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Nano Research

Article Title

Ultra-small Pd clusters supported by chitin nanowires as highly efficient catalysts

Keywords

Pd clusters, chitin nanowires, supported catalyst, hydrogenation

Abstract

ABSTRACT For the first time, chitin microspheres woven from nanowires with multi-scale porous structures were used as an excellent support for a catalyst of ultra-small Pd clusters. The Pd species anchored on the precursor Pre-Pd@chitin were 0.6 nm in average size, while the reduced catalyst Red-Pd@chitin featured ultra-small particles of 1.3 nm in average size. X-ray absorption spectroscopy (XAS) and transmission electron microscopy (TEM) demonstrated that the Pd catalyst in both oxidative and reductive states retained good dispersity and ultra-small clusters. The catalyst was tested for the hydrogenation of p-nitroanisole, exhibiting an excellent initial rate (13× that of commercial Pd/C) and excellent turnover frequency reaching 52,000 h−1. Furthermore, the catalyst could be recycled and used more than 10 times with no decay of the catalytic activity, suggesting potential industrial applications.

Graphical Abstract

Publisher

Tsinghua University Press

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