WEKO3
アイテム
The suppression of oxidative corrosion of carbon by structural change due to ion irradiation
https://repo.qst.go.jp/records/82598
https://repo.qst.go.jp/records/82598ca5b79e9-5b05-4c47-aef2-e1295c247362
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2021-04-02 | |||||
| タイトル | ||||||
| タイトル | The suppression of oxidative corrosion of carbon by structural change due to ion irradiation | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_c94f | |||||
| 資源タイプ | conference object | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Hiroyuki, Okazaki
× Hiroyuki, Okazaki× Shunya, Yamamoto× Hiroshi, Koshikawa× Tomitsugu, Taguchi× Akira, Idesaki× Tetsuya, Yamaki× Hiroyuki, Okazaki× Shunya, Yamamoto× Hiroshi, Koshikawa× Tomitsugu, Taguchi× Akira, Idesaki× Tetsuya, Yamaki |
|||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The glassy carbon (GC) has been widely used as an electrode in the field of electrochemistry. Since the carbon corrosion is inevitable because of the carbon oxidization caused by applying voltage in an electrolyte, the GC without the oxidative corrosion has been required. The previous study reported that the ion irradiation into GC leads to more electrochemically stable carbon and the structural change to amorphous carbon. However, it has not been understood the relationship between the microstructure caused by the ion irradiation and its oxidative corrosion. In this study, we have discovered that the ion irradiation at a certain fluence leads to the suppression of corrosion with accompanying the orientation along c-axis. The polished GC substrates were irradiated with 380 keV Ar+ at fluence between 1.0×10^14 and 1.0×10^16 ions/cm^2 at TIARA. We estimated the durability for the corrosion by cyclic voltammetry (CV) before and after the accelerated durability test repeating potential cycling between 1.0 and 1.5 V. From the fluence dependence of CV curves before and after the accelerated durability test for pristine and irradiated GC substrates, we compared the curves before and after. The magnitude of the current in the CV curve for the irradiation below 1.0×10^15 ions/cm^2 increases after the durability test, indicating the electrochemical oxidation of the GC. For the fluence above 7.5×10^15 ions/cm^2, we observed small change in the CV curve after the durability test. We additionally observed slight orientation along c-axis and then the densification at the fluence above 7.5×10^15 ions/cm^2 although amorphous and almost unchanged in the density for 1.0×10^15 ions/cm^2 from TEM and EELS results. These results suggest that the oxidative corrosion was suppressed by the formation of chemically stable surface consisting of c-plane of graphite. |
|||||
| 会議概要（会議名, 開催地, 会期, 主催者等） | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 第30回日本MRS年次大会 | |||||
| 発表年月日 | ||||||
| 日付 | 2020-12-10 | |||||
| 日付タイプ | Issued | |||||
