FeOx掺杂对CeO2纳米晶催化甲烷选择氯氧化反应性能的影响

›› 2018, Vol. 3 ›› Issue (6): 48-54.

FeOx掺杂对CeO2纳米晶催化甲烷选择氯氧化反应性能的影响

（大理大学药学与化学学院，云南大理671000）

收稿日期:2017-10-31 出版日期:2018-06-15 发布日期:2018-06-15
作者简介:何洁丽，副研究员，博士，主要从事纳米催化材料、低碳烃类催化氧化研究.
基金资助:
国家自然科学基金资助项目（21403096；21563003）；云南省教育厅科学研究基金资助项目（2015Z158）；大理
大学博士启动费资助项目（KYBS201413）

A Study on the Influence of FeOx Doping into CeO2 Nanocrystal on Selective Oxidative Chlorination
of Methane

（College of Pharmacy and Chemistry, Dali University, Dali, Yunnan 671000, China）

Received:2017-10-31 Online:2018-06-15 Published:2018-06-15

摘要/Abstract

摘要：

目的：探究FeOx掺杂对CeO2纳米晶的晶体结构和形貌，及甲烷氯氧化反应性能的影响。方法：样品晶体结构采用XRD
表征；形貌采用TEM和HRTEM表征；考察CeO2和FeOx-CeO2纳米棒不同反应温度时甲烷氯氧化反应性能，计算表观活化能。
结果：CeO2掺杂FeOx后，CeO2晶胞略微收缩。FeOx-CeO2纳米棒反应后，具有向纳米立方体变化的趋势；FeOx-CeO2纳米立方体
反应前后，其形貌和尺寸几乎没有变化。CeO2纳米棒掺杂FeOx后，表观活化能由106 kJ/mol下降到84 kJ/mol。结论：CeO2与
FeOx可能形成了固溶体，CeO2掺杂FeOx提高了其甲烷氯氧化反应性能。

关键词: 甲烷, 氯氧化, 一氯甲烷, FeOx-CeO2纳米催化剂

Abstract:

Objective: The paper is to study the influence of FeOx doping into CeO2 nanocrystal on the crystal structure, morphology
and the catalytic performance on oxidative chlorination of methane. Methods: Crystal structure of materials was detected by XRD, and
the morphology was observed by TEM and HRTEM. Catalytic performance on the oxidative chlorination of methane over CeO2 and
FeOx - CeO2 nanorods at different reaction temperatures was investigated, and the apparent activation energy was also calculated.
Results: The unit cell of CeO2 nanocatalysts contracted slightly after doping with FeOx. The morphology of FeOx-CeO2 nanorods had a
trend of changing into cube after reaction. However, for FeOx-CeO2 nanocubes, the morphology and size were almost unchanged. For
CeO2 nanorods, the apparent activation energy was dropped from 106 kJ/mol to 84 kJ/mol after doping with FeOx. Conclusion: CeO2
and FeOx probably formed solid solution. The catalytic performance on the oxidative chlorination of methane was improved for CeO2
nanocatslysts after doping with FeOx.

Key words: methane, oxidative chlorination, methyl chloride, FeOx-CeO2 nanocatalysts

中图分类号:

何洁丽，严亚，杨蓉，李婧炜*. FeOx掺杂对CeO2纳米晶催化甲烷选择氯氧化反应性能的影响[J]. , 2018, 3(6): 48-54.

He Jieli, Yan Ya, Yang Rong, Li Jingwei*. A Study on the Influence of FeOx Doping into CeO2 Nanocrystal on Selective Oxidative Chlorination
of Methane[J]. , 2018, 3(6): 48-54.

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