Preparation of Au/<i>β</i>-Mo<sub>2</sub>C catalyst with high thermal stability and its performance in the reverse water-gas shift

LIU Meng-jie; DING Wei; DAI Yong-chuan; ZHAO Yu-zhu; ZHAO Yue; HAO Yuan-chuan

Volume 48 Issue 3

Mar. 2020

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Article Navigation > Journal of Fuel Chemistry and Technology > 2020 > 48(3): 349-356

LIU Meng-jie, DING Wei, DAI Yong-chuan, ZHAO Yu-zhu, ZHAO Yue, HAO Yuan-chuan. Preparation of Au/β-Mo2C catalyst with high thermal stability and its performance in the reverse water-gas shift[J]. Journal of Fuel Chemistry and Technology, 2020, 48(3): 349-356.

Citation:

LIU Meng-jie, DING Wei, DAI Yong-chuan, ZHAO Yu-zhu, ZHAO Yue, HAO Yuan-chuan. Preparation of Au/β-Mo₂C catalyst with high thermal stability and its performance in the reverse water-gas shift[J]. Journal of Fuel Chemistry and Technology, 2020, 48(3): 349-356.

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Preparation of Au/β-Mo₂C catalyst with high thermal stability and its performance in the reverse water-gas shift

1.
College of Chemistry, Chemical Engineering and Environmental Engineering, Liaoning Shihua University, Fushun 113001, China
2.
No.3 Petrochemical Refinery of Fushun Petrochemical Co. Ltd. CNPC, Fushun 113004, China
3.
PetroChina Daqing Oilfield Co., Ltd., Daqing 163002, China

Funds:

The project was supported by the National Natural Science Foundation of China 21802061

the Doctoral Research Foundation Project of Liaoning Province Department of Science & Technology 20170520440

the Program for Liaoning Innovative and Entrepreneurship Training in University 201810148029

Received Date: 2019-12-18
Rev Recd Date: 2020-02-16

Available Online: 2021-01-23

Publish Date: 2020-03-10

Abstract

Abstract

β-Mo₂C support was first prepared by the temperature-programmed carbonization and the Au/β-Mo₂C catalysts with different Au loadings were then obtained by using the in -situ precipitation method. The Au/β-Mo₂C catalysts were characterized by X-ray diffraction (XRD), scanning transmission electron microscopy (STEM) and nitrogen physisorption; their performance, the thermal stability at the high temperature in particular was then investigated in the reverse water-gas shift (RWGS). The XRD results reveal that the diffraction peaks appeared at 34.44°, 38.02°, 39.44°, 52.12°, 61.53°, 69.62° and 74.65° correspond to the (100), (002), (101), (102), (110), (103) and (200) planes of β-Mo₂C, respectively, whereas no characteristic peak of Au species is detected, suggesting the high dispersion of Au nanoparticles on the Au/β-Mo₂C catalysts with a low Au loading (0.1%-0.5%). The STEM results illustrate that for the Au/β-Mo₂C catalysts with an Au loading of 0.5%-2.0%, gold nanoparticles in the form of atom clusters (about 2 nm) are anchored and uniformly dispersed on the β-Mo₂C surface. The nitrogen physisorption results demonstrate that the Au/β-Mo₂C catalysts have plenty of mesopores. The catalytic evaluation results indicate that the 0.2%Au/β-Mo₂C catalyst exhibits high activity and high selectivity to CO for the RWGS reaction; moreover, after the reaction, the Au nanoparticles are still evenly dispersed and the pore structure remain intact, suggesting that the Au/β-Mo₂C catalyst owns excellent performance and high thermal stability in the he reverse water-gas shift at high temperature.
- in-situ precipitation,
- lattice orientation,
- RWGS reaction,
- thermal stability,
- catalyst

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References(28)

References

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