Jump to main content
Jump to site search

Issue 16, 2017
Previous Article Next Article

Local structure and composition of PtRh nanoparticles produced through cathodic corrosion

Author affiliations

Abstract

Alloy nanoparticles fulfill an important role in catalysis. As such, producing them in a simple and clean way is much desired. A promising alloy nanoparticle production method is cathodic corrosion, which generates particles by applying an AC voltage to an alloy electrode. However, this harsh AC potential program might affect the final elemental distribution of the nanoparticles. In this work, we address this issue by characterizing the time that is required to create 1 μmol of Rh, Pt12Rh88, Pt55Rh45 and Pt nanoparticles under various applied potentials. The corrosion time measurements are complemented by structural characterization through transmission electron microscopy, X-ray diffraction and X-ray absorption spectroscopy. The corrosion times indicate that platinum and rhodium corrode at different rates and that the cathodic corrosion rates of the alloys are dominated by platinum. In addition, the structure-sensitive techniques reveal that the elemental distributions of the created alloy nanoparticles indeed exhibit small degrees of elemental segregation. These results indicate that the atomic alloy structure is not always preserved during cathodic corrosion.

Graphical abstract: Local structure and composition of PtRh nanoparticles produced through cathodic corrosion

Back to tab navigation

Supplementary files

Article information


Submitted
16 Feb 2017
Accepted
23 Mar 2017
First published
24 Mar 2017

This article is Open Access

Phys. Chem. Chem. Phys., 2017,19, 10301-10308
Article type
Paper

Local structure and composition of PtRh nanoparticles produced through cathodic corrosion

T. J. P. Hersbach, R. Kortlever, M. Lehtimäki, P. Krtil and M. T. M. Koper, Phys. Chem. Chem. Phys., 2017, 19, 10301
DOI: 10.1039/C7CP01059A

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material.

Reproduced material should be attributed as follows:

  • For reproduction of material from NJC:
    [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the Centre National de la Recherche Scientifique (CNRS) and the RSC.
  • For reproduction of material from PCCP:
    [Original citation] - Published by the PCCP Owner Societies.
  • For reproduction of material from PPS:
    [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC.
  • For reproduction of material from all other RSC journals:
    [Original citation] - Published by The Royal Society of Chemistry.

Information about reproducing material from RSC articles with different licences is available on our Permission Requests page.


Social activity

Search articles by author

Spotlight

Advertisements