【公開日：2025.06.10】【最終更新日：2025.05.06】
課題データ / Project Data
課題番号 / Project Issue Number
24OS0051
利用課題名 / Title
コーク燃焼に有効なHEI触媒の粒子観察と元素分析
利用した実施機関 / Support Institute
大阪大学 / Osaka Univ.
機関外・機関内の利用 / External or Internal Use
内部利用（ARIM事業参画者以外）/Internal Use (by non ARIM members)
技術領域 / Technology Area
【横断技術領域 / Cross-Technology Area】（主 / Main）計測・分析/Advanced Characterization（副 / Sub）-
【重要技術領域 / Important Technology Area】（主 / Main）マルチマテリアル化技術・次世代高分子マテリアル/Multi-material technologies / Next-generation high-molecular materials（副 / Sub）-
キーワード / Keywords
ハイエントロピー材料/ High entropy material,電子顕微鏡/ Electronic microscope
利用者と利用形態 / User and Support Type
利用者名（課題申請者）/ User Name (Project Applicant)
古川 森也
所属名 / Affiliation
大阪大学 工学研究科
共同利用者氏名 / Names of Collaborators Excluding Supporters in the Hub and Spoke Institutes
李 端行
ARIM実施機関支援担当者 / Names of Supporters in the Hub and Spoke Institutes
利用形態 / Support Type
（主 / Main）機器利用/Equipment Utilization（副 / Sub）,技術補助/Technical Assistance
利用した主な設備 / Equipment Used in This Project
報告書データ / Report
概要（目的・用途・実施内容）/ Abstract (Aim, Use Applications and Contents)
The purpose of this experiment was to characterize the structural and compositional features of a high-entropy intermetallic catalyst, specifically Pt₁.₀Co₁.₂Ni₀.₈Sn₁.₇In₁.₃ supported on CeO₂. TEM analysis was conducted to confirm the morphology of the supported catalyst, measure the particle size distribution, and perform EDS mapping for elemental composition verification.
実験 / Experimental
Approximately 5 mg of the catalyst powder was first ground thoroughly for 5–10 minutes to ensure homogeneity. A small, undetermined fraction of the ground sample was then dispersed in approximately 2 mL of high-purity ethanol. The suspension was ultrasonicated until the catalyst particles were fully dispersed. Using a pipette, one drop of the suspension was deposited onto a carbon-coated copper grid, allowing the ethanol to evaporate naturally. This drop-casting process was repeated three times, with sufficient drying between each application. The prepared grid was then left to air-dry overnight and stored until TEM analysis was performed.
結果と考察 / Results and Discussion
TEM images showed that the catalyst particles were uniformly dispersed on the CeO₂ support, with approximately 4–5 metal alloy nanoparticles attached to each larger CeO₂ grain. The average particle size of the metallic phase was estimated to be ~1.5 nm, with a distribution ranging from 0.8 to 2.3 nm. These results confirm the supported nature of the catalyst. EDS analysis detected the presence of all five target elements (Pt, Co, Ni, Sn, and In), and the measured elemental ratios were generally consistent with the intended composition. However, due to limitations in spatial resolution and the nanoscale size of the particles, the mapping data were insufficient to evaluate the uniformity of elemental distribution. As a result, while the catalyst exhibits the expected morphology and elemental presence, the current analysis is not sufficient to confirm the formation of a high-entropy alloy phase.
図・表・数式 / Figures, Tables and Equations
その他・特記事項（参考文献・謝辞等） / Remarks(References and Acknowledgements)
成果発表・成果利用 / Publication and Patents
論文・プロシーディング（DOIのあるもの） / DOI (Publication and Proceedings)
口頭発表、ポスター発表および、その他の論文 / Oral Presentations etc.
特許 / Patents
特許出願件数 / Number of Patent Applications：0件
特許登録件数 / Number of Registered Patents：0件