Issue 10, 2015

In situ investigation of dissociation and migration phenomena at the Pt/electrolyte interface of an electrochemical cell

Abstract

The development of efficient energy conversion systems requires precise engineering of electrochemical interfaces and thus asks for in situ techniques to probe the structure and the composition of the dynamic electrode/electrolyte interfacial region. This work demonstrates the potential of the near ambient pressure X-ray photoelectron spectroscopy (NAPXPS) for in situ studies of processes occurring at the interface between a metal electrode and a liquid electrolyte. By using a model membrane-electrode assembly of a high temperature phosphoric acid-imbibed proton exchange membrane fuel cell, and combining NAPXPS measurements with the density functional theory, it was possible to monitor such fundamental processes as dissociation and migration of the phosphoric acid within a nanostructured Pt electrode under polarization.

Graphical abstract: In situ investigation of dissociation and migration phenomena at the Pt/electrolyte interface of an electrochemical cell

Supplementary files

Article information

Article type
Edge Article
Submitted
19 apr. 2015
Accepted
30 jún. 2015
First published
01 júl. 2015
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY-NC license

Chem. Sci., 2015,6, 5635-5642

In situ investigation of dissociation and migration phenomena at the Pt/electrolyte interface of an electrochemical cell

Y. T. Law, S. Zafeiratos, S. G. Neophytides, A. Orfanidi, D. Costa, T. Dintzer, R. Arrigo, A. Knop-Gericke, R. Schlögl and E. R. Savinova, Chem. Sci., 2015, 6, 5635 DOI: 10.1039/C5SC01421B

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