A New Superlattice in Co-Pt Alloys

Geisler, A. H.; Martin, Douglas L.

doi:10.1063/1.1702216

Cited by 43 publications

(12 citation statements)

References 1 publication

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“…We confirmed this by measuring the distance between L and A, d = 32 mm, and finding the angle between these two planes, g = 22.1 deg. This was consistent with the crystallographic angle between the planes (002) and (112), which was 23.7 deg. In the same manner, using the zone rule and the stereographic projection, the remaining planes on the FIM micrograph were indexed.…”

supporting

confidence: 86%

Direct determination of radiation damage profiles in the order-disorder alloys Ni/sub 4/Mo and Pt/sub 3/Co irradiated with 500 to 2500 eV Ne/sup +/ ions

Aidelberg¹

1979

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supporting

confidence: 86%

Direct determination of radiation damage profiles in the order-disorder alloys Ni/sub 4/Mo and Pt/sub 3/Co irradiated with 500 to 2500 eV Ne/sup +/ ions

Aidelberg¹

1979

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“…(e) a dis is mean of extrapolated data [45,46] from 20% Ge. (f) a ord is mean of [47] and [48], a dis is extrapolated from 18% Si. (g) Disordering by irradiation.…”

Section: Extrapolation Using High Temperature Diffraction Data and DImentioning

confidence: 99%

Lattice parameter and volume changes on disordering

Bhatia

Cahn

2005

Intermetallics

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“…High MA is typically obtained by dispersing catalyst nanoparticles on high surface area carbon. [8,9,15] For such alloys ordering has been observed, [16] resulting in an increase in ORR catalytic activity. [2b,13] Also for nanocatalysts the formation of an outermost Pt layer can be achieved with several methods, for example, annealing under inert or reducing atmosphere or via (electro-)chemical leaching.…”

Section: Introductionmentioning

confidence: 99%

The Space Confinement Approach Using Hollow Graphitic Spheres to Unveil Activity and Stability of Pt‐Co Nanocatalysts for PEMFC

Pizzutilo

Knossalla

Geiger

et al. 2017

Advanced Energy Materials

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The performance of polymer electrolyte fuel cells is strongly correlated to the electrocatalytic activity and stability. In particular, the latter is the result of an interplay between different degradation mechanisms. The essential high stability, demanded for real applications, requires the synthesis of advanced electrocatalysts that withstand the harsh operation conditions. In the first part of this study, the synthesis of oxygen reduction electrocatalysts consisting of Pt-Co (i.e., Pt5Co, Pt3Co, and PtCo) alloyed nanoparticles encapsulated in the mesoporous shell of hollow graphitic spheres (HGS) is reported. The mass activities of the activated catalysts depend on the initial alloy composition and an activity increase on the order of two to threefold, compared to pure Pt@HGS, is achieved. The key point of the second part is the investigation of the degradation of PtCo@HGS (showing the highest activity). Thanks to pore confinement, the impact of dissolution/dealloying and carbon corrosion can be studied without the interplay of other degradation mechanisms that would induce a substantial change in the particle size distribution. Therefore, impact of the upper potential limit and the scan rates on the dealloying and electrochemical surface area evolution can be examined in detail

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A New Superlattice in Co-Pt Alloys

Cited by 43 publications

References 1 publication

Direct determination of radiation damage profiles in the order-disorder alloys Ni/sub 4/Mo and Pt/sub 3/Co irradiated with 500 to 2500 eV Ne/sup +/ ions

Direct determination of radiation damage profiles in the order-disorder alloys Ni/sub 4/Mo and Pt/sub 3/Co irradiated with 500 to 2500 eV Ne/sup +/ ions

Lattice parameter and volume changes on disordering

The Space Confinement Approach Using Hollow Graphitic Spheres to Unveil Activity and Stability of Pt‐Co Nanocatalysts for PEMFC

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