摘要
应用原位Mossbauer谱系统地考察了制备方法、锡组分数量、反应气氛及其它组分对铂锡/氧化铝催化剂中锡组分存在状态的影响,获得了锡组分在各种条件下存在状态的清晰图像,从而合理解释了催化剂的反应行为,为催化剂制备及改进提供了依据。
In our previous studies, it was reported that the catalytic activity of PtSn/Al2O3 was deactivated by metallic tin, but promoted by oxidic tin. In this paper, in situ Mossbauer spectroscopy was used to characterize the influence of the preparation methods, the loaded amount of Sn component, the reaction atmosphere and the additives on the states of tin component of the PtSn/Al2O3 catalysts. Much useful information was provided on the preparation of catalysts, the choice of reaction conditions and the understanding of the dehydrogenation process.
