Promotional Role of the TiO x Nanorod Arrays as a Support to Load MnO x for Low-Temperature NH3‑Selective Catalytic Reduction of NO x : Comparison of Two Preparation Strategies

• Published in: Energy & fuels 2022-01, Vol.36 (2), p.965-977
• Main Authors: Liu, Huan, Yan, Zheng, Mu, Haifeng, Liu, Lili, Wang, Hao, Luan, Jingde, Ke, Xin
• Format: Article
• Language: English
• Subjects: Catalysis and Kinetics
• ISSN: 0887-0624; 1520-5029
• DOI: 10.1021/acs.energyfuels.1c02957

It is essential to design and exploit high-efficiency denitration catalysts at low temperatures (100–300 °C). In this article, we propose an effective strategy to fabricate a series of catalysts by loading MnO x onto TiO x 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 °C. By the characterizations of physical properties and chemical compositions, it is found that TiO x 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.