Ultra-stable and highly reactive colloidal gold nanoparticle catalysts protected using multi-dentate metal oxide nanoclusters

Kang Xia, Takafumi Yatabe, Kentaro Yonesato, Soichi Kikkawa, Seiji Yamazoe, Ayako Nakata, Ryo Ishikawa, Naoya Shibata, Yuichi Ikuhara, Kazuya Yamaguchi and Kosuke Suzuki ()
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Kang Xia: The University of Tokyo
Takafumi Yatabe: The University of Tokyo
Kentaro Yonesato: The University of Tokyo
Soichi Kikkawa: Tokyo Metropolitan University
Seiji Yamazoe: Tokyo Metropolitan University
Ayako Nakata: National Institute for Materials Science (NIMS)
Ryo Ishikawa: The University of Tokyo
Naoya Shibata: The University of Tokyo
Yuichi Ikuhara: The University of Tokyo
Kazuya Yamaguchi: The University of Tokyo
Kosuke Suzuki: The University of Tokyo

Nature Communications, 2024, vol. 15, issue 1, 1-11

Abstract: Abstract Owing to their remarkable properties, gold nanoparticles are applied in diverse fields, including catalysis, electronics, energy conversion and sensors. However, for catalytic applications of colloidal gold nanoparticles, the trade-off between their reactivity and stability is a significant concern. Here we report a universal approach for preparing stable and reactive colloidal small (~3 nm) gold nanoparticles by using multi-dentate polyoxometalates as protecting agents in non-polar solvents. These nanoparticles exhibit exceptional stability even under conditions of high concentration, long-term storage, heating and addition of bases. Moreover, they display excellent catalytic performance in various oxidation reactions of organic substrates using molecular oxygen as the sole oxidant. Our findings highlight the ability of inorganic multi-dentate ligands with structural stability and robust steric and electronic effects to confer stability and reactivity upon gold nanoparticles. This approach can be extended to prepare metal nanoparticles other than gold, enabling the design of novel nanomaterials with promising applications.

Date: 2024
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DOI: 10.1038/s41467-024-45066-9

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