Fundamental Aspects of Direct Liquid-Alcohol Fuel Cells
Zusammenfassung der Projektergebnisse
The developed high temperature/pressure DEMS set-up allows to gain kinetic and mechanistic information on electrocatalytic reactions under fuel cell relevant, but nevertheless welldefined reaction and transport conditions (catalyst loading and utilization, controlled mass transport). It can provide data for the mass transport and reaction modeling, and thus reduces the necessity of fuel cell measurements for catalyst screening. In contrast to the on-line mass spectrometric sensing of the exhaust of a fuel cell, which detects the integral response of the overall system, these model studies determine intrinsic kinetic and mechanistic reaction properties (differential reaction conditions). The temperatures necessary for complete oxidation of the fuel to CO2 can be estimated from the model studies by extrapolation of the temperature dependence of the overall reaction (measured Faradaic current) and of the partial current for CO2 production up to their crossing point. Due to its modular design, the HT/HP DBMS set-up can be easily modified for model studies of tbe oxygen reduction reaction at high temperatures/pressures, with the simultaneous detecfion of hydrogen peroxide under fuel cell relevani conditions.
Projektbezogene Publikationen (Auswahl)
- Ethanol Electrooxidation on a Carbon-Supported Pt Catalyst: Reaction Kinetics and Product Yields. J. Phys. Chem. B 108 (2004) 19413- 19424
H. Wang, Z. Jusys and R. J. Behm
- Electrooxidation of acetaldehyde on carbon-supported Pt, PtRu and Pt3Sn and unsupported PtRu0.1 catalysts: A quantitative DEMS study. J. Appl. Electrochem. 36 (2006) 1187-1198
H. Wang, Z. Jusys, and R.J. Behm
- Ethanol electro-oxidation on carbon-supported Pt, PtRu and Pt3Sn catalysts: A quantitative DEMS study. J. Power Sources 154 (2006) 351- 359
H. Wang, Z. Jusys, and R.J. Behm
- Ethanol oxidation on novel, carbon supported Pt alloy catalysts - Model studies under defined diffusion conditions. Electrochim. Acta 52 (2006) 221-233
L. Colmenares, H. Wang, Z. Jusys, L. Jiang, S. Yan, G.Q. Sun, and R.J. Behm
- Ethylene glycol electrooxidation on carbon supported Pt, PtRu andPt3Sn catalysts—A comparatiye DEMS study. J. Power Sources 155(2006)33-46
H. Wang, Y. Zhao, Z. Jusys, and R.J. Behm
- Adsorption and oxidation of ethanol on colloid-based Pt/C, PtRu/C and Pt3Sn/C catalysts: In-situ FTIR spectroscopy and on-line DEMS studies. Chem. Phys. Phys. Chem. 9 (2007) 2686-2696
Q. Wang, G.Q. Sun, L.H. Jiang, Q. Xin, S.G. Sun, Y.X. Jiang, S.P. Chen, Z. Jusys, and R.J. Behm
- Ethanol electrooxidation on novel carbon supported Pt/SnOX/C catalysts with varied Pt:Sn ratio. Electrochim. Acta 53 (2007) 377-389
L. Jiang, L. Colmenares, Z. Jusys, G.Q. Sun, and R.J. Behm
