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Journal Articles

Effect of hydrocarbons on the efficiency of catalytic reactor of detritiation system in an event of fire

Edao, Yuki; Sato, Katsumi; Iwai, Yasunori; Hayashi, Takumi

Journal of Nuclear Science and Technology, 53(11), p.1831 - 1838, 2016/11

 Times Cited Count:6 Percentile:56.63(Nuclear Science & Technology)

Journal Articles

Mechanisms of oxygen reduction reactions for carbon alloy catalysts via first principles molecular dynamics

Ikeda, Takashi; Hou, Z.*; Chai, G.-L.*; Terakura, Kiyoyuki*

Hyomen Kagaku, 36(7), p.345 - 350, 2015/07

Carbon alloy catalysts (CACs) are one of promising candidates for platinum-substitute cathode catalysts for polymer electrolyte fuel cells. We have investigated possible mechanisms of oxygen reduction reactions (ORRs) for CACs via first-principles-based molecular dynamics simulations. In this contribution, we review possible ORRs at likely catalytic sites of CACs suggested from our simulations.

Journal Articles

Fabrication and characterization of C-doped anatase TiO$$_{2}$$ photocatalysts

Choi, Y.; Umebayashi, Tsutomu; Yoshikawa, Masahito

Journal of Materials Science, 39(5), p.1837 - 1839, 2004/03

 Times Cited Count:221 Percentile:98.02(Materials Science, Multidisciplinary)

Carbon (C)-doped anatase TiO$$_{2}$$ photocatalysts have been prepared by the oxidative annealing of TiC powders at 623 K for 50-100 hrs. From XRD and XPS analysis, it is clear that C is incorporated into O site of the TiO$$_{2}$$ lattice. Diffuse reflectance spectroscopy (DRS) showed that the optical absorption edge of the C-doped anatase TiO$$_{2}$$ shifted to lower energy compared with that of pure anatase TiO$$_{2}$$. The decomposition of methylene blue (MB) adsorbed on the C-doped sample was observed under a visible light range of 420-500 nm. We conclude that substitution of C for O in the TiO$$_{2}$$ leads to a photocatalytic decomposition of MB under visible light irradiation.

Journal Articles

Fabrication of TiO$$_{2}$$ photocatalysts by oxidative annealing of TiC

Choi, Y.; Umebayashi, Tsutomu; Yamamoto, Shunya; Tanaka, Shigeru

Journal of Materials Science Letters, 22(17), p.1209 - 1211, 2003/09

 Times Cited Count:45 Percentile:78.68(Materials Science, Multidisciplinary)

no abstracts in English

JAEA Reports

Catalytic activity of catalysts for steam reforming reaction (Contract research)

Ohashi, Hirofumi; Inagaki, Yoshiyuki

JAERI-Tech 2003-046, 47 Pages, 2003/05

JAERI-Tech-2003-046.pdf:3.15MB

no abstracts in English

Journal Articles

Self-regeneration of a Pd-perovskite catalyst for automotive emissions control

Nishihata, Yasuo; Mizuki, Junichiro; Akao, Takahiro; Tanaka, Hirohisa*; Uenishi, Mari*; Kimura, Mareo*; Okamoto, Tokuhiko*; Hamada, Noriaki*

Nature, 418(6894), p.164 - 167, 2002/07

 Times Cited Count:863 Percentile:99.82(Multidisciplinary Sciences)

no abstracts in English

Journal Articles

Preparation of TiO$$_{2}$$-anatase film on Si(001) substrate with TiN and SrTiO$$_{3}$$ as buffer layers

Sugiharuto; Yamamoto, Shunya; Sumita, Taishi; Miyashita, Atsumi

Journal of Physics; Condensed Matter, 13(13), p.2875 - 2881, 2001/04

 Times Cited Count:14 Percentile:60.75(Physics, Condensed Matter)

An epitaxial TiO$$_{2}$$-anatase thin film was grown on the Si(001) substrate with SrTiO$$_{3}$$/TiN as the buffer layers by pulsed laser deposition technique under an oxygen gas supply. The characterization of the epitaxial TiO$$_{2}$$-anatase film was performed using the X-ray diffraction method. The crystallographic relationships between the TiO$$_{2}$$-anatase film and SrTiO$$_{3}$$/TiN buffer layers were analyzed by the $$theta$$-2$$theta$$ scan and pole figure measurement. The growth direction of the films was determined as $$rm TiO_{2}langle 001rangle$$ / $$rm SrTiO_{3}langle 001rangle$$ / $$rm TiNlangle 001rangle$$ / $$rm Silangle 001rangle$$ and their in-plane relationship $$rm TiO_{2}{110}$$ // $$rm SrTiO_{3}{100}$$ // $$rm TiN{100}$$ // $$rm Si{100}$$. The crystalline quality of TiO$$_{2}$$-anatase was examined by the rocking curve analysis. The composition of the thin film packaging was characterized by Rutherford backscattering spectrometry (RBS) using 2.0 MeV $$^{4}$$He beam.

Journal Articles

An Intelligent catalyst

Tanaka, Hirohisa*; Uenishi, Mari*; Tan, Isao*; Kimura, Mareo*; Mizuki, Junichiro; Nishihata, Yasuo

SAE 2001 World Congress Paper; Advanced Catalytic Converters and Substrates for Gasoline Emission Systems (SP1573), p.1 - 8, 2001/00

The catalyst of the crystalline ceramics known as a perovskite-type oxide was designed and controlled at the atomic level in order to create a new function for self-regeneration of precious metals in a usage ambience without auxiliary treatment.

JAEA Reports

Removal of radionuclides from partitioning waste solutions by adsorption and catalytic oxidation methods

Yamagishi, Isao; Yamaguchi, Isoo; Kubota, Masumitsu*

JAERI-Research 2000-038, 40 Pages, 2000/09

JAERI-Research-2000-038.pdf:1.33MB

no abstracts in English

Journal Articles

Treatment of ion-exchange resins by fluidized bed incinerator equipped with copper oxide catalyst; Fundamental studies

*; Hirata, Masaru; Yahata, Taneaki

Journal of Nuclear Science and Technology, 28(3), p.228 - 238, 1991/03

no abstracts in English

Journal Articles

Incineration method for plutonium recovery from alpha-contaminated organic compounds

Inorg.Chim.Acta, 140, p.279 - 282, 1987/00

no abstracts in English

JAEA Reports

Design Study on Make-up and Purification System of the Helium Engineering Demonstration hoop; HENDEL

; Nekoya, Shinichi; ; ; ; ;

JAERI-M 8309, 73 Pages, 1979/07

JAERI-M-8309.pdf:1.56MB

no abstracts in English

Journal Articles

Low temperature fluorination of uranium oxide with engineering scale fluiduzed bed.

; ; ;

Nihon Genshiryoku Gakkai-Shi, 21(4), p.344 - 350, 1979/00

 Times Cited Count:2

no abstracts in English

Journal Articles

Catalitic effect of fission products on the low temperature fluorination of uranium oxide with elemental fluorine

;

Inorg.Nucl.Chem.Lett., 14(10), p.341 - 345, 1978/10

 Times Cited Count:3

no abstracts in English

Oral presentation

Increase in activity of hydrophobic platinum catalyst for oxidation of tritium by irradiation with electron beams

Iwai, Yasunori

no journal, , 

Hydrophobic platinum catalysts have been widely applied in the field of nuclear fusion such as to the exchange reactions of hydrogen isotopes between hydrogen and vapor and to the oxidation reactions of tritium. Hydrophobic platinum catalysts are hardly susceptible to water mist and water vapor. Hydrophobic platinum catalysts are produced by supporting platinum directly on hydrophobic polymer beads. For the hydrophobic polymer, styrene divinyl benzene (SDB) has been applied in Japan. It can be pointed out that the betterment in catalytic activity of hydrophobic catalyst is expected to downsize the catalytic reactor based on a hard look at a large increase in flow rate in future. The acute change in catalytic activity of two types of commercial Pt/SDB catalysts was found when they were irradiated with electron beams. After irradiation with electron beams, the catalytic activity was evaluated by means of overall reaction rate constant for the oxidation of tritium. The overall reaction rate constant increased as increase in dose. The constant showed the peak value in the dose between 500 to 1000 kGy. After the peak, the constant decreased as increase in dose. The overall reaction rate constant at the peak was 6 times larger than that evaluated with unirradiated. The mechanical strength of irradiated Pt/SDB kept sound until 1500 kGy. The irradiation is a promising method to the betterment in catalytic activity of Pt/SDB catalyst.

Oral presentation

Oral presentation

Dynamics of Water in Catalyst Layer of Fuel Cell by Quasi-elastic Neutron Scattering

Ito, Kanae; Yamada, Takeshi*; Shinohara, Akihiro*; Takata, Shinichi; Kawakita, Yukinobu

no journal, , 

18 (Records 1-18 displayed on this page)
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