【公開日：2025.06.10】【最終更新日：2025.05.16】
課題データ / Project Data
課題番号 / Project Issue Number
24AE0033
利用課題名 / Title
Investigating the alloying behavior of platinum-tin alloy on the alkaline-earth metal doped Al2O3 supports under the oxidative propane dehydrogenation in the presence of CO2.
利用した実施機関 / Support Institute
日本原子力研究開発機構 / JAEA
機関外・機関内の利用 / External or Internal Use
外部利用/External Use
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）革新的なエネルギー変換を可能とするマテリアル/Materials enabling innovative energy conversion（副 / Sub）-
キーワード / Keywords
Oxidative propane dehydrogenation, CO2, alkaline–earth metal, PtSn, alloy
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)
Yun Yongju
所属名 / Affiliation
Pohang University of Science and Technology
共同利用者氏名 / Names of Collaborators Excluding Supporters in the Hub and Spoke Institutes
I. Chung, J. Oh,J. An, S. Kim,H. Roh, C. Lim, O. Seo
ARIM実施機関支援担当者 / Names of Supporters in the Hub and Spoke Institutes
松村 大樹
利用形態 / Support Type
（主 / Main）共同研究/Joint Research（副 / Sub）-
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)
In this study, we systematically investigated the influence of alkaline-earth metals (Mg, Ca, Sr, and Ba) as promoters for PtSn/Al2O3 catalysts. Among the tested metals, Sr provided the most significant improvement in catalyst performance. XAS analysis showed that Sr effectively prevented the dealloying of the Pt–Sn alloy, thereby demonstrating high stability during reaction conditions. These findings highlight the unique stabilizing role of Sr in promoting catalyst stability under ODPC condition.
実験 / Experimental
In–situ XAS experiments were conducted on PtSn/Al2O3 and Sr-modified PtSn/Al2O3 catalysts. The experimental conditions employed for in–situ XAS measurements under H2 reduction and ODPC reaction conditions (C3H8+CO2) are illustrated in Figure 1.
結果と考察 / Results and Discussion
In–situ XAS measurements were performed on the Sr-modified PtSn/Al2O3 catalysts at Pt L3 and Sn K edge under H2 and ODPC reaction condition at reaction temperature. Under H2 reduction conditions, both catalysts exhibited the formation of the Pt–Sn alloy, which is a highly active species for the ODPC reaction. Under the reaction condition, Sr-modified catalysts retained PtSn alloy which formed during reduction. In contrast, the alloy in the unmodified catalyst decomposed into metallic Pt upon CO2 introduction. This suggests that Sr promotes CO2 activation, thereby stabilizing the alloy phase, enhancing catalytic activity and stability during ODPC conditions. Therefore, Sr emerges as a highly promising promoter for improving both catalyst activity and stability.
図・表・数式 / Figures, Tables and Equations
Figure 1. Temperature and gas conditions for in-situ XAS measurements on alkaline-earth modified PtSn/Al2O3 catalysts.
その他・特記事項（参考文献・謝辞等） / Remarks(References and Acknowledgements)
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) No. 2021R1A5A1084921.
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