منابع مشابه
Origin of electrolyte-dopant dependent sulfur poisoning of SOFC anodes.
The mechanisms governing the sulfur poisoning of the triple phase boundary (TPB) of Ni-XSZ (X2O3 stabilized zirconia) anodes have been investigated using density functional theory. The calculated sulfur adsorption energies reveal a clear correlation between the size of the cation dopant X(3+) and the sulfur tolerance of the Ni-XSZ anode; the smaller the ionic radius, the higher the sulfur toler...
متن کاملEffect of Au and/or Mo Doping on the Development of Carbon and Sulfur Tolerant Anodes for SOFCs—A Short Review
• The kinetics of CH4 steam reforming and partial oxidation are determined by the oxidation rate of CHx adsorbed species • The modification of the Ni/YSZ and Ni/GDC with Au and/or Au-Mo results in differentiated structures of atomically dispersed Au and/or Au-Mo at the surface and the bulk of the Ni particles. • At lean S/C NiAu/YSZ selectively oxidizes electrochemically the catalytically produ...
متن کاملDevelopment of ceria-supported sulfur tolerant nanocatalysts: Rh-based formulations
The conversion of logistics fuels to hydrogen by steam reforming is attractive but poses great challenge since they contain sulfur up to about 3000 ppm leading to catalyst deactivation due to sulfur poisoning. In this paper, we report the fabrication of nominally doped nanoscale ceriasupported rhodium catalyst matrices for their performance evaluation in sulfur-laden fuel streams. Systematic st...
متن کاملPrediction of hydrogen flux through sulfur-tolerant binary alloy membranes.
Metal membranes play a vital role in hydrogen purification. Defect-free membranes can exhibit effectively infinite selectivity but must also provide high fluxes, resistance to poisoning, long operational lifetimes, and low cost. Alloying offers one route to improve on membranes based on pure metals such as palladium. We show how ab initio calculations and coarse-grained modeling can accurately ...
متن کاملThe Influence of Sulfur Poisoning and YSZ Substrate Orientation on Electrochemical Properties of Nickel Pattern Anodes
Micro-patterned Ni thin films with well-defined 2D-structures are useful to examine electrochemical reaction kinetics of SOFC anodes. In this work, an electrode preparation method is developed yielding stable Ni pattern electrodes on YSZ, which facilitate long term measurements. Moreover, these stable electrodes allowed investigating the effect of the YSZ substrate orientation on the polarizati...
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ژورنال
عنوان ژورنال: ECS Proceedings Volumes
سال: 2005
ISSN: 0161-6374,2576-1579
DOI: 10.1149/200507.1437pv