The Preparation Of Copper-Cerium Catalysts By Templated Method And Its Study For Catalytic Oxidation Of CO

CO-Carbon Monoxide-tend to result in irreversible injury to human beings owing to its colorless,odorless and imperceptible characteristics under normal conditions.The PEMFC disability will occur when referring to CO in chemical research.Therefore,the technology of catalytic oxidation of CO plays a pretty important role both in life and chemical research field,exploring the catalyst of CO catalytic oxidation have always been one of the hotspots.The noble metal catalyst features high catalytic activity even suitable for low-temperature,yet its high budget might lead to broaden limitation.While low-cost non-noble metal catalyst's low-temperature catalytic activity is weaker than noble metal catalyst.Taking various factors into consideration,it's urgent to exploit the non-noble metal catalyst with relatively high CO oxidation activity.In order to meet this requirement,the thesis which is the research tide for recent several years,designed and prepared two series of this composite catalyst,focus on the reaction of Cu O-CeO₂.We regard POPs as the template synthesizing Cu O-CeO₂ in different proportion for catalytic oxidation of CO and processing research with a series of representation methods?XRD,SEM,TEM,BET,TPR,XPS and so on?in detail in this thesis.It's obvious the synthetic catalyst behaves excellent performance on CO catalytic activity when the ratio of copper and cerium is 3:7 and the activity stays even quite stable after 80 hours'reaction with superior water-resistant display at the same time.The study shows that by means of the template of POPs the synthetic Cu O-CeO2 shares amazing specific surface area which is 247?/g or so coupled with higher catalytic activity directly,which is the largest specific surface area for the ever reported catalyst of Cu O-CeO₂.The copper oxide with high concentration dispersing uniformly on the copper and the interaction interface composed of copper oxide and cerium oxide also lead to the high activity together.Secondly,the effect of different synthesis methods on catalytic oxidation of CO by copper cerium catalyst was studied.The molar ratio of copper to cerium was 3:7.Four different synthesis methods were used:POPs method,impregnation method,co-precipitation method and mixed method.The relevant copper cerium catalyst.The results showed that the activity of the copper ruthenium catalyst synthesized by different methods was different,and the activity of the catalyst prepared by POPs method was the best.The temperature of complete CO conversion was 100°C.Subsequently,through a series of characterization tests,the copper cerium catalyst prepared by POPs method has the largest specific surface area and the largest dispersion degree of copper oxide on cerium oxide,which is the main reason leading to the difference in activity.Last but not the least,we've take the GO as an template to study what's the effect on the Cu O-CeO₂ catalyst activity while in different temperature.