Citation: Xueke Zhou, Haitao Zhao, Shaojun Liu, Yang Yang, Ruiyang Qu, Chenghang Zhen, Xiang Gao. The relationship of morphology and catalytic performance of CeO₂ catalysts for reducing nitrobenzene to azoxybenzene under the base-free condition[J]. Chinese Chemical Letters, ;2021, 32(2): 761-764. doi: 10.1016/j.cclet.2020.05.023 shu

The relationship of morphology and catalytic performance of CeO₂ catalysts for reducing nitrobenzene to azoxybenzene under the base-free condition

State Key Lab of Clean Energy Utilization, State Environmental Protection Engineering Center for Coal-Fired Air Pollution Control, Zhejiang University, Hangzhou 310027, China

xgao1@zju.edu.cn

Received Date: 26 March 2020
Revised Date: 6 May 2020
Accepted Date: 18 May 2020
Available Online: 2 June 2020

Figures(3)

CeO₂ morphology was proposed to be a crucial factor for reducing nitrobenzene to azoxybenzene under the base-free condition. Herein, the structure-activity relationship of CeO₂ catalysts was explored to improve the azoxybenzene yield. A series of CeO₂ catalysts were synthesized with seven morphologies to obtain different Ce³⁺ proportion and various surface areas. Notably, the catalytic performance of these samples for reducing nitrobenzene to azoxybenzene enhanced with the increasing Ce³⁺ proportion. With the highest surface Ce³⁺ proportion, the Rod-CeO₂ catalyst exhibited 100% conversion of nitrobenzene and 89.8% azoxybenzene selectivity in 7 h at 150 ℃ under 1 MPa CO. Moreover, the preliminary mechanistic analysis indicated that the inhabitation of azoxybenzene to by-product azobenzene resulted in the high selectivity of azoxybenzene.
- Ceria catalyst,
- Ce³⁺ proportion,
- Nitrobenzene,
- Azoxybenzene,
- Base-free
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The relationship of morphology and catalytic performance of CeO2 catalysts for reducing nitrobenzene to azoxybenzene under the base-free condition

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通讯作者: 陈斌, bchen63@163.com

The relationship of morphology and catalytic performance of CeO₂ catalysts for reducing nitrobenzene to azoxybenzene under the base-free condition