Journal ArticleDOI
Characteristic features of alloy polarization curves
TLDR
In this article, four distinct polarization regions are identified and characterized in terms of the tendency for selective dissolution, surface enrichment of the more noble component and the stability of a planar surface.About:
This article is published in Corrosion Science.The article was published on 1983-01-01. It has received 243 citations till now. The article focuses on the topics: Alloy & Polarization (electrochemistry).read more
Citations
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Evolution of nanoporosity in dealloying
Jonah Erlebacher,Jonah Erlebacher,Michael J. Aziz,Alain Karma,Nikolay Dimitrov,Karl Sieradzki +5 more
TL;DR: It is demonstrated that nanoporosity in metals is due to an intrinsic dynamical pattern formation process, and that chemically tailored nanoporous gold made by dealloying Ag-Au should be suitable for sensor applications, particularly in a biomaterials context.
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Nanoporous Gold Leaf: “Ancient Technology”/Advanced Material
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An Atomistic Description of Dealloying Porosity Evolution, the Critical Potential, and Rate-Limiting Behavior
TL;DR: In this article, the microscopic details of porosity formation during dealloying were illuminated by a kinetic Monte Carlo model incorporating site coordination-dependent surface diffusion of all alloy components, and site coordinationdependent dissolution of the lessnoble atoms.
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Dealloyed Pt−Cu Core−Shell Nanoparticle Electrocatalysts for Use in PEM Fuel Cell Cathodes
Abstract: We report the synthesis, characterization, and single fuel cell testing of a novel class of nanostructured Pt−Cu alloy particle materials for use as oxygen reduction electrocatalyst in polymer electrolyte membrane fuel cells The active phase of the Pt alloy nanoparticle catalysts is prepared by electrochemical dissolution (voltammetric dealloying) of Cu surface atoms from Cu-rich Pt−Cu alloy precursors Bulk and surface structural and compositional characterization suggests that the dealloyed active catalyst phase consists of a core−shell structure in which a multilayer Pt rich shell is surrounding a Pt-poor alloy particle core The electrocatalytic Pt mass activity of the dealloyed core−shell particles for the oxygen reduction reaction (ORR) exceeds that of state-of-the art Pt electrocatalyst by more than a factor of 4 and thus meets performance targets for fuel cell cathodes [Gasteiger, H A; Kocha, S S; Sompalli, B; Wagner, F T Appl Catal B: Environ 2005, 56, 9−35]1 It is hypothesized that
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Ultrafine nanoporous gold by low-temperature dealloying and kinetics of nanopore formation
Lihua Qian,Mingwei Chen +1 more
TL;DR: In this paper, a low-temperature dealloying technique was developed to tailor the characteristic length scale of nanoporous gold for advanced functional applications by systematically investigating the kinetics of nanopore formation during free corrosion.
References
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Journal ArticleDOI
Electrolytic Dissolution of Binary Alloys Containing a Noble Metal
H. W. Pickering,C. Wagner +1 more
TL;DR: In this paper, the ionization and redeposition of binary alloys, coupling of the anodic reactions in accordance with the concepts of irreversible thermodynamics, and volume diffusion in the presence of given supersaturations of single and double vacancies are analyzed theoretically.
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A micromorphological study of the dissolution of silver-gold alloys in nitric acid
A. J. Forty,P. Durkin +1 more
TL;DR: In this paper, the surface structure and composition of thin films of silver-gold alloys are used to deduce the processes involved in the dissolution of these alloys in nitric acid solutions.
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Electron Metallography of Chemical Attack Upon Some Alloys Susceptible to Stress Corrosion Cracking
H. W. Pickering,P. R. Swann +1 more
TL;DR: In this paper, the microstructures of deformed copper-gold, copper-aluminum and copper-zinc alloys were examined by transmission electron microscopy and it was shown that exposure to “cracking” solutions resulted in a localized pitting or tubular form of attack, whereas the solutions which did not produce cracking caused a uniform surface roughening.
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Zum Gedächtnis der Entdeckung des Isomorphismus vor 100 Jahren. Die chemischen und galvanischen Eigenschaften von Mischkristallreihen und ihre Atomverteilung
TL;DR: In this paper, the authors present a bestimmung der Einwirkungsgrenzen von schwefelhaltigen Agentien and schwachen Oxydationsmitteln auf die Cu-Au-Mischkristalle.