ELECTROCHEMICAL PROMOTION OF PT CATALYST ELECTRODES DEPOSITED ON NA2ZR2SI2PO12 DURING ETHYLENE OXIDATION

Authors
PETROLEKAS PD BROSDA S VAYENAS CG
Citation
Pd. Petrolekas et al., ELECTROCHEMICAL PROMOTION OF PT CATALYST ELECTRODES DEPOSITED ON NA2ZR2SI2PO12 DURING ETHYLENE OXIDATION, Journal of the Electrochemical Society, 145(5), 1998, pp. 1469-1477
Citations number
38
Categorie Soggetti
Electrochemistry,"Materials Science, Coatings & Films
Journal title
Journal of the Electrochemical Society → ACNP
ISSN journal
00134651
Volume
145
Issue
5
Year of publication
1998
Pages
1469 - 1477
Database
ISI
SICI code
0013-4651(1998)145:5<1469:EPOPCE>2.0.ZU;2-D
Abstract
The electrochemical promotion of Pt catalyst electrode films interface d with Na3Zr2Si2PO12 (NASICON), a sodium ion conductor, was investigat ed during ethylene oxidation. At 430 degrees C, electrochemical Na+ su pply to the Pt catalyst under near-stoichiometric ethylene-to-oxygen r atios causes an up to tenfold catalytic rate enhancement for Na covera ges of 0.03-0.08. The behavior of the system is discussed in terms of previous electrochemical promotion studies using sodium-ion conductors . On the basis of the kinetic data the promotional role of sodium is a ttributed to enhanced oxygen chemisorption on the Pt catalyst-electrod e surface.