原位漫反射红外光谱研究CeO_(2)/Co_(3)O_(4)-CuO催化CO氧化反应  

In situ DRIFTS of CO oxidation on CeO_(2)/Co_(3)O_(4)-CuO catalyst

作　　者：叶丽萍 杨丙星 YE Li-ping;YANG Bing-xing(State Key Laboratory of Polyolefins and Catalysis,Shanghai 200062,China;Shanghai Research Institute of Chemical Industry Co.,Ltd.,Shanghai 200062,China;Shanghai Key Laboratory of Catalysis Technology for Polyolefins,Shanghai 200062,China)

机构地区：[1]聚烯烃催化技术与高性能材料国家重点实验室,上海200062 [2]上海化工研究院有限公司,上海200062 [3]上海市聚烯烃催化技术重点实验室,上海200062

出　　处：《应用化工》2022年第6期1681-1684,共4页Applied Chemical Industry

基　　金：上海市技术带头人(20XD1431700)。

摘　　要：采用原位漫反射傅里叶变换红外光谱技术,研究了15%CeO_(2)/Co_(3)O_(4)、15%CeO_(2)/CuO和15%CeO_(2)/Cu_(0.2)Co_(0.8)O_(δ)催化剂表面上CO催化氧化反应过程。结果表明,15%CeO_(2)/Co_(3)O_(4)催化剂在30℃时即可催化CO完全氧化成CO_(2),15%CeO_(2)/CuO催化剂表面存在明显的Cu^(+)-CO吸收峰,CuO掺杂改性的15%CeO_(2)/Cu_(0.2)Co_(0.8)O_(δ)催化剂表面具有较强的CO吸附性能,并且由于CuO与Co_(3)O_(4)协同作用影响,表面活性位增多,碳酸盐吸收峰在1700~1200 cm^(-1)范围内出现较宽的吸收带。升温反应过程中,15%CeO_(2)/Cu_(0.2)Co_(0.8)O_(δ)催化剂表面的碳酸盐中间物种可以在270℃时完全转化。In situ diffuse reflectance infrared Fourier transform spectroscopy(DRIFTS)was used to study catalytic oxidation of CO on 15%CeO_(2)/Co_(3)O_(4),15%CeO_(2)/CuO and 15%CeO_(2)/Cu_(0.2)Co_(0.8)O_(δ)catalysts.The results show that CO could be completely oxidized to CO_(2)by the 15%CeO_(2)/Co_(3)O_(4)catalyst at 30℃,while there is an obvious Cu^(+)-CO absorption peak on the surface of 15%CeO_(2)/CuO.15%CeO_(2)/Cu_(0.2)Co_(0.8)O_(δ)doped by CuO also shows strong CO adsorption capacity.In addition,due to the synergistic effect of CuO and Co_(3)O_(4),the surface active sites of 15%CeO_(2)/Cu_(0.2)Co_(0.8)O_(δ)increased,and the carbonate absorption peak appeared a wide band in the range of 1700~1200 cm^(-1).During the heating reaction,the carbonate interspecies on the surface of 15%CeO_(2)/Cu_(0.2)Co_(0.8)O_(δ)catalyst can be completely transformed at 270℃.

关 键 词：原位漫反射 CO氧化 负载型催化剂 

分 类 号：TQ032[化学工程] O643[理学—物理化学]