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

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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.

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ACKNOWLEDGMENTS

This work was supported by the funding scheme of the European Commission, Marie Curie Actions-Initial Training Networks (ITN) in the frame of the project VitriMetTech-Vitrified Metals Technologies and Applications in Devices and Chemistry, 607080 FP7-PEOPLE-2013-ITN. We would like to thank PX Services, La Chaux-de-Fonds (CH), for providing the material and the equipment necessary for the casting of the Au-based target.

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Authors and Affiliations

  1. Institute of Micro and Nanomaterials, University of Ulm, Ulm, 89081, Germany

    Pierre Denis & Hans-Jörg Fecht

  2. Dipartimento di Chimica e Centro Interdipartimentale NIS (Nanostructured Surfaces and Interfaces), Università di Torino, Torino, 10125, Italy

    Yanpeng Xue, Eirini Maria Paschalidou, Paola Rizzi & Livio Battezzati

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  1. Pierre Denis
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  2. Hans-Jörg Fecht
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  3. Yanpeng Xue
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  4. Eirini Maria Paschalidou
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  5. Paola Rizzi
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Correspondence to Pierre Denis or Yanpeng Xue.

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Supporting information: Microstructure and electrochemical properties of nanoporous Gold produced by dealloying Au-based thin film nano-glass (approximately 1.84 MB)

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Denis, P., Fecht, HJ., Xue, Y. et al. Microstructure and electrochemical properties of nanoporous gold produced by dealloying Au-based thin film nanoglass. Journal of Materials Research 33, 2661–2670 (2018). https://doi.org/10.1557/jmr.2018.176

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