JOPSS - Search Results

Journal Articles

Enhancement of Fe-N-C carbon catalyst activity for the oxygen reduction reaction; Effective increment of active sites by a short and repeated heating process

Yasuda, Satoshi; Uchibori, Yosuke*; Wakeshima, Makoto*; Hinatsu, Yukio*; Ogawa, Hiroaki; Yano, Masahiro; Asaoka, Hidehito

RSC Advances (Internet), 8(66), p.37600 - 37605, 2018/11

https://doi.org/10.1039/C8RA08359B

Times Cited Count：13 Percentile：38.53(Chemistry, Multidisciplinary)

We present a quantitative study on the effect of a newly obtained thermal history on the formation of Fe-N-C catalytic sites. A short and repeated heating process is employed as the new thermal history, where short heating (1 min) followed by quenching is applied to a sample with arbitrary repetition. Through electrochemical quantitative analysis, it is found that the new process effectively increases the Fe-N-C mass-based site density (MSD) to almost twice that achieved using a conventional continuous heating process, while the turn-over frequency (TOF) is independent of the process. Elemental analysis shows that the new process effectively suppresses the thermal desorption of Fe and N atoms during the initial formation stage and consequently contributes to an increase in the Fe-N-C site density. The resultant catalytic activity (gravimetric kinetic current density (0.8 V vs. RHE)) is 1.8 times higher than that achieved with the continuous heating process.

Journal Articles

Crystal structures and magnetic properties of nickel chain compounds PbMNiTeO $_{18}$ (M = Mn, Cd)

Doi, Yoshihiro*; Suzuki, Ryo*; Hinatsu, Yukio*; Kodama, Katsuaki; Igawa, Naoki

Inorganic Chemistry, 54(22), p.10725 - 10731, 2015/11

https://doi.org/10.1021/acs.inorgchem.5b01619

Times Cited Count：10 Percentile：43.35(Chemistry, Inorganic & Nuclear)

Journal Articles

Lanthanides ( $^{151}$ Eu and $^{155}$ Gd)-Mssbauer spectroscopic study of defect-fluorite oxides coupled with new defect crystal chemistry model

Nakamura, Akio; Igawa, Naoki; Okamoto, Yoshihiro; Hinatsu, Yukio*; Wang, J.*; Takahashi, Masashi*; Takeda, Masuo*

Mssbauer Spectroscopy; Applications in Chemistry, Biology, and Nanotechnology, p.71 - 94, 2013/10

https://doi.org/10.1002/9781118714614.ch04

Journal Articles

Defect-fluorite oxides; Ln (Eu and Gd) Mssbauer study coupled with new defect-crystal-chemistry model

Nakamura, Akio; Igawa, Naoki; Okamoto, Yoshihiro; Wang, J.*; Hinatsu, Yukio*; Takahashi, Masashi*; Takeda, Masuo*

Hyperfine Interactions, 217(1-3), p.17 - 26, 2013/04

https://doi.org/10.1007/s10751-012-0654-z

Times Cited Count：1 Percentile：51.22(Physics, Atomic, Molecular & Chemical)

Journal Articles

Defect-fluorite oxides M $_{1-y}$ Ln $_{y}$ O $_{2-y/2}$ (Ln = lanthanide; M = Hf, Zr, Ce, U, Th); Structure, property, and applications

Nakamura, Akio; Masaki, Nobuyuki; Otobe, Haruyoshi; Hinatsu, Yukio*; Wang, J.*; Takeda, Masuo*

Pure and Applied Chemistry, 79(10), p.1691 - 1729, 2007/10

https://doi.org/10.1351/pac200779101691

Times Cited Count：14 Percentile：46.20(Chemistry, Multidisciplinary)

no abstracts in English

Journal Articles

$^{151}$ Eu-Mssbauer spectroscopic and X-ray diffraction study of the Eu $_{2}$ (Ce $_{1-x}$ Zr $_{x}$ ) $_{2}$ O $_{7}$ and LnEuZr $_{2}$ O $_{7}$ (Ln=lanthanide) systems

Masaki, Nobuyuki; Nakamura, Akio; Furuuchi, Fumihito*; Hinatsu, Yukio*

Journal of Physics and Chemistry of Solids, 66(2-4), p.312 - 317, 2005/02

https://doi.org/10.1016/j.jpcs.2004.07.017

Times Cited Count：10 Percentile：41.42(Chemistry, Multidisciplinary)

no abstracts in English

Journal Articles

Investigation of structural and electronic properties in Ru perovskite oxides by XAFS measurements

Mizumaki, Masaichiro*; Yoshii, Kenji; Hinatsu, Yukio*; Doi, Yoshihiro*; Uruga, Tomoya*

Physica Scripta, T115, p.513 - 515, 2005/00

https://dx.doi.org/10.1238/Physica.Topical.115a00513

The electronic and structural properties of Ru oxides were investigated by utilizing X-ray absorption spectroscopy (XAS). We estimate the valence of Ru in perovskite ruthenium oxides by XAS measurements. XAS measurements were carried out at room temperature around Ru K-edge. The valence of Ru in $_{2}$ ( = Ba, Sr)LnRuO $_{6}$ and ( = Ca, Ba, Sr)RuO $_{3}$ was 4+. The valence of Ru in Ln $_{3}$ RuO $_{7}$ was 5+. The valence of Ru in PbRuO $_{3}$ showed an intermediate value between 4+ and 5+. Theoretical calculation reproduced the experimental spectra. We analyzed XAS spectra and obtained information of local structure. The bond length between Ru and O was consistent with the results of neutron diffraction.

Journal Articles

Magnetic studies on quaternary iron sulfides BaLnFeS(Ln=Ce,Pr,Nd,Sm) by magnetic susceptibility, specific heat, $^{57}$ Fe mssbauer spectrum, and neutron diffraction measurements

Wakeshima, Makoto*; Ino, Kentaro*; Hinatsu, Yukio*; Ishii, Yoshinobu

Bulletin of the Chemical Society of Japan, 76(8), p.1519 - 1525, 2003/08

https://doi.org/10.1246/bcsj.76.1519

Times Cited Count：2 Percentile：13.08(Chemistry, Multidisciplinary)

no abstracts in English

Journal Articles

Electrical and magnetic properties of pseudo-one-dimensional calcium iridium oxide Ca $_{5}$ Ir $_{3}$ O $_{12}$

Wakeshima, Makoto*; Taira, Nobuyuki*; Hinatsu, Yukio*; Ishii, Yoshinobu

Solid State Communications, 125(6), p.311 - 315, 2003/02

https://doi.org/10.1016/S0038-1098(02)00823-2

Times Cited Count：29 Percentile：75.28(Physics, Condensed Matter)

no abstracts in English

Journal Articles

$^{151}$ Eu Mssbauer spectroscopic study on the Eu $_{y}$ M $_{1-y}$ O $_{2-y}$ (0y1.0)(M=Th, U)

Masaki, Nobuyuki; Otobe, Haruyoshi; Nakamura, Akio; Harada, Daijitsu*; Ito, Kentaro*; Sasaki, Yoshinobu*; Hinatsu, Yukio*

Journal of Nuclear Science and Technology, 39(Suppl.3), p.217 - 220, 2002/11

http://www.tandfonline.com/doi/abs/10.1080/00223131.2002.10875448

no abstracts in English

Journal Articles

Magnetic and calorimetric studies on ordered perovskite Ba $_{2}$ ErRuO $_{6}$

Izumiyama, Yuki*; Doi, Yoshihiro*; Wakeshima, Makoto*; Hinatsu, Yukio*; Nakamura, Akio; Ishii, Yoshinobu

Journal of Solid State Chemistry, 169(1), p.125 - 130, 2002/11

https://doi.org/10.1016/S0022-4596(02)00041-5

Times Cited Count：42 Percentile：81.78(Chemistry, Inorganic & Nuclear)

no abstracts in English

Journal Articles

X-ray diffraction and $^{151}$ Eu-Mssbauer spectroscopic study of the Hf $_{1-x}$ Eu $_{x}$ O( $_{2-x/2}$ )(0x1.0) system

Harada, Daijitsu*; Hinatsu, Yukio*; Masaki, Nobuyuki; Nakamura, Akio

Journal of the American Ceramic Society, 85(3), p.647 - 652, 2002/03

https://doi.org/10.1111/j.1151-2916.2002.tb00145.x

no abstracts in English

Journal Articles

$^{151}$ Eu-Mssbauer spectroscopic study of the fluorite-type oxide solid solutions, Eu $_{y}$ M $_{1-y}$ O $_{2-y/2}$ (M=Zr,Ce)(0y1.0)

Masaki, Nobuyuki; Guillermo, N. R. D.; Otobe, Haruyoshi; Nakamura, Akio; Izumiyama, Yuki*; Hinatsu, Yukio*

Advances in Science and Technology, 29, p.1233 - 1240, 2000/00

no abstracts in English

Journal Articles

Crystal structures and magnetic properties of Ca $_{2-x}$ Sr $_{x}$ MnO $_{4}$

; ; Hinatsu, Yukio*; Shimojo, Yutaka; Morii, Yukio

Journal of Solid State Chemistry, 145(2), p.705 - 710, 1999/00

https://doi.org/10.1006/jssc.1999.8290

Times Cited Count：30 Percentile：73.21(Chemistry, Inorganic & Nuclear)

no abstracts in English

Journal Articles

Magnetic and neutron diffraction studies on potassium uranate KUO $_{3}$

Hinatsu, Yukio*; Shimojo, Yutaka; Morii, Yukio

Journal of Alloys and Compounds, 270, p.127 - 131, 1998/00

https://doi.org/10.1016/S0925-8388(98)00467-8

Times Cited Count：9 Percentile：54.16(Chemistry, Physical)

no abstracts in English

Journal Articles

Magnetic and neutron diffraction study on perovskites La $_{1-x}$ Sr $_{x}$ CrO $_{3}$

; Hinatsu, Yukio*; Nakamura, Akio; Inami, Toshiya; Shimojo, Yutaka; Morii, Yukio

Journal of Solid State Chemistry, 141, p.404 - 410, 1998/00

https://doi.org/10.1006/jssc.1998.7961

Times Cited Count：90 Percentile：96.30(Chemistry, Inorganic & Nuclear)

no abstracts in English

Journal Articles

Magnetic properties of layered perovskites NaLnTiO $_{4}$ (Ln=Sm,Eu,and Gd)

; Hinatsu, Yukio*; ; Saeki, Masakatsu

Journal of Solid State Chemistry, 138(2), p.342 - 346, 1998/00

https://doi.org/10.1006/jssc.1998.7794

Times Cited Count：17 Percentile：56.58(Chemistry, Inorganic & Nuclear)

no abstracts in English

Journal Articles

Magnetic properties of ordered perovskite oxide Ba $_{3}$ ZnU $_{2}$ O $_{9}$

Hinatsu, Yukio

Journal of Alloys and Compounds, 218, p.58 - 63, 1995/00

https://doi.org/10.1016/0925-8388(94)01365-9

Times Cited Count：2 Percentile：30.82(Chemistry, Physical)

no abstracts in English

Journal Articles

Magnetic properties of (Cr $_{1-x}$ Fe $_{x}$ ) $_{3}$ Te $_{4}$

Hinatsu, Yukio; ; Ishida, Kazushige*

Journal of Solid State Chemistry, 120, p.49 - 53, 1995/00

https://doi.org/10.1006/jssc.1995.1374

Times Cited Count：9 Percentile：39.26(Chemistry, Inorganic & Nuclear)

no abstracts in English

Journal Articles

Magnetic properties of tetravalent praseodymium perovskites BaPrO $_{3}$ , BaCe $_{y}$ Pr $_{1-y}$ O $_{3}$ , and Sr $_{y}$ Ba $_{1-y}$ PrO $_{3}$

Hinatsu, Yukio

Journal of Solid State Chemistry, 119, p.405 - 411, 1995/00

https://doi.org/10.1016/0022-4596(95)80059-X

Times Cited Count：13 Percentile：50.50(Chemistry, Inorganic & Nuclear)

no abstracts in English

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Enhancement of Fe-N-C carbon catalyst activity for the oxygen reduction reaction; Effective increment of active sites by a short and repeated heating process

Crystal structures and magnetic properties of nickel chain compounds PbMNiTeO $_{18}$ (M = Mn, Cd)

Lanthanides ( $^{151}$ Eu and $^{155}$ Gd)-Mssbauer spectroscopic study of defect-fluorite oxides coupled with new defect crystal chemistry model

Defect-fluorite oxides; Ln (Eu and Gd) Mssbauer study coupled with new defect-crystal-chemistry model

Defect-fluorite oxides M $_{1-y}$ Ln $_{y}$ O $_{2-y/2}$ (Ln = lanthanide; M = Hf, Zr, Ce, U, Th); Structure, property, and applications

$^{151}$ Eu-Mssbauer spectroscopic and X-ray diffraction study of the Eu $_{2}$ (Ce $_{1-x}$ Zr $_{x}$ ) $_{2}$ O $_{7}$ and LnEuZr $_{2}$ O $_{7}$ (Ln=lanthanide) systems

Investigation of structural and electronic properties in Ru perovskite oxides by XAFS measurements

Magnetic studies on quaternary iron sulfides BaLnFeS(Ln=Ce,Pr,Nd,Sm) by magnetic susceptibility, specific heat, $^{57}$ Fe mssbauer spectrum, and neutron diffraction measurements

Electrical and magnetic properties of pseudo-one-dimensional calcium iridium oxide Ca $_{5}$ Ir $_{3}$ O $_{12}$

$^{151}$ Eu Mssbauer spectroscopic study on the Eu $_{y}$ M $_{1-y}$ O $_{2-y}$ (0y1.0)(M=Th, U)

Magnetic and calorimetric studies on ordered perovskite Ba $_{2}$ ErRuO $_{6}$

X-ray diffraction and $^{151}$ Eu-Mssbauer spectroscopic study of the Hf $_{1-x}$ Eu $_{x}$ O( $_{2-x/2}$ )(0x1.0) system

$^{151}$ Eu-Mssbauer spectroscopic study of the fluorite-type oxide solid solutions, Eu $_{y}$ M $_{1-y}$ O $_{2-y/2}$ (M=Zr,Ce)(0y1.0)

Crystal structures and magnetic properties of Ca $_{2-x}$ Sr $_{x}$ MnO $_{4}$

Magnetic and neutron diffraction studies on potassium uranate KUO $_{3}$

Magnetic and neutron diffraction study on perovskites La $_{1-x}$ Sr $_{x}$ CrO $_{3}$

Magnetic properties of layered perovskites NaLnTiO $_{4}$ (Ln=Sm,Eu,and Gd)

Magnetic properties of ordered perovskite oxide Ba $_{3}$ ZnU $_{2}$ O $_{9}$

Magnetic properties of (Cr $_{1-x}$ Fe $_{x}$ ) $_{3}$ Te $_{4}$

Magnetic properties of tetravalent praseodymium perovskites BaPrO $_{3}$ , BaCe $_{y}$ Pr $_{1-y}$ O $_{3}$ , and Sr $_{y}$ Ba $_{1-y}$ PrO $_{3}$