The Adsorption Behavior and Reaction Mechanism of MnOx/TiO2 Catalytic Materials to NO and NH3 by DRIFTS
HELIAN Yizhe, MA Xiaoyu, CUI Suping, WAN Yeqiang
The Key Laboratory of New Functional Materials of Ministry of Education, College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124
Abstract: MnOx/TiO2 catalysts has been shown excellent selective catalyst reduction (SCR) activity at low temperature.In order to understand its mechanism thoroughly and improve its catalytic activity further, in situ diffuse reflectance infrared spectroscopy (DRIFTS) was adopted to systematically analyze the single adsorption and coadsorption of NO and NH3 on MnOx/TiO2 catalytic materials. It is considered that the selective catalytic reduction process of the catalytic material conforms to the Eley-Ridal mechanism,and the reaction occurs between the adsorbed NH3 and the gaseous NO,while the adsorbed NO and the produced azotate and nitrite will occupy the active site of the catalytic material,which affects the adsorption of NH3 and leads to the decrease of the denitrification activity.
赫连一哲, 马晓宇, 崔素萍, 万业强. 原位漫反射红外光谱研究NO和NH3在MnOx/TiO2催化材料上的吸附行为及反应机理[J]. 材料导报, 2018, 32(22): 3973-3978.
HELIAN Yizhe, MA Xiaoyu, CUI Suping, WAN Yeqiang. The Adsorption Behavior and Reaction Mechanism of MnOx/TiO2 Catalytic Materials to NO and NH3 by DRIFTS. Materials Reports, 2018, 32(22): 3973-3978.
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2018, Vol. 32 
