【公開日：2024.07.25】【最終更新日：2024.06.17】
課題データ / Project Data
課題番号 / Project Issue Number
23UT0029
利用課題名 / Title
Development of novel catalytic materials of metal nanoparticles and polyoxometalates
利用した実施機関 / Support Institute
東京大学 / Tokyo 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）次世代ナノスケールマテリアル/Next-generation nanoscale materials（副 / Sub）-
キーワード / Keywords
電子顕微鏡/ Electronic microscope,電子分光/ Electron spectroscopy,ナノ粒子/ Nanoparticles
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)
Kang XIA
所属名 / Affiliation
東京大学 大学院工学系研究科応用化学専攻
共同利用者氏名 / Names of Collaborators in Other Institutes Than Hub and Spoke Institutes
ARIM実施機関支援担当者 / Names of Collaborators 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
UT-005：原子分解能元素マッピング構造解析装置
UT-007：高分解能分析電子顕微鏡
UT-008：高分解能トップエントリー型透過電子顕微鏡
UT-308：多機能走査型X線光電子分光分析装置(XPS)with AES
報告書データ / Report
概要（目的・用途・実施内容）/ Abstract (Aim, Use Applications and Contents)
Hybrid composites of metal nanoparticles and polyoxometalates (POMs) have attracted significant research interest in recent years due to their property of modulating catalytic properties and achieving synergistic catalytic effects. However, conventional metal-POM hybrid materials still face challenges such as structural instability, unclear modification effects, and unknown reaction mechanisms, hindering their practical application as catalysts. This research aims to elucidate the interaction between POMs and metal nanoparticles, enabling the rational and precise creation of active sites. Herein in this research, we focus on the utilization of multi-dentate POMs to modify metal nanoparticles and found their superior performance in catalysis.
実験 / Experimental
Metal nanoparticles modified with multi-dentate POMs were prepared (M-POM) and immobilized on supports (M-POM/support) if needed. The morphology and electronic state of these materials were analyzed using transmission electron microscopy (TEM, TEM-2000EX, TEM-2010F, JEM-ARM200F) and X-ray photoelectron spectroscopy (XPS, PHI VersaProbeIII).
結果と考察 / Results and Discussion
Through utilization of multi-dentate POM modification, ultra-stable and highly reactive gold nanoparticles were prepared in solution and efficiently catalyze a range of aerobic oxidation reactions, which work was published in Nature Communications this year. Furthermore, taking multi-dentate POM modification, a series of metal nanoparticles with diameters of several nano-meters can be prepared, for example, palladium nanoparticles (Fig. 1a). Owing to the air condition, partial oxidation of palladium can be observed by XPS through the peak at 336.3 eV assigned to palladium oxide, but the main peak at 334.9 eV showed a shift to lower binding energy than that of bulk metal at 335 eV, indicating electronic effect from multi-dentate POMs (Fig. 1b). In addition, the difference of electronic states of metal-POM before/after immobilization on supports was confirmed and further researches are being carried out.
図・表・数式 / Figures, Tables and Equations
Figure 1. a) TEM images, and b) XPS spectra of palladium nanoparticles modified with multi-dentate POMs.
その他・特記事項（参考文献・謝辞等） / Remarks(References and Acknowledgements)
・参考文献：(a) K. Xia, T. Yatabe, K. Yonesato, T. Yabe, K. Soichi, S. Yamazoe, A. Nakata, K. Yamaguchi, K. Suzuki, Angew. Chem. Int. Ed. 2022, 61, e202205873. (b) K. Xia, K. Yamaguchi, K. Suzuki, Angew. Chem. Int. Ed. 2023, 62, e202214506. ・東京大学微細構造解析部門の押川様、森田様に感謝します。
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)
-
Kang Xia, Ultra-stable and highly reactive colloidal gold nanoparticle catalysts protected using multi-dentate metal oxide nanoclusters, Nature Communications, 15, (2024).
DOI: 10.1038/s41467-024-45066-9
口頭発表、ポスター発表および、その他の論文 / Oral Presentations etc.
- 2024/03 The 104th CSJ Annual Meeting, Chiba, Japan (Kang Xia, Takafumi Yatabe, Kentaro, Yonesato, Tomohiro Yabe, Kosuke Suzuki, Kazuya Yamaguchi: 多座ポリオキソメタレートで保護した超安定・高活性なコロイド金ナノ粒子触媒)
- 2023/11. 8th Asia-Oceania Conference on Green and Sustainable Chemistry (AOC-GSC8), Auckland, New Zealand (Kang Xia, Takafumi Yatabe, Kentaro Yonesato, Tomohiro Yabe, Kosuke Suzuki, Kazuya Yamaguchi: Development of metal nanoparticle catalysts modified using multidentate polyoxometalates)
- 2023/10. The 13th CSJ Chemical Festa 2023, Tokyo, Japan (Kang Xia, Takafumi Yatabe, Kentaro Yonesato, Kosuke Suzuki, Kazuya Yamaguchi: Stable and Highly Reactive Colloidal Metal Nanoparticles Modified Using Polyoxometalates)
- 2023/09. The 132th CATSJ Meeting, Sapporo, Japan (Kang Xia, Takafumi Yatabe, Kentaro Yonesato, Kosuke Suzuki, Kazuya Yamaguchi: Development of highly stable and reactive colloidal gold nanoparticle catalysts protected using multidentate polyoxometalates)
- 2023/06. The 12th JACI/GSC Symposium, Tokyo, Japan (Kang Xia, Takafumi Yatabe, Kentaro Yonesato, Tomohiro Yabe, Kikkawa Soichi, Seiji Yamazoe, Kosuke Suzuki, Kazuya Yamaguchi: 環境調和型酸化反応を指向したポリオキソメタレート修飾金属ナノ粒子触媒の開発)
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