Ionics

, Volume 6, Issue 1–2, pp 119–126 | Cite as

Electrochemical promotion of NO reduction by C3H6 and CO on Rh/YSZ catalyst — Electrodes

  • C. Pliangos
  • C. Raptis
  • Th. Badas
  • C. G. Vayenas
Article

Abstract

The selective catalytic reduction of NO by propylene or CO in the presence of excess oxygen is a system of great technological importance. The effect of Electrochemical Promotion (or Non-faradaic Electrochemical Modification of Catalytic Activity — NEMCA) was used to promote this reaction (C3H6 or CO/NO/O2) on Rh/YSZ catalyst-electrodes.

It was found that both the catalytic activity and the selectivity of the Rh catalyst-electrode is affected dramatically upon varying its potential with respect to a Au pseudoreference electrode. Catalytic rate enhancements up to 15000% and 6000% were observed in the case of NO reduction by propylene, while the product selectivity to N2 production is affected significantly (up to 200%) upon positive potential application. Remarkable promotion of the catalytic activity was also observed in the case of NO reduction by CO, since up to 20-fold increases both in catalytic rates and in NO conversion were obtained under NEMCA conditions.

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Copyright information

© IfI - Institute for Ionics 2000

Authors and Affiliations

  • C. Pliangos
    • 1
  • C. Raptis
    • 1
  • Th. Badas
    • 1
  • C. G. Vayenas
    • 1
  1. 1.Department of Chemical EngineeringUniversity of PatrasPatrasGreece

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