【公開日：2024.07.25】【最終更新日：2024.06.26】
課題データ / Project Data
課題番号 / Project Issue Number
23AE0022
利用課題名 / Title
In-situ XAFS study of highly active GaPtB catalysts under propane dehydrogenation conditions
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
XAFS, Propane dehydrogenation, GaPtB
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 in Other Institutes Than Hub and Spoke Institutes
J. Oh,S. Kim,M.-G. Jang,T. Kim,O. Seo
ARIM実施機関支援担当者 / Names of Collaborators 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 our previous work, we successfully developed a four-component GaPtBZr/Al2O3 catalyst for PDH reaction using an ML model combined with a metaheuristic optimization algorithm (currently under revision). These experiments confirmed the synergistic effect of elements Ga, Pt, B, and Zr. Despite the excellent performance observed, the analysis of four-component catalysts poses significant challenges when attempting to determine the cause using conventional lab-scale analysis. Therefore, in-situ XAFS measurement techniques are an excellent probe to examine the electronic behavior and interaction between each element of catalysts containing Ga, Pt, and B (excluding Zr, which has a minor effect among the four elements).
実験 / Experimental
Figure 1 shows the in-situ XAFS experimental process of the GaPtB-x catalysts under pretreatment conditions. The objective of this beamtime is to investigate variation in the oxidation state and alloy formation of the GaPtB-x under pretreatment conditions.
結果と考察 / Results and Discussion
We were performed the in-situ XAFS measurements of Ga and Pt catalysts supported on the Al2O3 at Pt L3 and Ga K edges in oxidation and reduction conditions at 600 °C. The Pt and Ga formed an alloy under reduction conditions, while the excess Ga retained nanoparticles in the form of GaOx. Under oxidation conditions, Ga and Pt were present as nanoparticles, respectively, forming multi-active species for PDH. The introduction of B increased the amount of metallic state Pt, which exhibits high PDH performance.
図・表・数式 / Figures, Tables and Equations
Figure 1. In-situ XAFS measurements of the GaPtB-x 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. 2022R1A2C4001411.
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.
- We are planning to submit the research article, after analyzing the in-situ C3H8-DRIFT measurements, TEM observation, and NH3-TPD.
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