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2 article(s) from Ozaki, Jun-ichi

Synthesis of P- and N-doped carbon catalysts for the oxygen reduction reaction via controlled phosphoric acid treatment of folic acid

Rieko Kobayashi,
Takafumi Ishii,
Yasuo Imashiro and
Jun-ichi Ozaki

Beilstein J. Nanotechnol. 2019, 10, 1497–1510, doi:10.3762/bjnano.10.148

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Figure 1: TEM images of the carbon materials. (a) H-1000, (b) P-1000, (c) HH-700, (d) PH700.

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Figure 2: Correlations between P/C atomic ratio and N/C atomic ratio of P-series precursors (open circles) an...

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Figure 3: N 1s spectra of (a) H-series and (b) P-series precursors. (c) P 2p spectra of P-series precursors. ...

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Figure 4: Correlations between (a) N/C ratios of HH-series carbon materials and those of H-series precursors,...

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Figure 5: N 1s spectra of (a) HH- and (b) PH-series carbon materials. (c) P 2p spectra of PH-series carbon ma...

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Figure 6: (a) Effect of CPAT temperature on the work function of PH-series carbon materials, (b) relationship...

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Figure 7: Results of ORR activity studies. (a) ORR voltammograms of HH- and PH-series carbon materials record...

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Figure 8: ORR voltammograms of two different PFA-derived carbon materials.

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Figure 9: Correlation of the ORR activity (represented by i_0.5) with (a) P2/C, (b) P3/C, and (c) (P2+P3)/C mo...

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Figure 10: The result of a single-cell test using PH-700 as the cathode catalyst. Current density (black solid...

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Full Research Paper

Published 25 Jul 2019

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Warped graphitic layers generated by oxidation of fullerene extraction residue and its oxygen reduction catalytic activity

Machiko Takigami,
Rieko Kobayashi,
Takafumi Ishii,
Yasuo Imashiro and
Jun-ichi Ozaki

Beilstein J. Nanotechnol. 2019, 10, 1391–1400, doi:10.3762/bjnano.10.137

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Figure 1: Comparison of transmission electron microscopy (TEM) images of prepared carbons. (a) Unmodified Nan...

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Figure 2: (a) Dependence of the carbon yield on the treatment time. (b) XRD profiles of the prepared carbons....

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Figure 3: (a) Treatment time dependence of the amount of oxygen-containing surface groups detected by the TPD...

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Figure 4: Dependence of the oxygen adsorption properties at −80 °C. (a) O₂ adsorption uptake measured using a...

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Figure 5: (a) Cyclic voltammograms of the samples for the redox reaction ferricyanide/ferrocyanide (potential...

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Figure 6: (a) Oxygen reduction reaction (ORR) voltammogram in 0.5 mol/L H₂SO₄ solution. (b) Dependence of spe...

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Full Research Paper

Published 12 Jul 2019

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