苯在CuO-CeO2混合氧化物上的催化燃烧

Catalytic combustion of benzene over CuO-CeO2 mixed oxides.

作者信息

Jung Won Young, Lim Kwon-Taek, Hong Seong-Soo

出版信息

J Nanosci Nanotechnol. 2014 Nov;14(11):8507-11. doi: 10.1166/jnn.2014.9950.

DOI:10.1166/jnn.2014.9950

Abstract

Catalytic combustion of benzene over CuO-CeO2 mixed oxides has been investigated. The CuO-CeO2 mixed oxides were prepared by the combustion method using malic acid as an organic fuel and characterized by XRD, XPS and TPR. For the CuO-CeO2 catalyst with a Cu/(Cu + Ce) molar ratio of more than 0.4, highly dispersed copper oxide species were shown at 2θ = 35.5 degrees and 38.8 degrees. The CuO-CeO2 catalyst prepared using 2.0 M malic acid showed the highest activity, with conversion reaching nearly 100% at 350 degrees C. In addition, the highest activity is shown on Cu0.40 (the index denotes the molar ratio Cu/(Cu + Ce)) sample and then it decreases on Cu0.5 and Cu0.7 samples.

摘要

研究了苯在CuO-CeO₂混合氧化物上的催化燃烧。采用燃烧法以苹果酸为有机燃料制备了CuO-CeO₂混合氧化物，并通过XRD、XPS和TPR对其进行了表征。对于Cu/(Cu + Ce)摩尔比大于0.4的CuO-CeO₂催化剂，在2θ = 35.5°和38.8°处出现了高度分散的氧化铜物种。使用2.0 M苹果酸制备的CuO-CeO₂催化剂表现出最高的活性，在350℃时转化率接近100%。此外，Cu0.40（该指数表示Cu/(Cu + Ce)的摩尔比）样品表现出最高的活性，然后在Cu0.5和Cu0.7样品上活性降低。