【公開日：2025.06.10】【最終更新日：2025.05.08】
課題データ / Project Data
課題番号 / Project Issue Number
24UT0038
利用課題名 / Title
Hybrid 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
金属ナノ粒子, ポリオキソメタレート,ナノ粒子/ Nanoparticles,電子顕微鏡/ Electronic microscope,電子分光/ Electron spectroscopy
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)
夏 康
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
押川 浩之,森田 真理,沖津 康平
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-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) are attractive materials in diverse research fields due to their property of modulating catalytic properties and achieving synergistic catalytic effects.1 Recently, heterometallic nanoparticles have gained significant interest as they offer a new degree of freedom to vary properties by blending two and more metals in one particle.2 However, few researches have been conducted to explore POM-modified heterometallic nanoparticles. owing to the difficulty in controlling the obtained hybrid structures.1,3 This research aims to elucidate and utilize the interaction between POMs and metal nanoparticles based on our previous engagement on POM-modified monometallic nanoparticles, enabling the rational and precise creation of hybrid composites of POMs and heterometallic nanoparticles.
実験 / Experimental
Heterometallic nanoparticles modified with selected POMs were prepared (M1M2-POM-x) using a typical solution-based synthetic method. The morphology and electronic state of these materials were analyzed using transmission electron microscopy (TEM,:TEM-2010F), scanning transmission electron microscopy (STEM: JEM-ARM200F ThermalFE), and X-ray photoelectron spectroscopy (XPS: PHI VersaProbeIII).
結果と考察 / Results and Discussion
Through utilization of POM modification, different heterometallic nanoparticles were prepared in solution without obvious agglomeration. Notably, these heterometallic nanoparticles can be modulated with their structures into either core-shell or alloy nanoparticles simply by adjusting molar ratios of metals while maintaining the similar particle sizes (Figure 1). STEM-EDS mapping results further revealed the structures of hybrid nanoparticles with POM modification. According to a series of characterization techniques and control experiments, the manipulation of metal-POM interaction was confirmed as the key in achieving this facile structural engineering of heterometallic nanoparticles. XPS results also confirmed the existence of electronic interaction within the heterometallic nanoparticles. Finally, these POM-modified heterometallic nanoparticles were applied to catalytic reactions with exceptional activity compared to the monometallic ones.
図・表・数式 / Figures, Tables and Equations
Figure 1. TEM images of POM-modified heterometallic nanoparticles prepared by varying the molar ratio of metals.
その他・特記事項（参考文献・謝辞等） / Remarks(References and Acknowledgements)
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)
口頭発表、ポスター発表および、その他の論文 / Oral Presentations etc.
- Kang Xia, Kosuke Suzuki, Kazuya Yamaguchi, “Development of heterometallic nanoparticles by polyoxometalate protection”, The 105th Chemical Society of Japan Annual Meeting (Osaka, Japan), 2025/03
- Kang Xia, “Polyoxometalate-modified metal nanoparticle catalysts”, The 16th HOPE Meeting by JSPS (Kanagawa, Japan), 2025/03
- Kang Xia, Takafumi Yatabe, Kazuya Yamaguchi, Kosuke Suzuki, “Design of metal nanoparticle-based catalysts modified with lacunary polyoxometalates”, 10th IUPAC International Conference on Green Chemistry (Beijing, China), 2024/10
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