...Sebastian Molin; Mateusz Tolczyk; Maria Gazda; Piotr Jasinski In this paper composite supports for solid oxide fuel cells were fabricated and evaluated. Substrates were composed of stainless steel and yttria stabilized zirconia (YSZ) powders mixed in different volume ratios. Their sintering...

... more rapidly than the standard potential for the electrochemical oxidation of carbon to CO, which also has a positive slope due to a positive entropy change of the overall reaction. This extra high OCV is an additional argument for developing the DCFC in particular a DCFC at high temperatures in which...

...Shinn-Dar Wu; Chang-Pin Chou; Ay Su; Jenn-Jiang Hwang This paper aims to analyze the membrane electrode assembly (MEA) of the direct methanol fuel cell (DMFC) in order to provide a reference for the design of DMFC. The slow kinetics of methanol oxidation and whether the anode should be hydrophobic...

...I. Antepara; M. Rivas; I. Villarreal; N. Burgos; F. Castro Crofer can be considered as the reference interconnect material in solid oxide fuel cells (SOFCs) working under 800 ° C . Thanks to its thermal expansion coefficient, it is suitable to replace ceramic components, such as the interconnect...

...Antonin Faes; Henrik Lund Frandsen; Mikko Pihlatie; Andreas Kaiser; Darlene R. Goldstein One of the main drawbacks of anode-supported solid oxide fuel cell technology is the limited capability to withstand reduction and oxidation (“RedOx”) of the Ni phase. This study compares the effect of RedOx...

... cells electroless deposition nanoparticles oxidation platinum ruthenium platinum ruthenium deposition fuel cell methanol Direct methanol fuel cells (DMFCs) can have high energy density if concentrated methanol can be used as the fuel. They are potentially useful as a compact power...

...J. Froitzheim; L. Niewolak; M. Brandner; L. Singheiser; W. J. Quadakkers During the operation of solid oxide fuel cells (SOFCs) the Ni base anode and/or Ni-mesh is in direct contact with the ferritic steel interconnect or the metallic substrate. For assuring long-term stack operation a diffusion...

...S. Cordiner; G. de Simone A comprehensive computational model for the design of methane catalytic partial oxidation monolith reactors for hydrogen production has been developed and tested with respect to available experimental data. Allowing a simplified description of the heat release mechanism...

...N. B. Raberger; M. J. Stutz; N. Hotz; D. Poulikakos This work investigates numerically a catalytic postcombustor for a micro-solid oxide fuel cell (SOFC) system. The postcombustor oxidizes toxic and explosive carbon monoxide (CO) and hydrogen exiting a solid oxide fuel cell to carbon dioxide...

...Chun-Lin Chu; Jian-Yih Wang; Ruey-Yi Lee; Tien-Hsi Lee; Shyong Lee Ten iron-based alloys and nickel-based alloys were subjected to oxidation treatment in a hot air environment for various periods. In this investigation, all alloys contained a certain amount of Cr, and Cr 2 O 3 and ( Mn , Fe , Cr...

..., focusing on the importance of simulating direct oxidation of carbon monoxide. The mathematical model is solved in a 3D environment and the key issue is the validation comparing with experimental data, which is made in different operating conditions to establish the reliability of the presented model...

...P. P. George; V. G. Pol; A. Gedanken; A. Gabashivili; M. Cai; A. M. Mance; L. Feng; M. S. Ruthkosky Before mass produced automotive fuel cell technology can be made practical, the oxidative instability of the carbons currently, used as the catalyst support at the oxygen electrode, must be addressed...

... poisoning by reformed hydrogen fuel. We analyze the characteristics of the CO poisoned anode of the PEFC at 80 ° C including CO adsorption and electro-oxidation behaviors by current-voltage ( I ‐ V ) measurement and electrochemical impedance spectroscopy (EIS) to find parameters useful for the diagnosis. I...

...Hengyong Tu; Hong Lv; Qingchun Yu; Keao Hu; Xinjian Zhu Oxide anodes such as doped ceria offer improved tolerance for nonidealities in anode environment such as redox cycles, sulfur and other poisons, and hydrocarbons. Mixed-valence transition element in ceria provides an additional redox couple...

... via the electrochemical oxidation technique. Both methods show the same trend of methanol crossover of different membranes in this study. Nafion 211 was found to present the highest degree of methanol crossover, however, its’ best performance implied the fact that the influence of the cell resistance...

... electrodes due to their high activity for H 2 oxidation and O 2 reduction under PEMFC conditions. Recently, ammonium hexachloroplatinate (IV) ( ( NH 4 ) 2 PtCl 6 ) has been shown to be a good precursor of metallic Pt by thermal decomposition. In addition, multi-walled carbon nanotubes (MWCNTs) present...

...-oxidation kinetics, (b) alcohol crossover, and (c) electrode delamination. This article briefly reviews DAFCs’ state of the art, the pertinent work done for the localization and quantification of the above-mentioned problems and the work aiming at the identification and use of novel materials which could...

.../oxidation and thermal cycling. On the other hand, another focus lies in the electrochemical testing of short stacks in the cassette arrangement. The microstructure of the cells was characterized by optical microscopy, scanning electron microscopy (SEM), X-ray diffraction, and energy dispersive microanalysis...

... limits of 1.0 and 1.2 V leads to degradation effects that result in decreasing of the electrochemical surface area (ESA) of the catalyst. The comparison of an ESA decrease for a 1.0 and 1.2 V sweep limit after 1000 cycles indicated that the higher degradation effects are due to the oxidation of carbon...

.... A precommercial natural gas fuel processor has been chosen as hydrogen generator. This fuel processor contains all the elements—desulphurizer, steam reformer, CO shift converter, CO preferential oxidation (PROX) reactor, steam generator, burner, and heat exchanger—in one package. The reforming system has been...