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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, we present a strategy 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.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: heterogeneous catalysis, palladium nanoclusters, polyoxometalates, selective hydrogenations

刊行年月日: 2025-07-28

出版者: Wiley

掲載誌:

• Advanced Science (ISSN: 21983844) vol. 12 issue. 38 e09418

研究助成金:

• Japan Society for the Promotion of Science JP24K01448
• Japan Society for the Promotion of Science JP24H02210
• Japan Society for the Promotion of Science JP24H02217
• Japan Society for the Promotion of Science JP24K01279
• Japan Society for the Promotion of Science JP23K13812
• Japan Society for the Promotion of Science JP22H04971
• Core Research for Evolutional Science and Technology JPMJCR20B2
• Fusion Oriented REsearch for disruptive Science and Technology JPMJFR213

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1002/advs.202509418

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更新時刻: 2025-10-21 16:06:30 +0900

MDRでの公開時刻: 2025-10-21 15:43:36 +0900