Boron-modified Ce-Zr mixed oxide catalysts for improved low-temperature NOx reduction

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Letters Pub Date : 2024-11-22 DOI:10.1016/j.matlet.2024.137754

Wenhua Wang , Zhanpeng Luo , Qingji Ying , Xiaoqiang Wang

引用次数: 0

Abstract

This study explored the promotional effect of nanometal boron (B) modification on SCR performance over Ce-Zr (CZ) mixed oxide catalysts. Experimental results indicated that the optimal B_0.3CZ sample achieved over 90 % NO conversion and N₂ selectivity within 240–360 °C, whereas the pristine CZ sample failed to reach complete NO conversion across the same temperature range. Characterization studies revealed that boron addition formed interactions with Ce/Zr and heightened surface acid strength. Importantly, these interactions enhanced redox capacity and increased surface ratios of Ce³⁺ and O_β, thereby boosting low-medium SCR activity. Additionally, the strengthened surface acidity improved NH₃ adsorption, ensuring high N₂ selectivity at elevated temperatures. Overall, nonmetal boron modification might be one promising strategy for promoting catalytic performance in SCR systems.

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来源期刊

Materials Letters 工程技术-材料科学：综合

CiteScore

5.60

自引率

3.30%

发文量

1948

审稿时长

50 days

期刊介绍： Materials Letters has an open access mirror journal Materials Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Materials Letters is dedicated to publishing novel, cutting edge reports of broad interest to the materials community. The journal provides a forum for materials scientists and engineers, physicists, and chemists to rapidly communicate on the most important topics in the field of materials. Contributions include, but are not limited to, a variety of topics such as: • Materials - Metals and alloys, amorphous solids, ceramics, composites, polymers, semiconductors • Applications - Structural, opto-electronic, magnetic, medical, MEMS, sensors, smart • Characterization - Analytical, microscopy, scanning probes, nanoscopic, optical, electrical, magnetic, acoustic, spectroscopic, diffraction • Novel Materials - Micro and nanostructures (nanowires, nanotubes, nanoparticles), nanocomposites, thin films, superlattices, quantum dots. • Processing - Crystal growth, thin film processing, sol-gel processing, mechanical processing, assembly, nanocrystalline processing. • Properties - Mechanical, magnetic, optical, electrical, ferroelectric, thermal, interfacial, transport, thermodynamic • Synthesis - Quenching, solid state, solidification, solution synthesis, vapor deposition, high pressure, explosive