Local Magnetic Moments of Ruthenium in Palladium/Ruthenium/Hydrogen Alloys

Frölich, K.; Severin, H. G.; Hempelmann, Rolf; Wicke, E.

doi:10.1524/zpch.1980.119.1.033

Cited by 26 publications

(9 citation statements)

References 21 publications

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“…Since 1966, the Pd–Ru bulk alloy system has been widely studied in areas including hydrogen storage/permeability,[22,25,26] selective hydrogenation[27–30] and magnetic properties. [31] These studies pointed out the alloy effect by substituting a low amount of Ru with Pd caused the modification of the Pd d-band electronic structure and consequently changed the Pd properties. However, in this stage, most of the Pd–Ru bulk alloy were obtained by techniques such as conventional cold rolling, physical/chemical vapor deposition, arc melting, electroplating or electroformation and electroless plating,[27] and the Ru content of the alloys was generally limited below 10 wt%.…”

Section: Introductionmentioning

confidence: 99%

Recent progress in the structure control of Pd–Ru bimetallic nanomaterials

Kusada

Kitagawa

2016

Science and Technology of Advanced Materials

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Pd and Ru are two key elements of the platinum-group metals that are invaluable to areas such as catalysis and energy storage/transfer. To maximize the potential of the Pd and Ru elements, significant effort has been devoted to synthesizing Pd–Ru bimetallic materials. However, most of the reports dealing with this subject describe phase-separated structures such as near-surface alloys and physical mixtures of monometallic nanoparticles (NPs). Pd–Ru alloys with homogenous structure and arbitrary metallic ratio are highly desired for basic scientific research and commercial material design. In the past several years, with the development of nanoscience, Pd–Ru bimetallic alloys with different architectures including heterostructure, core-shell structure and solid-solution alloy were successfully synthesized. In particular, we have now reached the stage of being able to obtain Pd–Ru solid-solution alloy NPs over the whole composition range. These Pd–Ru bimetallic alloys are better catalysts than their parent metal NPs in many catalytic reactions, because the electronic structures of Pd and Ru are modified by alloying. In this review, we describe the recent development in the structure control of Pd–Ru bimetallic nanomaterials. Aiming for a better understanding of the synthesis strategies, some fundamental details including fabrication methods and formation mechanisms are discussed. We stress that the modification of electronic structure, originating from different nanoscale geometry and chemical composition, profoundly affects material properties. Finally, we discuss open issues in this field.

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Section: Introductionmentioning

confidence: 99%

Recent progress in the structure control of Pd–Ru bimetallic nanomaterials

Kusada

Kitagawa

2016

Science and Technology of Advanced Materials

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“…These observations have been explained [11] in terms of the virtual bound state (VBS) model [12]. It has been assumed that the VBS, localized on impurity transitionmetal atoms, were formed in vicinity of the Fermi level thus affecting much the TEP of the host.…”

Section: Introductionmentioning

confidence: 99%

Thermoelectric Power and Electrical Resistance of Hydrogenated Nickel Alloyed with Transition Metals (V, Fe, Co) between 80 and 300 K

Szafrański

1999

phys. stat. sol. (a)

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“…1% at. Ru), as compared with the capacity of pure Pd [16,38,39]. Figure 7 shows the influence of temperature and alloy bulk composition on the extent of the absorption/desorption hysteresis, i.e., the difference between E α-β and E β-α [1].…”

Section: Alloy Bulk Compositionmentioning

confidence: 99%

Effect of Temperature, Electrode Potential, and Bulk Composition on Hydrogen Electrosorption into Palladium-Ruthenium Alloys—Comparative Study with Other Binary Systems

2018

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The influence of temperature between 283 K and 328 K on hydrogen electrosorption into Pd-Ru alloys in the bulk composition range 87-100% at. Pd was studied voltammetrically and chronoamperometrically in 0.5 M H 2 SO 4 solution. The maximum alloy ability to absorb hydrogen decreases with increasing temperature. The extent of hydrogen absorption/desorption hysteresis is slightly reduced with increasing temperature and markedly reduced with increasing Ru bulk content. Both increasing temperature and Ru bulk content results not only in a decrease in the thermodynamic stability of the hydride phase but also in an improvement in the kinetics of hydrogen electrosorption. Pd-Ru alloys containing more than ca. 97% at. Pd absorb more hydrogen than pure Pd, while further Ru additive results in a significant deterioration of the alloy ability to absorb hydrogen. The data on the influence of temperature and alloy bulk composition on the processes of hydrogen electrosorption in Pd binary alloys with Ru, Rh, Pt, and Au have been compared.

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Local Magnetic Moments of Ruthenium in Palladium/Ruthenium/Hydrogen Alloys

Cited by 26 publications

References 21 publications

Recent progress in the structure control of Pd–Ru bimetallic nanomaterials

Recent progress in the structure control of Pd–Ru bimetallic nanomaterials

Thermoelectric Power and Electrical Resistance of Hydrogenated Nickel Alloyed with Transition Metals (V, Fe, Co) between 80 and 300 K

Effect of Temperature, Electrode Potential, and Bulk Composition on Hydrogen Electrosorption into Palladium-Ruthenium Alloys—Comparative Study with Other Binary Systems

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