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Microstructure and electrochemical properties of nanoporous gold produced by dealloying Au-based thin film nanoglass

Published online by Cambridge University Press:  27 July 2018

Pierre Denis ,
Hans-Jörg Fecht ,
Yanpeng Xue ,
Eirini Maria Paschalidou ,
Paola Rizzi  and
Livio Battezzati
Pierre Denis*
Affiliation:
Institute of Micro and Nanomaterials, University of Ulm, Ulm 89081, Germany
Hans-Jörg Fecht
Affiliation:
Institute of Micro and Nanomaterials, University of Ulm, Ulm 89081, Germany
Yanpeng Xue*
Affiliation:
Dipartimento di Chimica e Centro Interdipartimentale NIS (Nanostructured Surfaces and Interfaces), Università di Torino, Torino 10125, Italy
Eirini Maria Paschalidou
Affiliation:
Dipartimento di Chimica e Centro Interdipartimentale NIS (Nanostructured Surfaces and Interfaces), Università di Torino, Torino 10125, Italy
Paola Rizzi
Affiliation:
Dipartimento di Chimica e Centro Interdipartimentale NIS (Nanostructured Surfaces and Interfaces), Università di Torino, Torino 10125, Italy
Livio Battezzati
Affiliation:
Dipartimento di Chimica e Centro Interdipartimentale NIS (Nanostructured Surfaces and Interfaces), Università di Torino, Torino 10125, Italy
*
a)Address all correspondence to these authors. e-mail: pierre.denis@uni-ulm.de
b)e-mail: yxue@unito.it
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Abstract

In this study, Au-based nanoglasses in the form of thin films deposited by magnetron sputtering are comparatively dealloyed. The films have either nanograined or nanocolumnar microstructure, depending on the working pressure of Ar in the sputtering chamber. Nanocolumnar thin films exhibit much higher dealloying rate reducing effectively the dealloying time with respect to nanograined and homogenous thin films. Electrocatalysis experiments indicate that the resulting nanoporous films are active for the methanol electrooxidation, with promising results in term of stability especially for the dealloyed nanocolumnar film.

Keywords

amorphousthin filmporosity
Type
Article
Information
Journal of Materials Research , Volume 33 , Issue 18 , 28 September 2018 , pp. 2661 - 2670
Copyright
Copyright © Materials Research Society 2018 

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