Pd–Ag hydrogen content and electrical resistivity: Temperature and pressure effect

Pozio, Alfonso; Jovanović, Zoran; Presti, Roberto Lo; Francesco, M. De; Tosti, Silvano

doi:10.1016/j.ijhydene.2012.01.108

Cited by 13 publications

(14 citation statements)

References 26 publications

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“…The same experimental setup as that described in a previous work was used [11]. In brief, a Pd–Ag 21 wt.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…The exact phase limits should depend on the silver content, temperature, and pressure, and their increase reduces the two-phase region [3,10]. Nevertheless, the S-shape behavior of Pd–Ag resistivity remained unclear, as well as the minimum at a higher H/M ratio with its subsequent increase [11].…”

Section: Introductionmentioning

confidence: 99%

“…The low-temperature inversion (80–150 °C) in the electrical resistivity curve of Pd–Ag was observed and explained with consideration of the two different hydride forms present in its lattice [11,12,13]. A low-temperature hydride form (tetrahedral positions occupied by H) is expected to have a higher resistivity than a high-temperature one (octahedral), so a minimum of the resistivity for hydrogenated Pd–Ag appears in this temperature range [12,13].…”

Section: Introductionmentioning

confidence: 99%

“…We can suppose that the existence of different kinds of hydride forms is more pronounced in the Pd–Ag lattice where the difference between the hydrogen position in the lattice is more evident, as shown by resistivity data [11]. In this work, TPD and resistivity measurements were coupled in order to understand the hydrogen absorption process, its role in electrical resistivity, and its correlation to the existence of different hydride forms in hydrogenated Pd–Ag alloys in the temperature range 25–200 °C.…”

Section: Introductionmentioning

confidence: 99%

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Hydrogen Absorption in Pd–Ag Systems: A TPD and Electrical Resistivity Study

2019

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Hydrogen retention in Pd–Ag (silver 21 wt. %) thin foil has been tested by means of temperature-programmed desorption (TPD) in the temperature range 25–200 °C and compared to the resistivity measurements for the purpose of explaining the characteristic S-shaped resistivity curve and its minimum observed in the same temperature range. The TPD results indicated that the highest uptake of hydrogen was between 65 °C and 105 °C, with a maximum at ~85 °C. Furthermore, in all examined cases, the hydrogen desorption peak was between 140 °C and 180 °C. The resistivity measurements in argon, hydrogen, and vacuum allowed us to examine the influence of hydrogen on the resistivity of a Pd–Ag alloy. The results showed evidence of two kinds of hydrides: (1) a weak absorption at low temperature (T < 70 °C) with the hydrogen present mainly in tetrahedral sites, and (2) a strong absorption up to 150 °C with the hydrogen present mainly in octahedral sites. The behaviour of the electrical resistivity and the minimum between 90 °C and 110 °C can be explained by the two kinds of hydrogen uploaded into the metal lattice.

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“…The same experimental setup as that described in a previous work was used [11]. In brief, a Pd–Ag 21 wt.…”

Section: Experimental Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Hydrogen Absorption in Pd–Ag Systems: A TPD and Electrical Resistivity Study

2019

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“…Generally, the hydrogen uploading into metals involves a variation of their electrical resistivity: previous works have been performed with the Pd-Ag alloy [11][12].…”

Section: Introductionmentioning

confidence: 99%

Hydrogen solubility and electrical resistivity measurements of hydrogenated Pb-Li

Tosti

Pozio

Santucci

et al. 2013

2013 IEEE 25th Symposium on Fusion Engineering (SOFE)

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The study of the interaction of hydrogen isotopes with the Pb-Li eutectic alloy is of interest for the design of the fusion reactor breeding blankets. Particularly, the solubility of the hydrogen isotopes in the Pb-Li eutectic alloy significantly affects the tritium inventory and permeation in the blankets. Furthermore, the electrical resistivity of hydrogenated Pb-Li is of concern for the assessment of MHD regimes. In analogy with other hydrogen/metal systems, a modification of the electric properties is expected by varying the hydrogen content. So far, the literature reports large discrepancies for the measurements in Pb-Li of both the hydrogen isotopes solubility (2-3 orders of magnitude) and the electrical resistivity (more than 1 order of magnitude).This work reports the results of hydrogen solubility in Pb-Li in the temperature and pressure ranges 250-450 °C and 20-150 kPa, respectively. Preliminary electrical resistivity measurements have been carried out at 360 °C in Ar and in hydrogen (250 kPa).

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Hydrogen Sensing with Palladium‐Based Materials: Mechanisms, Challenges, and Opportunities

Toksha,

Gupta,

Rahaman

2024

Chemistry An Asian Journal

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Palladium morphologies are prominently used in Hydrogen gas sensing applications owing to their unique characteristics and properties. In this review article, Palladium nanoparticles, thin films, and alloys were designated as the scope of Palladium morphologies. The aim of this review article is to explore Hydrogen sensing using Palladium, focusing on the recent advancements in the field. The principles underlying Hydrogen sensing mechanisms with Palladium are discussed initially, highlighting the unique properties of Palladium that make it a promising material for this purpose. Special attention is given to the surface interactions and structural modifications that influence the sensitivity and selectivity of Palladium‐based sensors. The study also addresses key challenges and recent innovations in the field which contribute to the enhancement of Palladium‐based Hydrogen sensing capabilities. The current state of research is critically examined to identify gaps in knowledge and future research directions are highlighted. The prospects and challenges associated with the use of Palladium for Hydrogen sensing, emphasizing its pivotal role in advancing sensor technologies for Hydrogen detection are also discussed.

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Pd–Ag hydrogen content and electrical resistivity: Temperature and pressure effect

Cited by 13 publications

References 26 publications

Hydrogen Absorption in Pd–Ag Systems: A TPD and Electrical Resistivity Study

Hydrogen Absorption in Pd–Ag Systems: A TPD and Electrical Resistivity Study

Hydrogen solubility and electrical resistivity measurements of hydrogenated Pb-Li

Hydrogen Sensing with Palladium‐Based Materials: Mechanisms, Challenges, and Opportunities

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