Rh₂O₃/hexagonal CePO₄ nanocatalysts for N₂O decomposition

Abstract

Hexagonal CePO₄ nanorods were prepared by a precipitation method and hexagonal CePO₄ nanowires were prepared by hydrothermal synthesis at 150 °C. Rh(NO₃)₃ was then used as a precursor for the impregnation of Rh₂O₃ onto these CePO₄ materials. The Rh₂O₃ supported on the CePO₄ nanowires was much more active for the catalytic decomposition of N₂O than the Rh₂O₃ supported on CePO₄ nanorods. The stability of both catalysts as a function of time on stream was studied and the influence of the co-feed (CO₂, O₂, H₂O or O₂/H₂O) on the N₂O decomposition was also investigated. The samples were characterized by N₂ adsorption-desorption, inductively coupled plasma optical emission spectroscopy, X-ray diffraction, transmission electron microscopy, X-ray photoelectron microscopy, hydrogen temperature-programmed reduction, oxygen temperature-programmed desorption, and CO₂ temperature-programmed desorption in order to correlate the physicochemical and catalytic properties.

Graphical abstract

Keywords

Rh₂O₃ / CePO₄ / N₂O decomposition

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Acknowledgements

This project was supported by the National Natural Science Foundation of China (Grant No. 21477022).

Electronic Supplementary Material

Supplementary material is available in the online version of this article at http://dx.doi.org/10.1007/s11705-017-1659-6 and is accessible for authorized users.

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