Faculty Profiles - HIBINO, Takashi

Papers - HIBINO, Takashi

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Intermediate-temperature SOFCs with Ru-catalyzed Ni-cermet anodes Reviewed

Hashimoto A., Hirabayashi D., Hibino T., Sano M.

Key Engineering Materials Vol. 269 page： 151 - 154 2004

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Key Engineering Materials

The promotion of the 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 attempted approach toward this objective was to avoid interference from a large amount of steam and CO2 products, because they degrade the anode performance. Ru was an effective catalyst for removing these gases from the anode surface due to its high catalytic activity for the steam and CO2 reforming of hydrocarbons. This permitted a smooth access of the unreacted hydrocarbons to the three-phase boundary, thus resulting in a noticeably high anode performance. The resulting peak power density reached 750 mW cm-2 with dry methane, which was comparable to the peak power density of 769 mW cm -2 with wet hydrogen.

DOI： 10.4028/www.scientific.net/kem.269.151

Scopus

Ru-catalyzed anode materials for direct hydrocarbon SOFCs Reviewed

Hibino T, Hashimoto A, Yano M, Suzuki M, Sano M

ELECTROCHIMICA ACTA Vol. 48 ( 17 ) page： 2531 - 2537 2003.7

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Electrochimica Acta

A solid oxide fuel cell using a thin ceria-based electrolyte film with a Ru-catalyzed anode was directly operated on hydrocarbons, including methane, ethane, and propane, at 600 °C. The role of the Ru catalyst in the anode reaction was to promote the reforming reaction of the unreacted hydrocarbons by the produced steam and CO2, which avoided interference from steam and CO2 in the gas-phase diffusion of the fuels. The resulting peak power density reached 750 mW cm-2 with dry methane, which was comparable to the peak power density of 769 mW cm-2 with wet (2.9 vol.% H2O) hydrogen. More important was the fact that the cell performance was maintained at a high level regardless of the change in the methane utilization from 12 to 46% but was significantly reduced by increasing the hydrogen utilization from 13 to 42%. While the anodic reaction of hydrogen was controlled by the slow gas diffusion, the anodic reaction of methane was not subject to the onset of such a gas-diffusion process. © 2003 Elsevier Science Ltd. All rights reserved.

DOI： 10.1016/S0013-4686(03)00296-2

Web of Science

Scopus

A resistor-type sensor for the detection of CO in reformed gases Reviewed Open Access

Atsuko Hashimoto, Takashi Hibino, Kazuyo Kobayashi, Mitsuru Sano

Electrochemistry Vol. 71 page： 398-401 2003.6

A resistor-type sensor for the detection of CO in reformed gases Reviewed Open Access

Hashimoto A, Hibino T, Kobayashi K, Sano M

ELECTROCHEMISTRY Vol. 71 ( 6 ) page： 398 - 401 2003.6

A resistor-type sensor for the detection of CO in reformed gases Reviewed Open Access

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

Electrochemistry Vol. 71 ( 6 ) page： 398 - 401 2003.6

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Electrochemistry

Resistor-type sensor devices using a samaria-doped ceria electrolyte with different working electrodes were fabricated for detecting carbon monoxide (CO) in reformed gases between 250 and 425°C. The electrochemical oxidation of H2 over a Pd working electrode was the most sensitive to a reversible poisoning by 50-4000 ppm CO in the presence of 50% hydrogen, 10% carbon dioxide, and 6% water vapor, which provided an increase in the electrode-reaction resistance at the electrode-electrolyte interface. The resulting sensor signal was strongly dependent on the CO concentration, where linear relationships between the signal and the logarithm of the CO concentration were obtained, especially below 1000 ppm with 90% response and 90% recovery times of about 20 seconds. An improvement in the CO-sensing properties of the present sensor device above 300°C was also carried out by the addition of Au to the Pd working electrode.

DOI： 10.5796/electrochemistry.71.398

Open Access

Scopus

Ru-catalyzed anode materials for direct hydrocarbon SOFCs Reviewed

Takashi Hibino, Atsuko Hashimoto, Masaya Yano, Masanori Suzuki, Mitsuru Sano

Electrochimica Acta Vol. 48 page： 2531-2537 2003

総説：SOFCの低温作動と混合ガス発電を可能にする電極触媒の開発

日比野高士

燃料電池 Vol. 2 page： 36-41 2003

総説：高性能デバイスの開発を目指して

鈴木憲司，日比野高士

Vol. 16 page： 42-42 2003

An intermediate-temperature solid oxide fuel cell providing higher performance with hydrocarbons than with hydrogen Reviewed

Takashi Hibino, Atsuko Hashimoto, Kazuyo Asano, Masaya Yano, Mosanori Suzuki, Shin-ichiro Yoshida, Mitsuru Sano

Electrochemical and Solid-State Letters Vol. 5 page： A242-A244 2002.11

A solid oxide fuel cell using Y-doped BaCeO3 with Pd-loaded FeO anode and Ba0.5Pr0.5CoO3 cathode at low temperatures Reviewed

Takashi Hibino, Atsuko Hashimoto, Masanori Suzuki, Mitsuru Sano

Journal of the Electrochemical Society Vol. 149 page： A1503-A1508 2002.11

A solid oxide fuel cell using Y-doped BaCeO3 with Pd-loaded FeO anode and Ba0.5Pr0.5CoO3 cathode at low temperatures Reviewed

Hibino T, Hashimoto A, Suzuki M, Sano M

JOURNAL OF THE ELECTROCHEMICAL SOCIETY Vol. 149 ( 11 ) page： A1503 - A1508 2002.11

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

The performance of a solid oxide fuel cell (SOFC) with the configuration, H2, 3 wt % Pd-loaded FeO|25 mol % Y3+-doped BaCeO3 (BCY25)|Ba0.5Pr0.5CoO3, 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 % Sm3+-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 Ba0.5Pr0.5CoO3 cathode at 600°C were 25 and 53 mV, respectively, at 200 mA cm-2, which were less than one-fourth those of a Pt electrode. The resulting peak power density was higher than those obtained for two SOFCs using the YSZ and SDC electrolytes with a Ni-SDC anode and a Sm0.5Sr0.5CoO3 cathode below 600°C.

DOI： 10.1149/1.1513983

Web of Science

Scopus

An intermediate-temperature solid oxide fuel cell providing higher performance with hydrocarbons than with hydrogen Reviewed

Hibino T, Hashimoto A, Asano K, Yano M, Suzuki M, Sano M

ELECTROCHEMICAL AND SOLID STATE LETTERS Vol. 5 ( 11 ) page： A242 - A244 2002.11

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

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 CO2 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 catalytic activity for the steam and CO2 reforming of hydrocarbons. The resulting peak power densities reached 750 mW cm-2 with dry methane, which was comparable to the peak power density of 769 mW cm-2 with wet (2.9 vol % H2O) hydrogen. The cell performance was maintained at a high level regardless of the change in methane utilization from 12 to 46% but was significantly reduced by increasing hydrogen utilization from 13 to 42%. The anodic reaction of hydrogen was controlled by the slow surface diffusion of hydrogen, while the anodic reaction of methane was not subject to the onset of such a gas-diffusion process.

DOI： 10.1149/1.1508551

Web of Science

Scopus

Solid oxide fuel cells that enable the detection of CO in reformed gases Reviewed

Atsuko Hashimoto, Takashi Hibino, Mitsuru Sano

Sensors and Actuators B Vol. 86 page： 12-19 2002.9

Solid oxide fuel cells that enable the detection of CO in reformed gases Reviewed

Hashimoto A, Hibino T, Sano M

SENSORS AND ACTUATORS B-CHEMICAL Vol. 86 ( 1 ) page： 12 - 19 2002.8

Solid oxide fuel cells that enable the detection of CO in reformed gases Reviewed

Hashimoto A., Hibino T., Sano M.

Sensors and Actuators, B: Chemical Vol. 86 ( 1 ) page： 12 - 19 2002.8

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

Solid oxide fuel cells (SOFCs) using Pd metal as the anode were fabricated for detection of CO in a flowing mixture of 0-4000 ppm CO, 50% H2, 10% CO2 and 6% H2O vapor between 300 and 400 °C. When 20 mol% Sm3+-doped CeO2 (SDC) was used as the electrolyte, the Pd anode was subjected to a large and reversible change in the anodic-reaction resistance with the CO concentration. This behavior brought about an almost linear relationship between the electromotive force (EMF) generated from the cell or the short-circuit current through the cell and the logarithm of the CO concentration. In both signals, the minimum detectable CO concentration was 50 ppm, and the 90% response and 90% recovery times were about 60 s. However, the EMF of the cell at a CO concentration of 0ppm significantly deviated from the theoretical value, which made it difficult to obtain reproducible data. In addition, the current signal of a few μA at a CO concentration of 4000 ppm was not large enough to monitor the CO concentration exactly. The improvement of these problems could be achieved by using 25 mol% Y3+-doped BaCeO3 (BCY25) with higher ionic conduction as the electrolyte: the EMF of the cell at a CO concentration of 0 ppm was near the theoretical value; the current signal reached 66 μA at a CO concentration of 4000 ppm. © 2002 Elsevier Science B.V. All rights reserved.

DOI： 10.1016/S0925-4005(02)00068-0

Scopus

A fuel-cell-type sensor for detection of carbon monoxide in reformed gases Reviewed Open Access

Atsuko Hashimoto, Takashi Hibino, Mitsuru Sano

Electrochemical and Solid-State Letters Vol. 5 page： H1-H3 2002.2

A solid oxide fuel cell with a novel geometry that eliminates the need for preparing a thin electrolyte film Reviewed

Takashi Hibino, Atsuko Hashimoto, Masanori Suzuki, Masaya Yano, Shin-ichiro Yoshida, Mitsuru Sano

Journal of the Electrochemical Society Vol. 149 page： A195-A200 2002.2

High performance anodes for SOFCs operating in methane-air mixture at reduced temperatures Reviewed

Takashi Hibino, Atsuko Hashimoto, Masaya Yano, Masanori Suzuki, Shin-ichiro Yoshida, Mitsuru Sano

Journal of The Electrochemical Society Vol. 149 page： A133-A136 2002.2

A fuel-cell-type sensor for detection of carbon monoxide in reformed gases Reviewed Open Access

Hashimoto A, Hibino T, Sano M

ELECTROCHEMICAL AND SOLID STATE LETTERS Vol. 5 ( 2 ) page： H1 - H3 2002.2

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

A solid oxide fuel cell using a sumaria-doped ceria electrolyte with a Pd anode was fabricated for detecting carbon monoxide (CO) in reformed gases at 300°C. The CO concentration in a flowing mixture of 0-4000 ppm CO, 50% hydrogen, 10% carbon dioxide, and 6% water vapor was related to a decrease in both the electromotive force generated from the cell and the short-circuits current through the cell due to a reversible change in the anodic resistance with the CO concentration. In both signals, the minimum detectable concentration was 50 ppm, and the 90% response and 90% recovery times were as short as 20 s.

DOI： 10.1149/1.1432243

Web of Science

Scopus

A solid oxide fuel cell with a novel geometry that eliminates the need for preparing a thin electrolyte film Reviewed

Hibino T, Hashimoto A, Suzuki M, Yano M, Yoshida S, Sano M

JOURNAL OF THE ELECTROCHEMICAL SOCIETY Vol. 149 ( 2 ) page： A195 - A200 2002.2

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

We propose a solid oxide fuel cell design based on a configuration of two electrodes on the same surface of the electrolyte in a flowing mixture of different hydrocarbons and air between 500 and 600°C. The ohmic resistance can be reduced without using a thin electrolyte film due to a significantly enhanced performance by the approach of the two electrodes to each other on the smooth electrolyte surface. The fuel cell performance, especially at reduced temperatures, is further improved by using a more reactive hydrocarbon fuel and a more catalytically active anode. The resulting power density reaches 122 mW cm-2 using 2 mm thicer electrolyte at 500°C. © 2002 The Electrochemical Society. All rights reserved.

DOI： 10.1149/1.1431573

Web of Science

Scopus

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Papers - HIBINO, Takashi