焙烧温度对花状Au/CeO_(2)催化剂催化氧化CO活性的影响  

Effect of calcination temperature on performance of flower-like Au/CeO_(2) catalyst for CO oxidation

作　　者：张静静 Zhang Jingjing(Department of Armys Tranining,Officers College of PAP,Guangzhou 510440,Guangdong,China)

机构地区：[1]武警警官学院训练基地,广东广州510440

出　　处：《工业催化》2022年第7期44-48,共5页Industrial Catalysis

基　　金：国家自然科学基金项目(51551204)。

摘　　要：以花状CeO_(2)为载体,采用沉积-沉淀法制备质量分数2%Au/CeO_(2)催化剂,借助ICP-AES、XRD、TEM、XPS、H_(2)-TPR等表征手段,研究焙烧温度对Au/CeO_(2)催化剂催化CO氧化活性的影响。结果表明,焙烧温度对催化剂的氧化还原能力影响显著,焙烧后的催化剂低温氧化CO活性明显提高,300℃焙烧制得的催化剂具有最高的CO低温催化活性,18℃下可将体积分数1%的CO催化消除至1.84 mg·m^(-3)。Au/CeO_(2) catalysts with Au mass fraction of 2%were prepared by deposition-precipitation method using flower-like CeO_(2) as support.The effects of calcination temperature on the catalytic activity for CO oxidation reaction were studied by means of ICP-AES,XRD,TEM,XPS and H_(2)-TPR techniques.The results showed that the low-temperature catalytic activity was significantly improved after calcination.The catalyst calcined at 300℃exhibited the highest low-temperature catalytic activity,and the CO volume fraction of 1%could be reduced to 1.84 mg·m^(-3) at 18℃.It is suggested that the redox capacity of the catalyst is closely related to the calcination temperature and plays a crucial role in the CO oxidation over the flower-like Au/CeO_(2) catalyst.

关 键 词：催化剂工程 焙烧温度 花状Au/CeO_(2)催化剂 CO氧化 

分 类 号：TQ426.6[化学工程] O643.36[理学—物理化学]