Effects of precipitant and calcination temperature on the catalytic activities of chromic oxide catalysts for NO oxidation at ambient temperature
Effects of precipitant and calcination temperature on the catalytic activities of chromic oxide catalysts for NO oxidation at ambient temperature
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沉淀剂和焙烧温度对氧化铬催化剂常温NO氧化催化活性的影响
DOI：
10.1007/s11144-017-1245-4
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发表时间：
2017-08
影响因子：
1.8
通讯作者：
He Dannong
中科院分区：
文献类型：
--
作者：
Liu Shuang;Zhao Kunfeng;Yang Wenjing;Shi Jianlin;He Dannong
采用沉淀法制备了不同的氧化铬催化剂，并将其用于常温下NO氧化反应。研究发现，氧化铬催化剂的催化性能与焙烧温度和沉淀剂的选择有很大关系。在300 °C下，以氨水溶液为沉淀剂，得到了最佳的催化剂，该催化剂可将NO氧化为NO2，运行时间大于500 min。通过XRD、BET、HRTEM、SEM、TG、拉曼、XPS和原位DRIFTS等测试手段对催化剂进行了表征，结果表明，氨水溶液作为沉淀剂时，催化剂呈现出非晶态结构，羟基比表面积大，颗粒尺寸小，八面体金属-氧键畸变，表面Cr含量高，从而表现出较高的氧化铬催化剂活性。沉淀剂不易分解，引入杂质后，对NO氧化的催化性能较低。
Various chromic oxide catalysts were prepared by the precipitation method and used for NO oxidation at ambient temperature. It was found that the catalytic performance of chromic oxide catalysts was greatly dependent on the calcination temperature and the choice of the precipitants. The best catalyst was obtained under 300 °C with ammonia solution as the precipitant, which can oxidize NO to NO2for more than 500 min running. The examinations of catalysts based on XRD, BET, HRTEM, SEM, TG, RAMAN, XPS and in situ DRIFTS revealed that ammonia solution as the precipitant presented amorphous phase, large surface area with hydroxyl, packing particles with small size, distorted octahedral metal–oxygen bonds with high surface concentration of Cr and then exhibited high catalytic activity of chromic oxide catalysts. The precipitants displayed difficulty to decompose and introducing impurity showed low catalytic performance over the chromic oxide catalysts for NO oxidation.
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影响因子：
--
作者：
Z. Shu;Weiming Huang;Zile Hua;Lingxia Zhang;Xiangzhi Cui;Yu Chen;Hangrong Chen;Chenyang Wei
通讯作者：
Z. Shu;Weiming Huang;Zile Hua;Lingxia Zhang;Xiangzhi Cui;Yu Chen;Hangrong Chen;Chenyang Wei
影响因子：
5.3
作者：
Mingxi Wang;Zhenghong Huang;K. Shen;F. Kang;K. Liang
通讯作者：
Mingxi Wang;Zhenghong Huang;K. Shen;F. Kang;K. Liang
影响因子：
7.4
作者：
Guerrini, Gian Luca
通讯作者：
Guerrini, Gian Luca
影响因子：
3.9
作者：
Shuang Liu;Zhang Min-tao;Yanqiang Huang;Zhao Kunfeng;Gao Zhenyuan;Wu Meijian;Dong Yamei;W. Ting;Jianlin Shi;D. He
通讯作者：
Shuang Liu;Zhang Min-tao;Yanqiang Huang;Zhao Kunfeng;Gao Zhenyuan;Wu Meijian;Dong Yamei;W. Ting;Jianlin Shi;D. He
影响因子：
22.1
作者：
J. Sousa;M. Pereira;J. Figueiredo
通讯作者：
J. Sousa;M. Pereira;J. Figueiredo