Standardization of Catalyst Preparations using Reference Catalysts

为了通过一个参考催化剂项目建立催化剂制备的标准化，我们选择了三种负载型金属氧化物催化剂：钼-氧化铝、钒-钛和钴-氧化铝，这三种催化剂都是重要的环境催化剂。只有催化剂组成是一个共同的参数，希望项目成员用自己的方法制备催化剂，并从自己感兴趣的角度对催化剂进行表征。通过对所得结果的反复讨论，我们旨在明确催化剂制备及其表征的关键因素。对浸渍方法、浸渍溶液的pH、氧化铝的表面积、干燥过程的温度和气氛、煅烧温度等条件进行了广泛而深入的研究，并比较了这些条件对催化剂性能的影响。由于本项目是基于许多独立研究人员的合作研究工作，因此将各种可用的检测方法应用于表征，包括传统的检测方法和最新的表面科学技术，并将结果反馈到催化剂制备的改进中。最后，通过引入“影响指数”的概念对研究进行了总结。“影响指数”是指制备条件对催化剂效率的影响程度的度量。所有的研究结果已在若干国际期刊上发表或正在印刷，共计16篇论文。

In order to establish the standardization of catalyst preparations by one of the reference catalyst project, we selected three kinds of supported metal oxide catalysts : molybdena-alumina, vanadia-titania and cobalt-alumina, all of which are appreciated to be important as environmental catalysts.Only catalyst composition was indicated as a common parameter, and project members were expected to prepare catalysts by their own methods and make their characterization from the standpoint of their own interest.By repeating discussions on the obtained results, we aimed to make clear the key factors on the catalyst preparations and their characterization. The method of impregnation, pH of impregnation solution, suface area of alumina, temperature and atomosphere of drying process, calcination temperature and so on were investigated extensively and intensively, and the effect of these conditions on catalyst performance were compared.Because this project was based on the cooperative research woks by many independent researchers, there were applied the wide variety of available inspection methods for characterization, including conventional ones to the newest surface science techniques, and the results were fed back to the improvement of catalyst preparations.Finally, the research were brought to a conclusion by introducing the concept of "impact index", which means a measure for the intensity of preparation conditions onto the catalyst efficiencies.All the results were published or are now in printing on several international journals as 16 papers.