2025-07-31 東京大学,東京都立大学,科学技術振興機構
＜関連情報＞
- https://www.k.u-tokyo.ac.jp/information/category/press/11693.html
- https://www.k.u-tokyo.ac.jp/information/upload/04d8375694030e5c48b8e623080358fcd42a866d.pdf
- https://advanced.onlinelibrary.wiley.com/doi/10.1002/advs.202509418
環状ポリオキソメタレート内に封入された表面露出型Pdナノクラスターを用いた選択的水素化 Surface-Exposed Pd Nanocluster Confined within a Ring-Shaped Polyoxometalate for Selective Hydrogenation
Rui Xi, Kentaro Yonesato, Takafumi Yatabe, Yoshihiro Koizumi, Soichi Kikkawa, Seiji Yamazoe, Koji Harano, Kazuya Yamaguchi, Kosuke Suzuki
Advanced Science Published: 28 July 2025
DOI:https://doi.org/10.1002/advs.202509418
Abstract
Developing efficient catalysts for selective hydrogenation of molecules bearing multiple reducible functional groups remains a major challenge. Palladium (Pd) nanoclusters are promising candidates owing to their strong H2 activation ability, broad substrate compatibility, and unique surface properties. However, the controlled synthesis of small Pd nanoclusters with accessible, coordinatively unsaturated active sites remains difficult as they are prone to aggregation. In this study, a strategy is presented to fabricate surface-exposed Pd nanoclusters confined within a ring-shaped polyoxometalate (POM) via a mild solid-state reduction process (1 atm H2, ≈25 °C). The resulting Pd nanocluster exhibits exceptional chemoselectivity in the hydrogenation of multifunctional substrates by preferentially adsorbing C═C and C≡C bonds on its discrete, exposed Pd surface with a well-defined coordination environment. Importantly, the rigid POM framework considerably stabilizes Pd nanocluster, enabling excellent reusability over multiple catalytic cycles. This study demonstrates a molecular templating approach for constructing robust and chemoselective metal nanocluster catalysts, offering new opportunities in the design of hydrogenation systems.
