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Materials 2018, 11(1), 172; https://doi.org/10.3390/ma11010172

The Enhanced Catalytic Performance and Stability of Rh/γ-Al2O3 Catalyst Synthesized by Atomic Layer Deposition (ALD) for Methane Dry Reforming

1
School of Chemistry and Chemical Engineering, Zhoukou Normal University, Zhoukou 466001, China
2
School of Computer Science and Technology, Zhoukou Normal University, Zhoukou 466001, China
3
School of Life Science and Agriculture, Zhoukou Normal University, Zhoukou 466001, China
*
Author to whom correspondence should be addressed.
Received: 11 December 2017 / Revised: 5 January 2018 / Accepted: 13 January 2018 / Published: 22 January 2018
(This article belongs to the Section Advanced Nanomaterials)
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Abstract

Rh/γ-Al2O3 catalysts were synthesized by both incipient wetness impregnation (IWI) and atomic layer deposition (ALD). The TEM images of the two catalysts showed that the catalyst from ALD had smaller particle size, and narrower size distribution. The surface chemical states of both catalysts were investigated by both XPS and X-ray Absorption Near Edge Structure (XANES), and the catalyst from IWI had higher concentration of Rh3+ than that from ALD. The catalytic performance of both catalysts was tested in the dry reforming of methane reaction. The catalyst from ALD showed a higher conversion and selectivity than that from IWI. The stability testing results indicated that the catalyst from ALD showed similar stability to that from IWI at 500 °C, but higher stability at 800 °C. View Full-Text
Keywords: heterogeneous catalyst; atomic layer deposition; crystal growth; XPS; X-ray techniques; microstructure heterogeneous catalyst; atomic layer deposition; crystal growth; XPS; X-ray techniques; microstructure
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Li, Y.; Jiang, J.; Zhu, C.; Li, L.; Li, Q.; Ding, Y.; Yang, W. The Enhanced Catalytic Performance and Stability of Rh/γ-Al2O3 Catalyst Synthesized by Atomic Layer Deposition (ALD) for Methane Dry Reforming. Materials 2018, 11, 172.

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