Reversibility of Pt-skin and Pt-skeleton nanostructures in acidic media. Durst, J. e; Lopez-Haro, M. b; Dubau, L.; Chatenet, M. d; Soldo-Olivier, Y.; Guétaz, L.; Bayle-Guillemaud, P.; and Maillard, F. Journal of Physical Chemistry Letters, 5(3):434-439, 2014. cited By 15
Reversibility of Pt-skin and Pt-skeleton nanostructures in acidic media [link]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 15},
url={https://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},
}
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