Iron phosphide nanocrystals as an air-stable heterogeneous catalyst for liquid-phase nitrile hydrogenation

Tomohiro Tsuda, Min Sheng, Hiroya Ishikawa, Seiji Yamazoe, Jun Yamasaki, Motoaki Hirayama, Sho Yamaguchi, Tomoo Mizugaki and Takato Mitsudome ()
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Tomohiro Tsuda: Osaka University
Min Sheng: Osaka University
Hiroya Ishikawa: Osaka University
Seiji Yamazoe: Tokyo Metropolitan University
Jun Yamasaki: Osaka University
Motoaki Hirayama: The University of Tokyo
Sho Yamaguchi: Osaka University
Tomoo Mizugaki: Osaka University
Takato Mitsudome: Osaka University

Nature Communications, 2023, vol. 14, issue 1, 1-12

Abstract: Abstract Iron-based heterogeneous catalysts are ideal metal catalysts owing to their abundance and low-toxicity. However, conventional iron nanoparticle catalysts exhibit extremely low activity in liquid-phase reactions and lack air stability. Previous attempts to encapsulate iron nanoparticles in shell materials toward air stability improvement were offset by the low activity of the iron nanoparticles. To overcome the trade-off between activity and stability in conventional iron nanoparticle catalysts, we developed air-stable iron phosphide nanocrystal catalysts. The iron phosphide nanocrystal exhibits high activity for liquid-phase nitrile hydrogenation, whereas the conventional iron nanoparticles demonstrate no activity. Furthermore, the air stability of the iron phosphide nanocrystal allows facile immobilization on appropriate supports, wherein TiO2 enhances the activity. The resulting TiO2-supported iron phosphide nanocrystal successfully converts various nitriles to primary amines and demonstrates high reusability. The development of air-stable and active iron phosphide nanocrystal catalysts significantly expands the application scope of iron catalysts.

Date: 2023
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DOI: 10.1038/s41467-023-41627-6

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