation with a pure fcc phase for the Pd 71 Cu 26 Au 3 , Pd 70 Cu 25 Au 5 and Pd 67 Cu 24 Au 9 samples and a bcc structure for the Pd 62 Cu 36 Au 2 and Pd 60 Cu 37 Au 3 samples were obtained upon annealing at 500°C for 120 h as revealed by XRD. A combination of low-energy ion scattering (LEIS) and X-ray photoelectron spectroscopy (XPS) was used to investigate the surface properties of the PdCuAu alloys. XPS results confirmed alloy formation under the annealing conditions. XPS analysis also revealed that the near-surface regions of the alloys became enriched in Pd with respect to the bulk composition determined by EDX. In contrast, LEIS and angle-resolved XPS analyses showed that the top-most surface layers in all samples were copper-rich compared with the bulk composition. This high Cu surface concentration could impart resistance to bulk sulfide formation to the PdCuAu alloy membranes.

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Hydrogen solubility in PdCuAu alloy thin films prepared by electrodeposition

Cited by 12 publications

References 39 publications

Hydrogen solubility in PdCuAg ternary alloy films prepared by electrodeposition

Hydrogen solubility in PdCuAg ternary alloy films prepared by electrodeposition

Influence of Hydrogen Sulfide and Redox Reactions on the Surface Properties and Hydrogen Permeability of Pd Membranes

Surface composition of PdCuAu ternary alloys: a combined LEIS and XPS study

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