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In Situ Time-Resolved XAFS Studies on Laser-Induced Particle Formation of Palladium Metal in an Aqueous / EtOH Solution
https://repo.qst.go.jp/records/49514
https://repo.qst.go.jp/records/495141abdd28d-b885-4f57-b7aa-d87222e7fca6
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2019-01-28 | |||||
| タイトル | ||||||
| タイトル | In Situ Time-Resolved XAFS Studies on Laser-Induced Particle Formation of Palladium Metal in an Aqueous / EtOH Solution | |||||
| 言語 | ||||||
| 言語 | jpn | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| 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 |
佐伯, 盛久
× 佐伯, 盛久× 松村, 大樹× 蓬田, 匠× 田口, 富嗣× 辻, 卓也× 齋藤, 寛之× 大場, 弘則× 佐伯 盛久× 田口 富嗣× 齋藤 寛之× 大場 弘則 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The reaction kinetics of laser-induced particle formation in an aqueous / EtOH solution of PdCl42- without a photoactivator was investigated by transmission electron microscopy (TEM) and dispersive X-ray absorption fine structure (DXAFS) measurements. Pd particles were generated by the irradiation of a nanosecond pulsed 266-nm laser with a fluence of 19.9–59.7 mJ/cm2. The TEM observation showed the dependence of the particle size on the laser fluence and the promotion of particle growth by the irradiation of a high-fluence laser. The DXAFS data were analyzed by three methods: deconvolution of the XANES spectrum by a linear combination fitting, model fitting of the EXAFS oscillation of the PdCl42- ion, and fitting of the spectrum edge of XANES using an error function. These methods give the ratio of the Pd2+, the coordination number of Pd¬–Cl bond, and the edge width of XANES, which are related to the Pd2+ concentration. Temporal changes of the Pd2+ concentration obtained by these three methods were analyzed based on the Finke-Watzky two-step mechanism. The analysis elucidates that, in laser-induced particle formation in the absence of a photoactivator, the photons contribute to reduction of the PdCl42- ion by the one-photon process and to the autocatalytic growth of Pd particles by the multi-photon process. | |||||
| 書誌情報 |
Journal of Physical Chemistry C 巻 123, 号 1, p. 817-824, 発行日 2019-01 |
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| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1021/acs.jpcc.8b09532 | |||||
