Details
| Original language | English |
|---|---|
| Pages (from-to) | 509-520 |
| Number of pages | 12 |
| Journal | Zeitschrift fur Physikalische Chemie |
| Volume | 216 |
| Issue number | 4 |
| Publication status | Published - 2002 |
Abstract
The influence of a cycled gas feed on reactions of the automotive catalytic converter has been investigated under low pressure conditions (p < 10-3 mbar) with a Pt(100) surface as catalyst. Catalytic NO reduction with CO or H2 as reducing agent was studied in binary mixtures. The reactions were forced around the unstable high rate branch of the rate vs. T hysteresis by applying a square-wave modulation of pCO (pH2). For the NO + CO reaction the yield vs frequency dependence exhibits a pronounced maximum. The pressure modulation causes a periodic structural transformation 1 × 1 ↔ hex. The frequency dependence of the yield is largely related to the average concentration of defects which are created during the phase transition.
Keywords
- NO Reduction, Periodic Forcing, Pt(100) Surface, Surface Defects, Surface Phase Transition
ASJC Scopus subject areas
- Chemistry(all)
- Physical and Theoretical Chemistry
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In: Zeitschrift fur Physikalische Chemie, Vol. 216, No. 4, 2002, p. 509-520.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Periodic forcing of NO reduction on a Pt(100) surface
AU - Schütz, Eckart
AU - Imbihl, Ronald
PY - 2002
Y1 - 2002
N2 - The influence of a cycled gas feed on reactions of the automotive catalytic converter has been investigated under low pressure conditions (p < 10-3 mbar) with a Pt(100) surface as catalyst. Catalytic NO reduction with CO or H2 as reducing agent was studied in binary mixtures. The reactions were forced around the unstable high rate branch of the rate vs. T hysteresis by applying a square-wave modulation of pCO (pH2). For the NO + CO reaction the yield vs frequency dependence exhibits a pronounced maximum. The pressure modulation causes a periodic structural transformation 1 × 1 ↔ hex. The frequency dependence of the yield is largely related to the average concentration of defects which are created during the phase transition.
AB - The influence of a cycled gas feed on reactions of the automotive catalytic converter has been investigated under low pressure conditions (p < 10-3 mbar) with a Pt(100) surface as catalyst. Catalytic NO reduction with CO or H2 as reducing agent was studied in binary mixtures. The reactions were forced around the unstable high rate branch of the rate vs. T hysteresis by applying a square-wave modulation of pCO (pH2). For the NO + CO reaction the yield vs frequency dependence exhibits a pronounced maximum. The pressure modulation causes a periodic structural transformation 1 × 1 ↔ hex. The frequency dependence of the yield is largely related to the average concentration of defects which are created during the phase transition.
KW - NO Reduction
KW - Periodic Forcing
KW - Pt(100) Surface
KW - Surface Defects
KW - Surface Phase Transition
UR - http://www.scopus.com/inward/record.url?scp=0036348793&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0036348793
VL - 216
SP - 509
EP - 520
JO - Zeitschrift fur Physikalische Chemie
JF - Zeitschrift fur Physikalische Chemie
SN - 0044-3336
IS - 4
ER -