| Presentation | 2017-12-28 Study of desorption process of nitrogen poisoning species generated during ammonia oxidation on the nanoparticles of platinum group metals by normal pulse voltammetry (1) Yuya Harada, Hidenobu Shiroishi, Morihiro Saito, Shinya Yamada, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | When the desorption mechanism of N poisoning (Nad) produced by ammonia oxidation was measured by normal pulse voltammetry, it was suspected that the accurate extraction of ammonia oxidation current was hindered by the change on solution resistance and electric double layer capacitance (EDLC) in the presence of ammonia. In this study, the effects of the coexistence of ammonia on the solution resistance and EDLC were investigated by electrochemical impedance measurements and cyclic voltammetry, and the kinetic analysis of the elimination process of the Nad was performed for an Ir/MWCNT catalyst using accurate ammonia oxidation current. It was clarified that the solution resistance decreases consistently with the concentration of ammonia. The amount of charge derived from EDLC, which was estimated by the integration of cyclic voltammogram in 0.1 M KOH-0.1 M NH3, was 47% as low as that in 0.1 M KOH. The result of normal pulse voltammetry indicated that the desorption of the Nad occurs within about one second when the potential below 0.4 V vs. RHE was applied, and that the amount of Nad desorption increased with decreasing applied potentials. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | ammonia fuel cell / nitrogen poisoning species / solution resistance / normal pulse voltammetry |
| Paper # | OME2017-50 |
| Date of Issue | 2017-12-21 (OME) |
| Conference Information | |
| Committee | OME |
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| Conference Date | 2017/12/28(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Kikai-Shinko-Kaikan Bldg. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | battery, electrochemistry, surface modification, catalyst, in situ obsrvation, capacitor |
| Chair | Tatsuo Mori(Aichi Inst. of Tech.) |
| Vice Chair | Yutaka Majima(Tokyo Inst. of Tech.) |
| Secretary | Yutaka Majima(NICT) |
| Assistant | Hirotake Kajii(Osaka Univ.) / Toshihiko Kaji(Tokyo Univ. of Agriculture and Tech.) |
| Paper Information | |
| Registration To | Technical Committee on Organic Molecular Electronics |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Study of desorption process of nitrogen poisoning species generated during ammonia oxidation on the nanoparticles of platinum group metals by normal pulse voltammetry (1) |
| Sub Title (in English) | |
| Keyword(1) | ammonia fuel cell |
| Keyword(2) | nitrogen poisoning species |
| Keyword(3) | solution resistance |
| Keyword(4) | normal pulse voltammetry |
| 1st Author's Name | Yuya Harada |
| 1st Author's Affiliation | National Institute of Technology, Tokyo College(NITTC) |
| 2nd Author's Name | Hidenobu Shiroishi |
| 2nd Author's Affiliation | National Institute of Technology, Tokyo College(NITTC) |
| 3rd Author's Name | Morihiro Saito |
| 3rd Author's Affiliation | Tokyo University of Agriculture and Technology(TUAT) |
| 4th Author's Name | Shinya Yamada |
| 4th Author's Affiliation | Tokyo University of Agriculture and Technology(TUAT) |
| Date | 2017-12-28 |
| Paper # | OME2017-50 |
| Volume (vol) | vol.117 |
| Number (no) | OME-376 |
| Page | pp.pp.7-10(OME), |
| #Pages | 4 |
| Date of Issue | 2017-12-21 (OME) |