Details
| Original language | English |
|---|---|
| Pages (from-to) | 701-707 |
| Number of pages | 7 |
| Journal | SOLID STATE IONICS |
| Volume | 141-142 |
| Publication status | Published - 25 Jun 2001 |
| Event | 14th Intenational Symposium on the Reactivity of Solids - Budapest, Hungary Duration: 27 Aug 2000 → 31 Aug 2000 |
Abstract
Electrochemical polarization of porous metal electrodes on solid electrolytes often leads to an increase of their catalytic activity in heterogeneous reactions. Thin microstructured Pt films on single crystalline YSZ (yttria stabilized zirconia) are investigated as structurally and geometrically well-defined model systems in order to understand the origin of this effect. Photoelectron emission microscopy (PEEM) and scanning photoelectron microscopy (SPEM) have been applied as spatially resolving methods in situ to study the processes in the vicinity of the three-phase boundary (tpb). Measurements with SPEM show that atomic oxygen is created under anodic polarization and covers the Pt film homogeneously. A specific spillover species is not found, rather the formation of atomic oxygen is detected, which has the same O1s binding energy as chemisorbed oxygen from the gas phase.
Keywords
- Catalysis, Electrochemistry, Interfaces, Photoelectron emission microscopy, Scanning photoelectron microscopy
ASJC Scopus subject areas
- Chemistry(all)
- Materials Science(all)
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: SOLID STATE IONICS, Vol. 141-142, 25.06.2001, p. 701-707.
Research output: Contribution to journal › Conference article › Research › peer review
}
TY - JOUR
T1 - Electrocatalysis on Pt/YSZ electrodes
AU - Luerßen, B.
AU - Janek, J.
AU - Imbihl, R.
PY - 2001/6/25
Y1 - 2001/6/25
N2 - Electrochemical polarization of porous metal electrodes on solid electrolytes often leads to an increase of their catalytic activity in heterogeneous reactions. Thin microstructured Pt films on single crystalline YSZ (yttria stabilized zirconia) are investigated as structurally and geometrically well-defined model systems in order to understand the origin of this effect. Photoelectron emission microscopy (PEEM) and scanning photoelectron microscopy (SPEM) have been applied as spatially resolving methods in situ to study the processes in the vicinity of the three-phase boundary (tpb). Measurements with SPEM show that atomic oxygen is created under anodic polarization and covers the Pt film homogeneously. A specific spillover species is not found, rather the formation of atomic oxygen is detected, which has the same O1s binding energy as chemisorbed oxygen from the gas phase.
AB - Electrochemical polarization of porous metal electrodes on solid electrolytes often leads to an increase of their catalytic activity in heterogeneous reactions. Thin microstructured Pt films on single crystalline YSZ (yttria stabilized zirconia) are investigated as structurally and geometrically well-defined model systems in order to understand the origin of this effect. Photoelectron emission microscopy (PEEM) and scanning photoelectron microscopy (SPEM) have been applied as spatially resolving methods in situ to study the processes in the vicinity of the three-phase boundary (tpb). Measurements with SPEM show that atomic oxygen is created under anodic polarization and covers the Pt film homogeneously. A specific spillover species is not found, rather the formation of atomic oxygen is detected, which has the same O1s binding energy as chemisorbed oxygen from the gas phase.
KW - Catalysis
KW - Electrochemistry
KW - Interfaces
KW - Photoelectron emission microscopy
KW - Scanning photoelectron microscopy
UR - http://www.scopus.com/inward/record.url?scp=0141637943&partnerID=8YFLogxK
U2 - 10.1016/S0167-2738(01)00783-4
DO - 10.1016/S0167-2738(01)00783-4
M3 - Conference article
AN - SCOPUS:0141637943
VL - 141-142
SP - 701
EP - 707
JO - SOLID STATE IONICS
JF - SOLID STATE IONICS
SN - 0167-2738
T2 - 14th Intenational Symposium on the Reactivity of Solids
Y2 - 27 August 2000 through 31 August 2000
ER -