Hydrogen solubility in alloys under pressure

Матысина, З. А.; Zaginaichenko, S. Yu.; Schur, D. V.

doi:10.1016/s0360-3199(96)00050-x

Cited by 38 publications

(10 citation statements)

References 4 publications

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“…), as discussed above. Therefore, metal membrane reactors or hydrogen purifiers do not use pure Pd but various different types of Pd alloyed with other metals such as silver, ,,,− copper, − nickel, − iron, ,− and platinum. , Most Pd alloy membranes studied are of binary components, with a few of multicomponents. − Compared to the pure Pd membrane, Pd−Ag composite membranes have been extensively studied because of their higher hydrogen permeabilities and more favorable phase diagrams to minimize the α → β phase transition. However, Pd−Ag alloy is quite expensive and not resistant to poisoning by sulfur-containing gas in the feed .…”

Section: Methods For Improving Chemical Stabilitymentioning

confidence: 99%

“…89,90 Most Pd alloy membranes studied are of binary components, with a few of multicomponents. [91][92][93] Compared to the pure Pd membrane, Pd-Ag composite membranes have been extensively studied because of their higher hydrogen permeabilities and more favorable phase diagrams to minimize the R f β phase transition. However, Pd-Ag alloy is quite expensive and not resistant to poisoning by sulfur-containing gas in the feed.…”

Section: Methods For Improving Chemical Stabilitymentioning

confidence: 99%

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Chemical Stability and Its Improvement of Palladium-Based Metallic Membranes

Gao

Yue

et al. 2004

Ind. Eng. Chem. Res.

162

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The chemical instability of palladium-based metal membranes is the major hurdle for their commercial applications in gas separation and membrane reactor processes. When the metal membranes are exposed to a gas stream consisting of sulfur-or carbon-containing gases or even just steam, a drop in permeability or selectivity may occur depending on the composition of the metal membrane, and the extent of the decrease depends on the temperature and partial pressure. This paper provides a comprehensive review and in-depth analysis of the poisoning effects and mechanisms of sulfur-or carbon-containing compounds and H 2 O on Pd-based metal membranes. The paper also summarizes several methods reported in the literature for improving the chemical stability of Pd-based metal membranes with an analysis on the underlining principles for chemical stability improvement. These methods include alloying Pd with other metals (such as Cu, Ni, Fe, Pt, and Ag) preferably in the body-centered-cubic crystal structure, preparing nanostructured or amorphous Pd alloy thin membranes, and modifying the surface of a Pd-based membrane by a metal. These methods have improved the chemical stability of the Pd-based membranes to some extent, and more studies in this direction are still needed in order to develop chemically stable metal membranes for various industrial applications.

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Section: Methods For Improving Chemical Stabilitymentioning

confidence: 99%

Section: Methods For Improving Chemical Stabilitymentioning

confidence: 99%

Chemical Stability and Its Improvement of Palladium-Based Metallic Membranes

Gao

Yue

et al. 2004

Ind. Eng. Chem. Res.

162

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“…(ii) On the other hand, within the same process, the carbon impurity incorporates into the lattice and probably also accumulates at the grain boundaries of TiO 2 , as suggested by cumulative results of XRD peak shift and XPS and SIMS analysis (Figures S5, S6, and S2). Incorporation of carbon atoms into the lattice of anatase TiO 2 can occur through a substitutional mechanism at the oxygen sites or by taking an interstitial site. , Thus, the carbon impurity may introduce localized states through which the electrons are trapped and thereby, decreasing the overall electron concentration. (iii) While the former mechanisms can occur at the surface and in the bulk of the samples, transient SPV measurements are surface sensitive, and a change of the surface composition or surface chemistry could also result in the observed decreased electron concentration.…”

Section: Resultsmentioning

confidence: 99%

Synthesis Control of Charge Separation at Anatase TiO₂ Thin Films Studied by Transient Surface Photovoltage Spectroscopy

Dittrich

Sydorenko

Spalatu

et al. 2022

ACS Appl. Mater. Interfaces

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For the efficient photocatalytic oxidation of organic pollutants at surfaces of semiconductors, photogenerated holes shall be separated toward the surface and transferred to reactive surface sites, whereas the transfer of photogenerated electrons toward the surface shall be minimized. In this Research Article, the identification of suitable synthesis control of charge separation combined with an in-depth understanding of charge kinetics and trapping passivation mechanisms at the related surfaces can provide tremendous opportunities for boosting the photocatalytic performance. In this work, a comprehensive transient surface photovoltage spectroscopy study of charge separation at anatase TiO 2 thin films, synthesized by ultrasonic spray pyrolysis from titanium(IV) isopropoxide (TTIP)−acetylacetone (AcacH) based precursor is reported. By varying the amount of AcacH in the precursor solution, an experimental approach of synthesis control of the charge transfer toward TiO 2 surface is provided for the first time. An increased amount of AcacH in the precursor promotes transition from preferential fast electron to preferential fast hole transfer toward anatase surface, correlating with a strong increase of the photocatalytic decomposition rate of organic pollutants. Suitable mechanisms of AcacH-induced passivation of electron traps at TiO 2 surfaces are analyzed, providing a new degree of freedom for tailoring the properties of photocatalytic systems.

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“…Зараз платиновмісні вуглецеві наноструктури (ВНС) можуть бути застосовані не тільки для конструювання паливних елементів, а й задля вирішення проблеми ефективного зберігання водню [1][2][3][4][5][6]. Можливо, що у майбутньому система «фуллеритметал-водень» стане сучасним передовим засобом накопичення водню -екологічно найчистішого джерела енергії [7][8][9][10][11][12][13][14].…”

Section: вступunclassified

Plasmochemical Synthesis of Platinum-Containing Carbon Nanostructures Suitable for CJP 3$D$-Printing

Zolotarenko¹,

Rudakova²,

Akhanova³

et al. 2022

Metallofiz. Noveishie Tekhnol.

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Hydrogen solubility in alloys under pressure

Cited by 38 publications

References 4 publications

Chemical Stability and Its Improvement of Palladium-Based Metallic Membranes

Chemical Stability and Its Improvement of Palladium-Based Metallic Membranes

Synthesis Control of Charge Separation at Anatase TiO₂ Thin Films Studied by Transient Surface Photovoltage Spectroscopy

Plasmochemical Synthesis of Platinum-Containing Carbon Nanostructures Suitable for CJP 3$D$-Printing

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Hydrogen solubility in alloys under pressure

Cited by 38 publications

References 4 publications

Chemical Stability and Its Improvement of Palladium-Based Metallic Membranes

Chemical Stability and Its Improvement of Palladium-Based Metallic Membranes

Synthesis Control of Charge Separation at Anatase TiO2 Thin Films Studied by Transient Surface Photovoltage Spectroscopy

Plasmochemical Synthesis of Platinum-Containing Carbon Nanostructures Suitable for CJP 3$D$-Printing

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Synthesis Control of Charge Separation at Anatase TiO₂ Thin Films Studied by Transient Surface Photovoltage Spectroscopy