In-Situ XAFS Characterization of PtPd Nanoparticles Synthesized by Galvanic Replacement

Full-Text HTML XML Download Download as PDF (Size:3573KB) PP. 75-91
DOI: 10.4236/anp.2017.62007    2,233 Downloads   2,906 Views Citations
Author(s)
Simon Tymen1, Andreas C. Scheinost2, Christian Friebe1,3, Ulrich S. Schubert1,3,4

Affiliation(s)

1Institute of Organic and Macromolecular Chemistry (IOMC), Friedrich-Schiller University, Jena, Germany.
2The Rossendorf Beamline at the European Synchroton European Synchrotron Radiation Facility (ESRF), Grenoble, France and Molecular Structure Division, Institute of Radiochemistry Forschungszentrum Dresden-Rossendorf (FZD), Dresden, Germany.
3Center for Energy and Environmental Chemistry Jena (CEEC Jena), Friedrich-Schiller University, Jena, Germany.
4Jena Center for Soft Matter (JCSM), Friedrich-Schiller University, Jena, Germany.

ABSTRACT

Platinum-palladium nanoparticles are synthesized and characterized with regard to their application in fuel cells due to their high (electro) catalytic activity. Different preparation times are applied leading to different structures, from Pd cubic to core-shell PtPd concave, and different chemical compositions. The resulting particles are studied via Transmission Electron Microscopy (TEM) and in-situ X-ray absorption fine structure (XAFS) measurements. The latter allows the investigation of the oxygen reduction reaction following the variations with varying applied potentials by analysis using the Iterative Transformation Factor Analysis (ITFA) and the creation of a two-component system that consists of metallic Pt-Pd and the related oxide. With the used model, the different concentrations of the oxide are linked to the consecutive chemical steps of the oxygen reduction reaction. Finally, the catalytic activity of the particles is determined via linear scanning voltammetry and reveals a dependence on the shape and the composition of the particles.

KEYWORDS

Platinum, Palladium, Nanoparticles, Oxygen Reduction Reaction, In-Situ XAFS, ITFA

Cite this paper

Tymen, S. , Scheinost, A. , Friebe, C. and Schubert, U. (2017) In-Situ XAFS Characterization of PtPd Nanoparticles Synthesized by Galvanic Replacement. Advances in Nanoparticles, 6, 75-91. doi: 10.4236/anp.2017.62007.
ANP Subscription
E-Mail Alert
ANP Most popular papers
Publication Ethics & OA Statement
ANP News
Frequently Asked Questions
Recommend to Peers
Recommend to Library
Contact Us

Copyright © 2020 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.