IN-SITU STRUCTURAL CHARACTERIZATION OF A PLATINUM ELECTROCATALYST BY DISPERSIVE-X-RAY ABSORPTION-SPECTROSCOPY

Authors
ALLEN PG CONRADSON SD WILSON MS GOTTESFELD S RAISTRICK ID VALERIO J LOVATO M
Citation
Pg. Allen et al., IN-SITU STRUCTURAL CHARACTERIZATION OF A PLATINUM ELECTROCATALYST BY DISPERSIVE-X-RAY ABSORPTION-SPECTROSCOPY, Electrochimica acta, 39(16), 1994, pp. 2415-2418
Citations number
26
Categorie Soggetti
Electrochemistry
Journal title
Electrochimica acta → ACNP
ISSN journal
00134686
Volume
39
Issue
16
Year of publication
1994
Pages
2415 - 2418
Database
ISI
SICI code
0013-4686(1994)39:16<2415:ISCOAP>2.0.ZU;2-0
Abstract
Using in-situ dispersive EXAFS spectroscopy, we have monitored the num bers of Pt-O and Pt-Pt bonds and the charge on the Pt in parallel with cyclic voltammetry on Pt clusters in a polymer electrolyte fuel cell. Due to the increased sensitivity of this method, we detect small stru ctural changes not previously reported for these clusters and can corr elate these changes with specific reactions, ie H desorption or O adso rption in the double-layer region.