Copper-based alloys, crystallographic and crystallochemical parameters of alloys in binary systems Cu-Me (Me=Co, Rh, Ir, Cu, Ag, Au, Ni, Pd, Pt)

Porobova, S A; Markova, T. N.; Klopotov, Vladimir D.; Клопотов, А. А.; Loskutov, Oleg; Vlasov, V. A.

doi:10.1063/1.4937827

Cited by 5 publications

(4 citation statements)

References 4 publications

(8 reference statements)

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“…36 The segregation between Cu and Rh is more surprising as Cu and Rh are considered miscible. 37,38 We assume that upon the deposition of Rh on the surface of the Cu core, the bimetallic particles were not kept at sufficiently elevated temperatures long enough to drive the mixing of Cu and Rh atoms via solidstate diffusion. In the synthesized Cu-Rh sample, we also collected small intermetallic CuRh 2 particles.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Characterization of Core-Shell Cu-Ru, Cu-Rh, and Cu-Ir Nanoparticles

et al. 2022

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Optimizing the use of expensive precious metals is critical to developing sustainable and low-cost processes for heterogeneous catalysis or electrochemistry. Here, we report a synthesis method that yields core-shell Cu-Ru, Cu-Rh, and Cu-Ir nanoparticles with the platinum-group metals segregated on the surface. The synthesis of Cu-Ru, Cu-Rh, and Cu-Ir particles allows maximization of the surface area of these metals and improves catalytic performance. Furthermore, the Cu core can be selectively etched to obtain nanoshells of the platinum-group metal components, leading to a further increase in the active surface area. Characterization of the samples was performed with X-ray absorption spectroscopy, X-ray powder diffraction, and ex situ and in situ transmission electron microscopy. CO oxidation was used as a reference reaction: the three core-shell particles and derivatives exhibited promising catalyst performance and stability after redox cycling. These results suggest that this synthesis approach may optimize the use of platinum-group metals in catalytic applications.

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Section: Resultsmentioning

confidence: 99%

Synthesis and Characterization of Core-Shell Cu-Ru, Cu-Rh, and Cu-Ir Nanoparticles

et al. 2022

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“…For the Noble metal systems studied here, where all elements crystallize in an fcc structure at low temperature, and where all elements aside from Ni are non-magnetic, we expect Vegard's law to work reasonably well. Deviations to Vegard's law for many binary solid solution alloys within this family of alloys appear small in a range of experiments and first-principles studies [10,11,12,13,14,15].…”

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confidence: 90%

Predicting yield strengths of noble metal high entropy alloys

Varvenne

Curtin

2018

Scripta Materialia

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Recent data on the Noble metal (Pd-Pt-Rh-Ir-Au-Ag-Cu-Ni) high entropy alloys (HEAs) shows some of these materials to have impressive mechanical properties. Here, a mechanistic theory for the temperature-, composition-, and strain-rate-dependence of the initial yield strength of fcc HEAs is applied to this alloy class, with inputs obtained through "rule-of-mixtures" models for both alloy lattice and elastic constants. Predictions for PdPtRhIrCuNi are in good agreement with available experiment and the model provides useful insights into this system. The model is then used to explore other alloy compositions within this broad class to guide design of new stronger Noble metal HEAs.

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“…Rh: Rhodium atoms may form solid solution in Cu up to 20at.% Rh in low temperatures and the element possesses unlimited solubility in Cu at high temperatures [88].GSFE is almost unchanged in Cu-Rh alloy in comparison to Cu. The TWA (USFE/UTE) is slightly increased.…”

Section: Stacking Fault Energies In Copper In 4d Transition Metal Alloysmentioning

confidence: 99%

Generalised stacking fault energies of copper alloys - density functional theory calculations

Muzyk

Kurzydłowski

2019

J min metall B Metall

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Generalised stacking fault energies of copper alloys have been calculated using density functional theory. Stacking fault energy of copper alloys is correlated with the d-electrons number of transition metal alloying element. The tendency to twiningis also modified by the presence of alloying element in the deformation plane. The results suggest that Cu-transition metal alloys with such elements as Cr, Mo, W, Mn, Re are expected to exhibit great work hardening rate due to the tendency to emission of the partial dislocations.

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Copper-based alloys, crystallographic and crystallochemical parameters of alloys in binary systems Cu-Me (Me=Co, Rh, Ir, Cu, Ag, Au, Ni, Pd, Pt)

Cited by 5 publications

References 4 publications

Synthesis and Characterization of Core-Shell Cu-Ru, Cu-Rh, and Cu-Ir Nanoparticles

Synthesis and Characterization of Core-Shell Cu-Ru, Cu-Rh, and Cu-Ir Nanoparticles

Predicting yield strengths of noble metal high entropy alloys

Generalised stacking fault energies of copper alloys - density functional theory calculations

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