Takashi Hibino

The performance of a single-chamber solid oxide fuel cell was studied using a ceria-based solid electrolyte at temperatures below 773 kelvin. Electromotive forces of approximately 900 millivolts were generated from the cell in a flowing mixture of ethane or propane and air, where the solid electrolyte functioned as a purely ionic conductor. The electrode-reaction resistance was negligibly small in the total internal resistances of the cell. The resulting peak power density reached 403 and 101 mi

The performance of a solid oxide fuel cell (SOFC) with the configuration, 3 wt % Pd-loaded FeO|25 mol % -doped air, was studied between 350 and 600°C. The BCY25 electrolyte showed higher ion conductivities than 8 mol % yttria-stabilized zirconia (YSZ) below 800°C and 20 mol % -doped ceria (SDC) below 600°C, thus having the smallest ohmic resistance loss during cell discharge below 600°C among the three electrolytes. The overpotentials of the Pd-loaded FeO anode and the cathode at 600°C were 25 a

Electrocatalytic oxidation of methane over anodes in single-chamber solid oxide fuel cells, 0-10 wt % Pd-30 wt % <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="ML1" overflow="scroll"> <mml:msub> <mml:mi mathvariant="normal">Ce</mml:mi> <mml:mrow> <mml:mn>0.8</mml:mn> </mml:mrow> </mml:msub> <mml:msub> <mml:mi mathvariant="normal">Sm</mml:mi> <mml:mrow> <mml:mn>0.2</mml:mn> </mml:mrow> </mml:msub> <mml:msub> <mml:mo>O</mml:mo> <mml:mrow> <mml:mn>1.9</mml:mn> </mml:m

The promotion of direct electrochemical oxidation of hydrocarbons in a solid oxide fuel cell was investigated using a ceria-based electrolyte with different noble metals-containing anode at 600°C. The objective was to avoid interference from a large amount of steam and being produced by discharging the cell, because these gases degrade the anode performance, especially at a high fuel utilization. Ru was an effective catalyst for removing these gases from the anode surface due to its high catalyt

The performance of a single‐chamber solid oxide fuel cell (SOFC) was studied between 350 and 900°C in flowing mixtures of methane, ethane, propane, or liquefied petroleum gas and air with a fuel/air volume ratio of one, where their oxidation proceeded safely without explosion. Among all tested electrode materials, cermet and oxide functioned best as the anode and cathode, respectively, in various gas mixtures. A cell constructed from a electrolyte with the two electrodes generated >900 mV in a m

Intermediate-temperature fuel cells have received much recent attention as next generation energy sources. In particular, current efforts are devoted to developing proton conductors that operate at 120 °C or more and at low relative humidity. Proton conduction in several metal pyrophosphates (MP2O7, M = Sn, Ti, Si, Ge, Ce, and Zr) that have the potential to meet the demands for intermediate-temperature fuel cell applications are reviewed with an emphasis on the material aspects.

An antisense gene for Aralia cordata cinnamyl alcohol dehydrogenase (CAD) was introduced into tobacco plants. Two transgenic plants showed 55 and 20% reduction of the CAD activity compared to that of the control plant. Lignin content measured by the acetyl bromide method showed no significant differences between these plants and the control plant. However, the content of p-hydroxycinnamaldehyde groups in lignin was higher in the transgenic than in the control plants. The increase of p-hydroxycin