Promotional Role of the TiOx Nanorod Arrays as a Support to Load MnOx for Low-Temperature NH3-Selective Catalytic Reduction of NOx: Comparison of Two Preparation Strategies

It is essential to design and exploit high-efficiency denitration catalysts at low temperatures (100-300 degrees C). In this article, we propose an effective strategy to fabricate a series of catalysts by loading MnOx onto TiOx nanorod arrays with the sol-impregnation method (denoted as Mn/TiNR catalysts), which show promising low-temperature denitration efficiency in the temperature range of 100-300 degrees C. By the characterizations of physical properties and chemical compositions, it is found that TiOx nanorod arrays provide a high surface area to load the active sites and improve the interaction between Ti and Mn elements. In comparison with its counterpart that is prepared with a similar approach using the sol that contains both Mn and Ti (Mn-Ti catalysts), the Mn/TiNR catalysts have apparent advantages on the content of surface chemical oxygen, promoting the fast SCR reaction. This work provides an effective designation strategy for developing low-temperature selective catalytic reduction (SCR) catalysts via optimizing the interaction of active ingredients.

Automated summary

This article proposes an effective strategy to fabricate a series of catalysts by loading MnOx onto TiOx nanorod arrays, showing promising low-temperature denitration efficiency in the temperature range of 100-300 degrees C. The TiOx nanorod arrays provide a high surface area to load the active sites and improve the interaction between Ti and Mn elements, leading to apparent advantages on the content of surface chemical oxygen for promoting the fast SCR reaction in comparison with Mn-Ti catalysts prepared with a similar approach.