Novel mesoporous CeVWOx/TiO2 nanosheets for selective catalytic reduction of NO by NH3

IF 5.2 1区化学 Q1 CHEMISTRY, APPLIED

Journal of Rare Earths Pub Date : 2024-07-30 DOI:10.1016/j.jre.2024.07.028

Shihao Li , Mengli Han , Youlin Liu , Ronghai Zhang , Xu Wang , Jianhai Wang , Sasa Gu , Yuesong Shen

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引用次数: 0

Abstract

Herein, we report the self-sacrificial template strategy to design mesoporous layered CeVWO_x/TiO₂ catalysts for the selective catalytic reduction of NO by NH₃ (NH₃-SCR). As-fabricated CeVWO_x/TiO₂ catalysts with unique mesoporous and layered structure were successfully prepared through the synthesis of Ce,Ti-MOFs by solvothermal method, the impregnation of vanadium and tungsten in Ce,Ti-MOFs and high temperature calcination process. As NH₃-SCR catalysts, well-designed CeVWO_x/TiO₂ catalysts exhibit excellent SCR activity with the NO_x conversion of over 90% between 210 and 470 °C. Meanwhile, CeVWO_x/TiO₂ shows superior tolerance to water vapor and SO₂. The features of unique mesoporous layered nanostructure, surface acidity, tunable reducibility, active and the strong interaction of active metal oxide and support in CeVWO_x/TiO₂ nanosheets should contribute to the improved SCR performance. In situ diffuse reflection infrared Fourier transform spectroscopy (DRIFTS) analysis indicates that both Langmuir–Hinshelwood (L-H) and Eley-Rideal (E-R) mechanisms are present on the surface of CeVWO_x/TiO₂ at low temperature. This work offers a facile strategy to design and fabricate efficient 2D deNO_x catalyst.

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来源期刊

Journal of Rare Earths 化学-应用化学

CiteScore

8.70

自引率

14.30%

发文量

374

审稿时长

1.7 months

期刊介绍： The Journal of Rare Earths reports studies on the 17 rare earth elements. It is a unique English-language learned journal that publishes works on various aspects of basic theory and applied science in the field of rare earths (RE). The journal accepts original high-quality original research papers and review articles with inventive content, and complete experimental data. It represents high academic standards and new progress in the RE field. Due to the advantage of abundant RE resources of China, the research on RE develops very actively, and papers on the latest progress in this field emerge every year. It is not only an important resource in which technicians publish and obtain their latest research results on RE, but also an important way of reflecting the updated progress in RE research field. The Journal of Rare Earths covers all research and application of RE rare earths including spectroscopy, luminescence and phosphors, rare earth catalysis, magnetism and magnetic materials, advanced rare earth materials, RE chemistry & hydrometallurgy, RE metallography & pyrometallurgy, RE new materials, RE solid state physics & solid state chemistry, rare earth applications, RE analysis & test, RE geology & ore dressing, etc.