Reversibility of Pt-skin and Pt-skeleton nanostructures in acidic media. Durst; e, J.; Lopez-Haro; b, M.; Dubau, L.; Chatenet; d, M.; Soldo-Olivier, Y.; Guétaz, L.; Bayle-Guillemaud, P.; and Maillard, F. Journal of Physical Chemistry Letters, 5(3):434-439, 2014. cited By 12
Paper doi abstract bibtex Following a well-defined series of acid and heat treatments on a benchmark Pt3Co/C sample, three different nanostructures of interest for the electrocatalysis of the oxygen reduction reaction were tailored. These nanostructures could be sorted into the "Pt-skin" structure, made of one pure Pt overlayer, and the "Pt-skeleton" structure, made of 2-3 Pt overlayers surrounding the Pt-Co alloy core. Using a unique combination of high-resolution aberration-corrected STEM-EELS, XRD, EXAFS, and XANES measurements, we provide atomically resolved pictures of these different nanostructures, including measurement of the Pt-shell thickness forming in acidic media and the resulting changes of the bulk and core chemical composition. It is shown that the Pt-skin is reverted toward the Pt-skeleton upon contact with acid electrolyte. This change in structure causes strong variations of the chemical composition. © 2014 American Chemical Society.
@article{ Durst2014434,
author = {Durst, J.a e and Lopez-Haro, M.a b and Dubau, L.a and Chatenet, M.a d and Soldo-Olivier, Y.a and Guétaz, L.c and Bayle-Guillemaud, P.b and Maillard, F.a },
title = {Reversibility of Pt-skin and Pt-skeleton nanostructures in acidic media},
journal = {Journal of Physical Chemistry Letters},
year = {2014},
volume = {5},
number = {3},
pages = {434-439},
doi = {10.1021/jz4025707},
note = {cited By 12},
url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84893859778&partnerID=40&md5=f195f1bfee0c291c9b07c6426fcc41c9},
affiliation = {Laboratoire d'Electrochimie et de Physico-chimie des Matériaux et des Interfaces, UMR 5279 CNRS, Université Joseph Fourier, 1130 rue de la piscine, BP75, 38402 Saint-Martin-d'Hères cedex, France; CEA, INAC, LEMMA, 38054 Grenoble cedex 9, France; CEA, LITEN, Laboratoire des Composants PEM, 17 rue des Martyrs, 38054 Grenoble, France; French University Institute (IUF), France; Department of Technical Electrochemistry, Technische Universität München, Lichtenbergstr. 4, D-85748 Garching, Germany},
abstract = {Following a well-defined series of acid and heat treatments on a benchmark Pt3Co/C sample, three different nanostructures of interest for the electrocatalysis of the oxygen reduction reaction were tailored. These nanostructures could be sorted into the "Pt-skin" structure, made of one pure Pt overlayer, and the "Pt-skeleton" structure, made of 2-3 Pt overlayers surrounding the Pt-Co alloy core. Using a unique combination of high-resolution aberration-corrected STEM-EELS, XRD, EXAFS, and XANES measurements, we provide atomically resolved pictures of these different nanostructures, including measurement of the Pt-shell thickness forming in acidic media and the resulting changes of the bulk and core chemical composition. It is shown that the Pt-skin is reverted toward the Pt-skeleton upon contact with acid electrolyte. This change in structure causes strong variations of the chemical composition. © 2014 American Chemical Society.},
author_keywords = {EELS; proton-exchange membrane fuel cell (PEMFC); Pt-Co/C nanoparticles; Pt-skeleton; Pt-skin; STEM-HAADF; XAS},
document_type = {Article},
source = {Scopus}
}