【公開日：2025.06.10】【最終更新日：2025.05.19】

課題データ / Project Data

課題番号 / Project Issue Number

24AE0002

利用課題名 / Title

Investigating the active species of M-doped Al₂O₃ supported Pt-Sn catalysts under oxidative propane dehydrogenation condition

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, PtSn alloy, XAS

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,Y. Kim,H. Roh,G. Youn,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

AE-006：エネルギー分散型XAFS装置

報告書データ / Report

概要（目的・用途・実施内容）/ Abstract (Aim, Use Applications and Contents)

Based on our preliminary results, an incorporation of Ca onto PtSn/Al₂O­₃ catalyst enhanced catalytic activity and stability in CO₂-assisted oxidative dehydrogenation of propane (ODPC). It was expected that Pt-Sn alloy was active species for ODPC, exhibiting a highly active nature for propane activation. However, introduction of CO₂ as oxidant could segregate the Pt-Sn alloy by oxidizing Sn to Sn oxides. Therefore, XAS measurements under H₂, CO₂, and reaction condition were required to reveal the behavior of Pt-Sn alloy by comparing the oxidation state and local coordination nature of Pt and Sn under various gas condition at reaction temperature.

実験 / Experimental

The experimental conditions of in-situ XAS experiment for the Ca-PtSn/Al₂O­₃ and PtSn/Al₂O­₃ catalysts are described in Figure 1. The main focus of the in-situ XAS experiments was investigation of Pt-Sn alloy behavior under H₂, CO₂, and reaction condition at reaction temperature.

結果と考察 / Results and Discussion

The in-situ XAS measurements for Ca-PtSn/Al₂O₃ and PtSn/Al₂O­₃ catalysts at Pt L₃ and Sn K edges under H₂ reduction, CO₂ oxidation, and reaction condition (C₃H₈+CO₂) at reaction temperature (550 ℃). The Pt and Sn formed Pt-Sn alloy under H₂ reduction, whereas the formed Pt-Sn alloy was dealloyed under CO₂ oxidation for both catalysts. Under the reaction condition, Ca-PtSn/Al₂O­₃ exhibited similar Pt-Sn alloy behavior with H₂ reduction, while PtSn/Al₂O­₃ catalyst showed Pt-Sn alloy behavior similar with metallic Pt, not with that with H₂ reduction. These results revealed that the incorporation of Ca onto PtSn/Al₂O­₃ catalyst promoted an inhibition of dealloying of the Pt-Sn alloy under the reaction condition, which led to more active and stable catalytic activity.

図・表・数式 / Figures, Tables and Equations

Figure 1. Temperature and gas conditions for in-situ XAS measurement for Ca-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.

1. (1) I. Chung, J. An, and Y. Yun, 2024 KSIEC Spring meeting, 2024/05/09
2. (2) J. An, I. Chung and Y. Yun, 2024 KIChE Fall Meeting and International Symposium, 2024/10/16

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