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Sol-gel preparation of mesoporous cerium-doped FeTi nanocatalysts and its SCR activity of NOx with NH3 at low temperature

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Abstract

A series of cerium-doped mesoporous FeTi nanocatalysts were synthesized through a sol-gel method, and their performances for the selective catalytic reduction (SCR) of NOx with NH3 were explored. The mesoporous Ce(0.2) FeTi catalyst exhibited excellent low-temperature catalytic activity and high resistance to sulfur poisoning. A NOx conversion higher than 95 % was achieved at 200 °C over the Ce(0.2) FeTi catalyst. The strong interactions between cerium, iron oxides and titania in the Ce(0.2) FeTi catalyst resulted in a large amount of Ce3+, more active chemisorbed oxygen and more Brønsted acid sites, which contributed to the high catalytic activity for the SCR of NOx in the low-temperature region. The enhanced BET surface area and pore volume of its mesoporous structure also played an important role in its catalytic performance. Based on the DRIFTS analysis, an Eley–Rideal mechanism was proposed for the SCR over the Ce(0.2) FeTi mesoporous catalyst.

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Acknowledgments

The authors gratefully acknowledge the financial support provided by the National Natural Science Foundation of China (21377061, 21003094, and 81270041), the Asia Research Center in Nankai University (AS1326), the Natural Science Foundation of Tianjin (12JCQNJC05800), and the Key Technologies R&D Program of Tianjin (13ZCZDSF00300), as well as the assistance provided Dr. Raymond Seekell (University of Notre Dame) and Professional Scientific English Language from Elsevier (50038) for the manuscript preparation.

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Authors and Affiliations

  1. College of Environmental Science and Engineering, Nankai University, Tianjin, 300071, People’s Republic of China

    Sihui Zhan, Dandan Zhu, Shanshan Yang, Mingying Qiu & Hongbing Yu

  2. Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, 46556, USA

    Sihui Zhan

  3. Department of Chemistry, Tianjin University, Tianjin, 300072, People’s Republic of China

    Yi Li

  4. Key Laboratory of Risk Assessment and Control for Environment and Food Safety, Institute of Health and Environmental Medicine, Tianjin, 300050, China

    Zhiqiang Shen

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  1. Sihui Zhan
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  2. Dandan Zhu
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  3. Shanshan Yang
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  4. Mingying Qiu
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  5. Yi Li
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  6. Hongbing Yu
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  7. Zhiqiang Shen
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Correspondence to Sihui Zhan or Yi Li.

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Zhan, S., Zhu, D., Yang, S. et al. Sol-gel preparation of mesoporous cerium-doped FeTi nanocatalysts and its SCR activity of NOx with NH3 at low temperature. J Sol-Gel Sci Technol 73, 443–451 (2015). https://doi.org/10.1007/s10971-014-3556-5

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  • DOI: https://doi.org/10.1007/s10971-014-3556-5

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