Faculty Profiles - HIBINO, Takashi

Papers - HIBINO, Takashi

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High-temperature hydrocarbon sensors based on a stabilized zirconia electrolyte and proton conductor-containing platinum electrode Reviewed

Hashimoto A., Hibino T., Mori K.t., Sano M.

Sensors and Actuators, B: Chemical Vol. 81 ( 1 ) page： 55 - 63 2001.12

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Sensors and Actuators, B: Chemical

The non-Nernstian behavior of zirconia-based oxygen sensors for 0-1000ppm C1-C5 hydrocarbons, carbon monoxide, and hydrogen was studied using various ion conductor-containing Pt electrodes in the presence of 10vol.% of oxygen at 600°C. The addition of a proton conductor, especially SrCe0.95Yb0.05O3-α (SCY), to the Pt electrode improved the sensitivity for the hydrocarbons over other reducing gases: -122mV for 1000ppm propene; -24mV for 1000ppm carbon monoxide; and -23mV for 1000ppm hydrogen. The EMF value of the cell was enhanced by the increasing carbon number of the hydrocarbons, the unsaturation of the C-C linkage, and the branching of the chain structure. A similar conclusion also applied to aromatic hydrocarbons: -81mV for 500ppm benzene; -96mV for 500ppm toluene; and -102mV for 500ppm p-xylene. This enhanced effect, as well as the addition effect of SCY, was discussed on the basis of the measurements of polarization curves for hydrocarbons and oxygen and the non-electrochemical oxidation of the hydrocarbons by oxygen. It was found that the added SCY did not inhibit the catalytic activities for the hydrocarbons, but decreased the cathodic reaction rate of oxygen, thus, shifting the mixed potential for the hydrocarbons to more negative values. © 2001 Elsevier Science B.V. All rights reserved.

DOI： 10.1016/S0925-4005(01)00931-5

Scopus

Proton conduction at the surface of Y-doped BaCeO3 Reviewed

Hibino T, Hashimoto A, Suzuki M, Sano M

JOURNAL OF PHYSICAL CHEMISTRY B Vol. 105 ( 46 ) page： 11399 - 11401 2001.11

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Journal of Physical Chemistry B

In our work, 25 mol % of Y3+-doped BaCeO3 (BCY25) showed an extremely low activation energy of 0.3 eV for proton conduction at the surface. The resulting overall conductivity at the surface reached 8.24 × 10-3 S cm-1 at 400 °C, which was 3, 8, and 28 times higher than conductivities in the bulk of BCY25, 20 mol % Sm3+-doped ceria, and 8 mol % yttriia-stabilized zirconia, respectively. A large H/D isotope effect strongly suggested that the enhanced proton conductivities were due to an advantageous jump of protons between adjacent oxide ions at the surface. Such fast proton conduction enabled an air/fuel sensor using BCY25 as the solid electrolyte to work at 200 °C or less.

DOI： 10.1021/jp0124342

Web of Science

Scopus

Mixed potentials at metal-electrode and proton-conducting electrolyte interfaces in hydrocarbon-oxygen mixtures Reviewed

Hibino T, Hashimoto A, Mori K, Sano M

JOURNAL OF PHYSICAL CHEMISTRY B Vol. 105 ( 43 ) page： 10648 - 10652 2001.11

Mixed potentials at metal-electrode and proton-conducting electrolyte interfaces in hydrocarbon-oxygen mixtures Reviewed

Hibino T., Hashimoto A., Mori K.T., Sano M.

Journal of Physical Chemistry B Vol. 105 ( 43 ) page： 10648 - 10652 2001.11

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Journal of Physical Chemistry B

Potentiometric sensors using different solid electrolytes, including proton, oxide-ion, and mixed proton and oxide-ion conductors, were fabricated to investigate a relationship between the mixed potential for C1-C4 hydrocarbons and ion conduction in the electrolyte in a mixture of hydrocarbons and oxygen at 600 °C. There was an increase in the mixed potential for the hydrocarbons with increasing proton conductivity or decreasing oxide-ion conductivity. The sensor using a SrCe0.95Yb0.05O3-α (SCY) electrolyte with a Pt electrode showed an enhancement of the mixed potential for the hydrocarbons by increasing the carbon number, branching the chain structure, and unsaturating the C-C linkage. The polarization curves for hydrocarbon oxidation and for oxygen reduction at the Pt/SCY interface were also measured. These results revealed that the mixed potential at the Pt/SCY interface was strongly dependent on the rate of abstraction of hydrogen atom from the hydrocarbon molecules.

DOI： 10.1021/jp012094k

Scopus

Proton conduction at the surface of Y-doped BaCeO3 Reviewed

Takashi Hibino, Atsuko hashimoto, Masanori Suzuki, Mitsuru Sano

The Journal of Physical Chemistry B Vol. 105 page： 11399-11401 2001.11

A solid oxide fuel cell using an exothermic reaction as the heat source Reviewed

Takashi Hibino, Atsuko Hashimoto, Takao Inoue, Jun-ichi Tokuno, Shin-ichiro Yoshida, Mitsuru Sano

Journal of the Electrochemical Society Vol. 148 page： A544-A549 2001.6

A solid oxide fuel cell using an exothermic reaction as the heat source Reviewed

Hibino T, Hashimoto A, Inoue T, Tokuno J, Yoshida S, Sano M

JOURNAL OF THE ELECTROCHEMICAL SOCIETY Vol. 148 ( 6 ) page： A544 - A549 2001.6

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Journal of the Electrochemical Society

Performance of a single-chamber solid oxide fuel cell was evaluated using a 0.15 mm thick Sm-doped ceria (SDC) electrolyte together with a 30 wl % SDC-Ni anode and a Sm0.5Sr0.5CoO3 cathode at heating temperatures below 500°C in a flowing mixture of butane and air. A large quantity of reaction heat, which was evolved by the partial oxidation of butane by oxygen at the anode, caused a temperature rise of more than 100°C at the anode, followed by thermal conduction to the cathode through the electrolyte. Simultaneously, the cell generated a large electromotive force of ca. 900 mV between the two electrodes. The resulting peak power density reached 245, 180, 105, and 38 mW cm 2 at heating temperatures of 450, 400, 350, and 300°C, respectively. The comparison of the butane fuel with the other hydrocarbon fuels showed that the fuel cell performance became enhanced, especially at reducing temperatures, as the carbon number of the hydrocarbon increased, and the chain structure was branched. © 2001 The Electrochemical Society. [DOI: 10.1149/1.1368098] All rights reserved.

DOI： 10.1149/1.1368098

Web of Science

Scopus

A mixed-potential gas sensor using a SrCe0.95Yb0.05O3-α electrolyte with a platinum electrode for detection of hydrocarbons Reviewed

Takashi Hibino, Atsuko Hashimoto, Ken-taro Mori, Mitsuru Sano

Electrochemical and Solid-State Letters Vol. 4 page： H9-H11 2001.5

A mixed-potential gas sensor using a SrCe0.95Yb0.05O3-alpha electrolyte with a platinum electrode for detection of hydrocarbons Reviewed

Hibino T, Hashimoto A, Mori K, Sano M

ELECTROCHEMICAL AND SOLID STATE LETTERS Vol. 4 ( 5 ) page： H9 - H11 2001.5

A mixed-potential gas sensor using a SrCe<inf>0.95</inf>Yb<inf>0.05</inf>O<inf>3-α</inf> electrolyte with a platinum electrode for detection of hydrocarbons Reviewed

Hibino T., Hashimoto A., Mori K.T., Sano M.

Electrochemical and Solid-State Letters Vol. 4 ( 5 ) 2001.5

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Electrochemical and Solid-State Letters

Mixed-potential type sensors using different ion conducting electrolytes with a Pt working electrode have been fabricated to investigate a relationship between the sensing properties for hydrocarbons and ion conduction in the electrolyte under oxidizing conditions at 600°C. There was an increase in the mixed potential for propene with increasing proton conduction or decreasing oxide ion conduction. The sensor using a SrCe0.95Yb0.05O3-α electrolyte showed an enhanced mixed potential for C1-C4 hydrocarbons by increasing the carbon number, unsaturating the C-C linkage, and branching the chain structure. In addition, this sensor barely showed the mixed potential for hydrogen, carbon monoxide, and nitrogen monoxide.

DOI： 10.1149/1.1363128

Scopus

Zirconia-based potentiometric sensors using metal oxide electrodes for detection of hydrocarbons Reviewed

Takashi Hibino, Atsuko Hashimoto, Shiro Kakimoto, Mitsuru Sano

Journal of The Electrochemical Society Vol. 148 page： H1-H5 2001.1

Zirconia-based potentiometric sensors using metal oxide electrodes for detection of hydrocarbons Reviewed

Hibino T, Hashimoto A, Kakimoto S, Sano M

JOURNAL OF THE ELECTROCHEMICAL SOCIETY Vol. 148 ( 1 ) page： H1 - H5 2001.1

Zirconia-based potentiometric sensors using metal oxide electrodes for detection of hydrocarbons Reviewed

Hibino T., Hashimoto A., Kakimoto S., Sano M.

Journal of the Electrochemical Society Vol. 148 ( 1 ) 2001.1

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Journal of the Electrochemical Society

The non-Nernstian behavior of zirconia-based electrochemical cells with various metal oxide electrodes for 0-500 ppm C1-C4 hydrocarbons, hydrogen, and carbon monoxide was studied in the presence of 10% oxygen at 600 °C. The cell using an In2O3 electrode exhibited a largely negative electromotive force (emf) for propene but gave moderately negative emfs for hydrogen and carbon monoxide. The addition of 0.1 wt % MnO2 to the In2O3 electrode significantly improved the selectivity of the parent electrode for propene over hydrogen and carbon monoxide. The negative emf of the cell using the MnO2-containing In2O3 electrode for the hydrocarbons became enhanced as the carbon number of the hydrocarbon increased, the C-C linkage was unsaturated, and the chain structure was branched. This enhanced effect, as well as the addition effect of MnO2, was discussed on the basis of the measurements of the polarization curves of the MnO2-containing In2O3 electrode for the hydrocarbons and oxygen and the nonelectrochemical oxidation of the hydrocarbons by oxygen. In addition, the MnO2-containing In2O3 electrode for the hydrocarbons was compared with an Au electrode with respect to sensitivity to the hydrocarbons and reproducibility of the sensing properties.

DOI： 10.1149/1.1344558

Scopus

High-temperature hydrocarbon sensors based on a stabilized zirconia electrolyte and proton conductor-containing platinum electrode Reviewed

Atsuko Hashimoto, Takashi Hibino, Ken-taro Mori, Mitsuru Sano

Sensors and Actuators B Vol. 81 page： 55-63 2001

Mixed potentials at metal-electrode and proton-conducting electrolyte interfaces in hydrocarbon-oxygen mixtures Reviewed

Takashi Hibino, Atsuko hashimoto, Ken-taro Mori, Mitsuru sano

The Journal of Physical Chemistry B Vol. 105 page： 10648-10652 2001

総説：単室作動形燃料電池の研究

日比野高士

セラミックス Vol. 36 page： 486-488 2001

Selective catalytic reduction of nitric oxide by ethane using sOxide membranes Reviewed

Takashi Hibino, Takao Inoue, Mitsuru Sano

Journal of the Electrochemical Society Vol. 147 page： 3745-3750 2000.10

Selective catalytic reduction of nitric oxide by ethane using solid oxide membranes Reviewed

Hibino T, Inoue T, Sano M

JOURNAL OF THE ELECTROCHEMICAL SOCIETY Vol. 147 ( 10 ) page： 3745 - 3750 2000.10

Selective catalytic reduction of nitric oxide by ethane using solid oxide membranes Reviewed

Hibino T., Inoue T., Sano M.

Journal of the Electrochemical Society Vol. 147 ( 10 ) page： 3745 - 3750 2000.10

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Journal of the Electrochemical Society

The Pt-catalyzed reduction of nitric oxide (NOx) using ethane as a reductant can be promoted by the application of positive potentials to the cell NO, C2H6, O2, Pt or (Pt + MxOy)|YSZ|Pt, air between 600 and 700°C. At an O2 concentration of 0% in the reactant gas stream, almost all of the oxygen species transported to the Pt catalyst through the yttria-stabilized zirconia is consumed in the reaction with NO and ethane, which cannot proceed by the supply of gaseous O2 in an amount equimolar to the transported oxygen species under open-circuit conditions. At O2 concentrations of 2-12% in the reactant gas stream, the oxygen species transported to the Pt catalyst shows a certain promotional effect on the reduction of NO by ethane. The promotional effect is further enhanced by the addition of 15 wt% Mn2O3 or 15 wt% MoO3 to the Pt catalyst: Both reaction rates at potentials of 2 V are ca. four times those under open-circuit conditions, although the reaction over the MoO3-containing Pt catalyst is accelerated by the application of not positive but negative potentials to the cell. The mechanism of the promotional effect is discussed on the overall kinetic studies.

DOI： 10.1149/1.1393968

Scopus

Single-chamber solid oxide fuel cells at intermediate temperatures with various hydrocarbon-air mixtures Reviewed

Takashi Hibino, Atsuko Hashimoto, Takao Inoue, Jun-ichi Tokuno, Shin-ichiro Yoshida, Mitsuru Sano

Journal of the Electrochemical Society Vol. 147 page： 2888-2892 2000.8

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Papers - HIBINO, Takashi