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Yasuda, Satoshi; Uchibori, Yosuke*; Wakeshima, Makoto*; Hinatsu, Yukio*; Ogawa, Hiroaki; Yano, Masahiro; Asaoka, Hidehito
RSC Advances (Internet), 8(66), p.37600 - 37605, 2018/11
Times Cited Count:10 Percentile:40.35(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.
Doi, Yoshihiro*; Suzuki, Ryo*; Hinatsu, Yukio*; Kodama, Katsuaki; Igawa, Naoki
Inorganic Chemistry, 54(22), p.10725 - 10731, 2015/11
Times Cited Count:7 Percentile:35.71(Chemistry, Inorganic & Nuclear)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
Nakamura, Akio; Igawa, Naoki; Okamoto, Yoshihiro; Wang, J.*; Hinatsu, Yukio*; Takahashi, Masashi*; Takeda, Masuo*
Hyperfine Interactions, 217(1-3), p.17 - 26, 2013/04
Times Cited Count:1 Percentile:52.92Nakamura, Akio; Masaki, Nobuyuki; Otobe, Haruyoshi; Hinatsu, Yukio*; Wang, J.*; Takeda, Masuo*
Pure and Applied Chemistry, 79(10), p.1691 - 1729, 2007/10
Times Cited Count:14 Percentile:47.17(Chemistry, Multidisciplinary)no abstracts in English
Masaki, Nobuyuki; Nakamura, Akio; Furuuchi, Fumihito*; Hinatsu, Yukio*
Journal of Physics and Chemistry of Solids, 66(2-4), p.312 - 317, 2005/02
Times Cited Count:10 Percentile:42.78(Chemistry, Multidisciplinary)no abstracts in English
Mizumaki, Masaichiro*; Yoshii, Kenji; Hinatsu, Yukio*; Doi, Yoshihiro*; Uruga, Tomoya*
Physica Scripta, T115, p.513 - 515, 2005/00
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 ( = Ba, Sr)LnRuO and ( = Ca, Ba, Sr)RuO was 4+. The valence of Ru in LnRuO was 5+. The valence of Ru in PbRuO 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.
Wakeshima, Makoto*; Ino, Kentaro*; Hinatsu, Yukio*; Ishii, Yoshinobu
Bulletin of the Chemical Society of Japan, 76(8), p.1519 - 1525, 2003/08
Times Cited Count:2 Percentile:13.38(Chemistry, Multidisciplinary)no abstracts in English
Wakeshima, Makoto*; Taira, Nobuyuki*; Hinatsu, Yukio*; Ishii, Yoshinobu
Solid State Communications, 125(6), p.311 - 315, 2003/02
Times Cited Count:25 Percentile:73.74(Physics, Condensed Matter)no abstracts in English
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
no abstracts in English
Izumiyama, Yuki*; Doi, Yoshihiro*; Wakeshima, Makoto*; Hinatsu, Yukio*; Nakamura, Akio; Ishii, Yoshinobu
Journal of Solid State Chemistry, 169(1), p.125 - 130, 2002/11
Times Cited Count:40 Percentile:81.19(Chemistry, Inorganic & Nuclear)no abstracts in English
Harada, Daijitsu*; Hinatsu, Yukio*; Masaki, Nobuyuki; Nakamura, Akio
Journal of the American Ceramic Society, 85(3), p.647 - 652, 2002/03
no abstracts in English
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
*; *; Hinatsu, Yukio*; Shimojo, Yutaka; Morii, Yukio
Journal of Solid State Chemistry, 145(2), p.705 - 710, 1999/00
Times Cited Count:27 Percentile:73.04(Chemistry, Inorganic & Nuclear)no abstracts in English
Hinatsu, Yukio*; Shimojo, Yutaka; Morii, Yukio
Journal of Alloys and Compounds, 270, p.127 - 131, 1998/00
Times Cited Count:9 Percentile:55.14(Chemistry, Physical)no abstracts in English
*; Hinatsu, Yukio*; ; Saeki, Masakatsu
Journal of Solid State Chemistry, 138(2), p.342 - 346, 1998/00
Times Cited Count:16 Percentile:55.34(Chemistry, Inorganic & Nuclear)no abstracts in English
*; Hinatsu, Yukio*; Nakamura, Akio; Inami, Toshiya; Shimojo, Yutaka; Morii, Yukio
Journal of Solid State Chemistry, 141, p.404 - 410, 1998/00
Times Cited Count:86 Percentile:96.32(Chemistry, Inorganic & Nuclear)no abstracts in English
Hinatsu, Yukio
Journal of Alloys and Compounds, 218, p.58 - 63, 1995/00
Times Cited Count:2 Percentile:31.27(Chemistry, Physical)no abstracts in English
Hinatsu, Yukio
Journal of Solid State Chemistry, 114, p.595 - 597, 1995/00
Times Cited Count:7 Percentile:35.81(Chemistry, Inorganic & Nuclear)no abstracts in English
Hinatsu, Yukio
Journal of Solid State Chemistry, 119, p.405 - 411, 1995/00
Times Cited Count:11 Percentile:48.35(Chemistry, Inorganic & Nuclear)no abstracts in English