CeO2系の二段階水分解反応におけるレーザ表面粗面化の効果検証

カテゴリ: 論文誌(論文単位)

グループ名: 【A】基礎・材料・共通部門

発行日: 2017/05/01

タイトル(英語): Preliminary Study on the Effect of Surface Roughening due to Laser Irradiation in Two-step Thermochemical Water-splitting with CeO2 System

著者名: 王　明炎（大阪産業大学工学部），長村　翔太（宮崎大学工学部環境・エネルギー工学研究センター），飯田　裕之（大阪産業大学工学部），金子　宏（宮崎大学工学部環境・エネルギー工学研究センター），草場　光博（大阪産業大学工学部），部谷　学（大阪産業大学工学部）

著者名(英語): Wang Mingyan (Faculty of Engineering, Osaka Sangyo University), Shota Osamura (Research Center for Sustainable Energy & Environmental Engineering, Faculty of Engineering, University of Miyazaki), Hiroyuki Iida (Faculty of Engineering, Osaka Sangyo University), Hiroshi Kaneko (Research Center for Sustainable Energy & Environmental Engineering, Faculty of Engineering, University of Miyazaki), Mitsuhiro Kusaba (Faculty of Engineering, Osaka Sangyo University), Manabu Heya (Faculty of Engineering, Osaka Sangyo University)

キーワード: 酸化セリウム，ナノ秒パルスレーザ，CWレーザ，表面粗面化，反応面積増大　　cerium oxide，nano-second pulsed-laser，continuous-wave laser，surface roughening，increase in reaction area

要約(英語): In order to investigate the effect of surface roughening due to laser irradiation in two-step thermochemical water-splitting with CeO2 system, we irradiated reactive ceramics of CeO2-NiO system and formed groove-like structures on the surface of these samples using the two types of lasers, such as a CW laser (λ=1070nm) and a nanosecond (Ns) pulsed-laser (λ=532nm). We observed structural and characteristic changes after laser irradiation and thermochemical cycling, and estimated the amount of the syngas (H2 and O2 gases) during thermochemical cycling. The following findings can be derived from the experimental results. (1) The surface of the samples irradiated by a CW laser became much smoother and its color changed from milky white to blue, while the sample surface after Ns pulsed-laser irradiation was almost the same as that before laser irradiation. (2) Glass-like material was observed on the surface of the sample after thermochemical cycling, and groove-like structures partly changed into melted-like structures. (3) The amount of the syngas from the all of the irradiated samples was markedly higher than that from the unirradiated samples only at the early stage of thermochemical cycling. This reduction after a few cycles would result from the sintering of CeO2 samples under high temperature and from the separation of inorganic adhesive used as a binder. (4) Even though with lower surface area, the samples by Ns pulsed-laser irradiation emitted more H2 gas than those of other samples, because they have no a melted-like and smooth surface.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.137 No.5 （2017） 特集：革新的な光応用技術

本誌掲載ページ: 246-252 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejfms/137/5/137_246/_article/-char/ja/