Details
| Original language | English |
|---|---|
| Pages (from-to) | 101-106 |
| Number of pages | 6 |
| Journal | Journal of Molecular Catalysis A: Chemical |
| Volume | 158 |
| Issue number | 1 |
| Publication status | Published - 18 Jul 2000 |
Abstract
Microstructured bimetallic surfaces prepared by optical lithography allow us to study dynamic effects under low pressure conditions with spatially resolving in situ techniques such as photoelectron emission microscopy (PEEM) and scanning photoelectron microscopy (SPEM). Reactions of the automotive catalytic converter on microstructured Pt/Rh surfaces have been investigated. The following effects have been observed: macroscopic size effects in reactivity due to diffusional coupling, front nucleation at Pt/Rh domain boundaries and the formation of stationary concentration patterns due to reversible adsorbate-induced segregation in bimetallic alloyed films. The experiments are complemented by simulations of the reactions for composite media aimed at 'microchemical engineering' of catalytic surfaces. (C) 2000 Elsevier Science B.V.
Keywords
- Catalysis, Diffusion, Microstructured bimetallic surfaces
ASJC Scopus subject areas
- Chemical Engineering(all)
- Catalysis
- Chemical Engineering(all)
- Process Chemistry and Technology
- Chemistry(all)
- Physical and Theoretical Chemistry
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In: Journal of Molecular Catalysis A: Chemical, Vol. 158, No. 1, 18.07.2000, p. 101-106.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Model studies of catalysis with microstructured bimetallic surfaces
AU - Imbihl, R.
PY - 2000/7/18
Y1 - 2000/7/18
N2 - Microstructured bimetallic surfaces prepared by optical lithography allow us to study dynamic effects under low pressure conditions with spatially resolving in situ techniques such as photoelectron emission microscopy (PEEM) and scanning photoelectron microscopy (SPEM). Reactions of the automotive catalytic converter on microstructured Pt/Rh surfaces have been investigated. The following effects have been observed: macroscopic size effects in reactivity due to diffusional coupling, front nucleation at Pt/Rh domain boundaries and the formation of stationary concentration patterns due to reversible adsorbate-induced segregation in bimetallic alloyed films. The experiments are complemented by simulations of the reactions for composite media aimed at 'microchemical engineering' of catalytic surfaces. (C) 2000 Elsevier Science B.V.
AB - Microstructured bimetallic surfaces prepared by optical lithography allow us to study dynamic effects under low pressure conditions with spatially resolving in situ techniques such as photoelectron emission microscopy (PEEM) and scanning photoelectron microscopy (SPEM). Reactions of the automotive catalytic converter on microstructured Pt/Rh surfaces have been investigated. The following effects have been observed: macroscopic size effects in reactivity due to diffusional coupling, front nucleation at Pt/Rh domain boundaries and the formation of stationary concentration patterns due to reversible adsorbate-induced segregation in bimetallic alloyed films. The experiments are complemented by simulations of the reactions for composite media aimed at 'microchemical engineering' of catalytic surfaces. (C) 2000 Elsevier Science B.V.
KW - Catalysis
KW - Diffusion
KW - Microstructured bimetallic surfaces
UR - http://www.scopus.com/inward/record.url?scp=0034622677&partnerID=8YFLogxK
U2 - 10.1016/S1381-1169(00)00048-0
DO - 10.1016/S1381-1169(00)00048-0
M3 - Article
AN - SCOPUS:0034622677
VL - 158
SP - 101
EP - 106
JO - Journal of Molecular Catalysis A: Chemical
JF - Journal of Molecular Catalysis A: Chemical
SN - 1381-1169
IS - 1
ER -