新型介孔CeVWOx/TiO2纳米片用于NH3选择性催化还原NO

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

{"title":"新型介孔CeVWOx/TiO2纳米片用于NH3选择性催化还原NO","authors":"Shihao Li , Mengli Han , Youlin Liu , Ronghai Zhang , Xu Wang , Jianhai Wang , Sasa Gu , Yuesong Shen","doi":"10.1016/j.jre.2024.07.028","DOIUrl":null,"url":null,"abstract":"<div><div>Herein, we report the self-sacrificial template strategy to design mesoporous layered CeVWOx/TiO2 catalysts for the selective catalytic reduction of NO by NH3 (NH3-SCR). As-fabricated CeVWOx/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 CeVWOx/TiO2 catalysts exhibit excellent SCR activity with the NOx conversion of over 90% between 210 and 470 °C. Meanwhile, CeVWOx/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 CeVWOx/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 CeVWOx/TiO2 at low temperature. This work offers a facile strategy to design and fabricate efficient 2D deNOx catalyst.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"43 3","pages":"Pages 500-507"},"PeriodicalIF":5.2000,"publicationDate":"2024-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Novel mesoporous CeVWOx/TiO2 nanosheets for selective catalytic reduction of NO by NH3\",\"authors\":\"Shihao Li , Mengli Han , Youlin Liu , Ronghai Zhang , Xu Wang , Jianhai Wang , Sasa Gu , Yuesong Shen\",\"doi\":\"10.1016/j.jre.2024.07.028\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Herein, we report the self-sacrificial template strategy to design mesoporous layered CeVWOx/TiO2 catalysts for the selective catalytic reduction of NO by NH3 (NH3-SCR). As-fabricated CeVWOx/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 CeVWOx/TiO2 catalysts exhibit excellent SCR activity with the NOx conversion of over 90% between 210 and 470 °C. Meanwhile, CeVWOx/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 CeVWOx/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 CeVWOx/TiO2 at low temperature. This work offers a facile strategy to design and fabricate efficient 2D deNOx catalyst.</div></div>\",\"PeriodicalId\":16940,\"journal\":{\"name\":\"Journal of Rare Earths\",\"volume\":\"43 3\",\"pages\":\"Pages 500-507\"},\"PeriodicalIF\":5.2000,\"publicationDate\":\"2024-07-30\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Rare Earths\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1002072124002680\",\"RegionNum\":1,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, APPLIED\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Rare Earths","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1002072124002680","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, APPLIED","Score":null,"Total":0}

引用次数: 0

摘要

本文采用自我牺牲模板策略设计介孔层状CeVWOx/TiO2催化剂，用于NH3选择性催化还原NO。通过溶剂热法合成Ce、ti - mof，并在Ce、ti - mof中浸渍钒、钨，再经过高温煅烧工艺，成功制备出具有独特介孔层状结构的CeVWOx/TiO2催化剂。作为NH3-SCR催化剂，设计良好的CeVWOx/TiO2催化剂在210 ~ 470℃范围内具有优异的SCR活性，NOx转化率超过90%。同时，CeVWOx/TiO2对水蒸气和SO2的耐受性较好。CeVWOx/TiO2纳米片具有独特的介孔层状纳米结构、表面酸性、可调还原性、活性以及活性金属氧化物与载体的强相互作用等特点，有助于提高SCR性能。原位漫反射红外傅立叶变换光谱（DRIFTS）分析表明，CeVWOx/TiO2在低温下表面存在Langmuir-Hinshelwood （L-H）和Eley-Rideal （E-R）机制。这项工作为设计和制造高效的二维脱氧催化剂提供了一种简便的策略。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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

查看原文本刊更多论文

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

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.

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

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.