Microporous and Mesoporous Materials最新文献_第7页

Enhanced low-temperature activity and hydrothermal stability of Ru-modified Cu/SSZ-39 catalysts toward NH3-SCR reaction ru改性Cu/SSZ-39催化剂对NH3-SCR反应的低温活性和水热稳定性增强

IF 4.7 3区材料科学

Microporous and Mesoporous Materials Pub Date : 2026-02-15 Epub Date: 2025-12-09 DOI: 10.1016/j.micromeso.2025.113985

Amar Al-khawlani , Jiehua Bao , Zhuang Ran , Basheer M. Al-Maswari , Yiwei Zhang , Zhou Yuming

{"title":"Enhanced low-temperature activity and hydrothermal stability of Ru-modified Cu/SSZ-39 catalysts toward NH3-SCR reaction","authors":"Amar Al-khawlani , Jiehua Bao , Zhuang Ran , Basheer M. Al-Maswari , Yiwei Zhang , Zhou Yuming","doi":"10.1016/j.micromeso.2025.113985","DOIUrl":"10.1016/j.micromeso.2025.113985","url":null,"abstract":"<div><div>The development of hydrothermally stable catalysts with high low-temperature activity is essential for efficient NO<sub>x</sub> abatement in mobile and stationary sources. In this work, Cu-Ru<sub>x</sub>/SSZ-39 catalysts (x = 0.5, 1.0, 1.5 wt%) with a fixed Cu loading of 4 wt% were synthesized by impregnating Cu precursors onto Ru/SSZ-39 supports prepared via one-pot synthesis, and were systematically evaluated for the NH<sub>3</sub>-SCR reaction. Structural characterizations confirmed that moderate Ru incorporation preserved the AEI framework, improved the textural properties, and facilitated uniform dispersion of Cu species. H<sub>2</sub>-TPR and NH<sub>3</sub>-TPD results revealed that Ru significantly enhanced the reducibility of Cu<sup>2+</sup> species and increased the density of medium-strength acid sites, thereby accelerating low-temperature redox cycling and ammonia adsorption. Among the prepared catalysts, Cu-Ru<sub>1.0</sub>/SSZ-39 exhibited nearly complete NO<sub>x</sub> conversion across 150–260 °C, surpassing the Cu/SSZ-39 catalyst. Moreover, the optimized catalyst retained excellent structural integrity and activity, demonstrating superior stability. The enhanced performance is attributed to the synergistic Ru-Cu interactions that promote Cu dispersion, stabilize small CuO<sub>x</sub> clusters, and expand the operational temperature window. This study demonstrates that Ru pre-modification is an effective strategy for designing highly active and stable zeolite-based catalysts for practical low-temperature NO<sub>x</sub> removal.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"402 ","pages":"Article 113985"},"PeriodicalIF":4.7,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145734108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Vapor-phase ion-exchange – fast and efficient approach for deep cation-exchange in zeolites 气相离子交换——沸石中深层阳离子交换的快速有效方法

IF 4.7 3区材料科学

Microporous and Mesoporous Materials Pub Date : 2026-02-15 Epub Date: 2025-12-06 DOI: 10.1016/j.micromeso.2025.113983

Olga A. Ponomareva , Liudmila I. Rodionova , Andrey G. Popov , Ilya A. Kostyukov , Alexander I. Nikiforov , Irina V. Dobryakova , Olga V. Shutkina , Irina I. Ivanova

{"title":"Vapor-phase ion-exchange – fast and efficient approach for deep cation-exchange in zeolites","authors":"Olga A. Ponomareva , Liudmila I. Rodionova , Andrey G. Popov , Ilya A. Kostyukov , Alexander I. Nikiforov , Irina V. Dobryakova , Olga V. Shutkina , Irina I. Ivanova","doi":"10.1016/j.micromeso.2025.113983","DOIUrl":"10.1016/j.micromeso.2025.113983","url":null,"abstract":"<div><div>The conventional method of ion-exchange in zeolites is usually multistep, time-consuming, labour-intensive and producing wastes. Herein we report on the fast, efficient, waste-free, and technologically viable method of ion-exchange under vapor-phase conditions. The technique involves the incipient wetness impregnation of powdered or granulated zeolite samples with aqueous solution of corresponding salt followed by heating the sample at elevated temperatures in the range of 200–300 °C. The method can be performed in the autoclave under static conditions or in a fixed bed flow reactor under dynamic conditions. The advantages of the method are shown with an example of Na<sup>+</sup> to Cs<sup>+</sup> ion-exchange in zeolite Y. It is shown that the novel technique allows to reach the degrees of ion-exchange of up to 77 % in one step and up to 88 % in 3 steps, whereas the conventional ion-exchange technique in solution gives only 27 % in one step and 68 % in 5 steps. The method is shown to be amenable to various zeolite materials with different chemical composition and the size of crystals. The degree of ion-exchange depends on the number of exchange cycles, the Si/Al ratio and the size of the crystals.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"402 ","pages":"Article 113983"},"PeriodicalIF":4.7,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145734103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Activation of Prussian blue analogues: Temperature effects on structure, porosity, and open metal site accessibility 普鲁士蓝类似物的活化：温度对结构、孔隙度和开放金属位点可及性的影响

IF 4.7 3区材料科学

Microporous and Mesoporous Materials Pub Date : 2026-02-15 Epub Date: 2025-11-22 DOI: 10.1016/j.micromeso.2025.113959

Jelco Albertsma, Christel I. Koopman, Eise Draaijer, Willy Rook, David A. Vermaas, Monique A. van der Veen

{"title":"Activation of Prussian blue analogues: Temperature effects on structure, porosity, and open metal site accessibility","authors":"Jelco Albertsma, Christel I. Koopman, Eise Draaijer, Willy Rook, David A. Vermaas, Monique A. van der Veen","doi":"10.1016/j.micromeso.2025.113959","DOIUrl":"10.1016/j.micromeso.2025.113959","url":null,"abstract":"<div><div>Prussian blue analogues (PBAs) are low-cost porous materials with promising potential in gas separation, owing to their abundance of open metal sites. To access these open metal sites PBAs need to be activated through removal of water from the porous structure. However, the conditions required for effective activation and their structural consequences remain poorly understood, with existing effective methods being costly. Therefore, to gain insights in the activation process and its effects on structure, we systematically investigated the effect of activation temperature on three different ferricyanide-based PBAs (FePBA, CoPBA, and CuPBA) using a simple nitrogen flow activation procedure. We successfully synthesised these structures and optimised the activation procedure for micropore capacity and crystallinity. Infrared spectroscopy as well as CO<sub>2</sub> and CO adsorption measurements revealed that, even under optimised conditions, water remained within the PBAs, with only a limited number of open metal sites accessible. At higher activation temperatures, micropore capacity and crystallinity decrease. This hydrophilicity, however, also showed positives, for example in the application of PBAs as desiccants. CuPBA, specifically, boasts a water adsorption of 355 mg g<sup>−1</sup> at a relative humidity of ≤10%, competitive with zeolites and silica per weight unit, but higher per volume unit. Overall, however, while PBAs offer promise for gas adsorption owing to their high surface area and low cost, practical utilisation of their open metal sites remains challenging due to their strong affinity for water.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"402 ","pages":"Article 113959"},"PeriodicalIF":4.7,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145682703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Iron-based Metal–Organic Frameworks as efficient adsorbents for wastewater remediation: Insight into mechanistic, ecotoxicological and disposal concerns 铁基金属有机框架作为废水修复的有效吸附剂：对机械，生态毒理学和处理问题的见解

IF 4.7 3区材料科学

Microporous and Mesoporous Materials Pub Date : 2026-02-15 Epub Date: 2025-11-27 DOI: 10.1016/j.micromeso.2025.113945

Sneh Lata , Nasreen Ghazi Ansari

{"title":"Iron-based Metal–Organic Frameworks as efficient adsorbents for wastewater remediation: Insight into mechanistic, ecotoxicological and disposal concerns","authors":"Sneh Lata , Nasreen Ghazi Ansari","doi":"10.1016/j.micromeso.2025.113945","DOIUrl":"10.1016/j.micromeso.2025.113945","url":null,"abstract":"<div><div>Water is vital to flourishing life on Earth, and it has been facing severe issues due to various contaminants in water bodies. The emergence of globalization and industrialization in the future highlights the need for creative and effective wastewater cleanup solutions. Metal-organic frameworks are emerging as a promising solution because of their unique properties and adaptability. Furthermore, the availability of iron through natural and biological means makes it a more economical, sustainable, and less toxic alternative to other metals for MOF design. Moreover, metal-organic framework with Fe as a metallic node show excellent tunability, high porosity, functionality, and diverse topologies, making them ideal for wastewater remediation. Their structural characteristics are customized to showcase their applicability in several thorough assessments. This primer thoroughly explains the synthesis process, structural properties with topological identifiers, the adsorption mechanism, and applications. Nonetheless, this comprehensive discussion considers the limitations of the structural integrity of Fe-MOF and the possibility of large-scale commercialisation by evaluating their safety assessment and disposal plan. This review article also offers a complete approach to quantum mechanics and molecular modelling for a thorough understanding of Fe-MOF design, which forecasts corrective steps for commercialisation and industrial applications. In a nutshell, Fe-MOF's potential in wastewater remediation offers hope for a cleaner environment.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"402 ","pages":"Article 113945"},"PeriodicalIF":4.7,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145682701","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ligand engineering in MIL-101(Cr) for enhanced CO2 cycloaddition: the dominant role of carboxyl over amino functionalization MIL-101（Cr）中增强CO2环加成的配体工程：羧基对氨基功能化的主导作用

IF 4.7 3区材料科学

Microporous and Mesoporous Materials Pub Date : 2026-02-15 Epub Date: 2025-11-27 DOI: 10.1016/j.micromeso.2025.113965

Ziyang Xu, Zicheng Yang, Jiale Ni, Yi Feng, Jianfeng Yao

{"title":"Ligand engineering in MIL-101(Cr) for enhanced CO2 cycloaddition: the dominant role of carboxyl over amino functionalization","authors":"Ziyang Xu, Zicheng Yang, Jiale Ni, Yi Feng, Jianfeng Yao","doi":"10.1016/j.micromeso.2025.113965","DOIUrl":"10.1016/j.micromeso.2025.113965","url":null,"abstract":"<div><div>The functionalization of metal organic frameworks (MOFs) with tailored ligands offers a promising pathway for enhancing their catalytic performance in CO<sub>2</sub> fixation. This work systematically explores the impact of ligand engineering in MIL-101(Cr) through carboxyl (–COOH) and amino (–NH<sub>2</sub>) functionalization for the CO<sub>2</sub> cycloaddition reaction. Comprehensive characterizations of pristine MIL-101 and functionalized MILs involving MIL-101-COOH, MIL-101-NH<sub>2</sub>, and MIL-101-COOH/NH<sub>2</sub> reveal that –COOH functionalization significantly enhances the surface area (2717 m<sup>2</sup>/g) and reduces the activation energy (17.1 kJ/mol vs. 23.1 kJ/mol for pristine MIL-101), whereas –NH<sub>2</sub> groups improve the CO<sub>2</sub> binding strength but compromise the crystallinity and surface area (532 m<sup>2</sup>/g). Under mild conditions (80 °C and 0.1 MPa CO<sub>2</sub>), MIL-101-COOH achieves >99 % yield for CO<sub>2</sub> cycloaddition with epichlorohydrin at 8 h and maintains stability over ten cycles, outperforming other MILs (72–82.5 % yields). This work establishes ligand engineering, especially –COOH functionalization, as a critical strategy to optimize MILs for CO<sub>2</sub> fixation to produce cyclic carbonates.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"402 ","pages":"Article 113965"},"PeriodicalIF":4.7,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145617185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Novel zeolite framework LMU-2: unveiling of CHA-related structure with active sites by Co-complex structure-directing agent 新型沸石骨架LMU-2：用协同配合物结构导向剂揭示具有活性位点的cha相关结构

IF 4.7 3区材料科学

Microporous and Mesoporous Materials Pub Date : 2026-02-15 Epub Date: 2025-11-26 DOI: 10.1016/j.micromeso.2025.113960

Janina Carolin Höner , Andreas Schaate , Andreas M. Schneider , Jonas Blaser , Hubert Koller , Yaşar Krysiak , Peter Behrens

{"title":"Novel zeolite framework LMU-2: unveiling of CHA-related structure with active sites by Co-complex structure-directing agent","authors":"Janina Carolin Höner , Andreas Schaate , Andreas M. Schneider , Jonas Blaser , Hubert Koller , Yaşar Krysiak , Peter Behrens","doi":"10.1016/j.micromeso.2025.113960","DOIUrl":"10.1016/j.micromeso.2025.113960","url":null,"abstract":"<div><div>While alkylammonium salts or organic amines are commonly used as structure-directing agents (SDAs) to synthesize zeolites, metal complexes can also serve this purpose. In this study, we present a novel interrupted framework, which can be regarded as a precursor of the CHA framework type with a pure-silica composition. The polycrystalline yellow powder was synthesized using a cobalt (III)-triazacyclononane complex [Co(<em>tacn</em>)<sub>2</sub>]<sup>3+</sup>. Structure determination via 3D electron diffraction revealed details of the [Si–O⋅⋅⋅H⋅⋅⋅O–Si]<sup>–</sup> hydrogen bonds, which are periodically ordered. They connect the D6R units of the CHA precursor-type structure. Upon calcination, the organic component is removed, yielding a blue material, resulting in the fully connected chabazite structure. The blue color is characteristic for tetrahedrally coordinated Co<sup>2+</sup>, which is most likely located in the chabazite cage and coordinated to the 6-rings of the framework. Temperature-dependent powder diffraction analysis was used to investigate the structural transformation and the discontinuous decrease in the constants <em>a</em> and <em>c</em> of the hexagonal lattice. Finally, spectroscopic and sorption measurements were conducted to characterize the properties of the material.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"402 ","pages":"Article 113960"},"PeriodicalIF":4.7,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145682637","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimising the structure of mesoporous niobium oxide using evaporation-induced self-assembly synthesis method 蒸发诱导自组装法优化介孔氧化铌的结构

IF 4.7 3区材料科学

Microporous and Mesoporous Materials Pub Date : 2026-02-15 Epub Date: 2025-12-19 DOI: 10.1016/j.micromeso.2025.113994

Peter Nadrah , Mateja Knap , Erika Švara Fabjan , Andraž Šuligoj , Urška Lavrenčič Štangar , Goran Dražić , Nataša Novak Tušar , Andrijana Sever Škapin

{"title":"Optimising the structure of mesoporous niobium oxide using evaporation-induced self-assembly synthesis method","authors":"Peter Nadrah , Mateja Knap , Erika Švara Fabjan , Andraž Šuligoj , Urška Lavrenčič Štangar , Goran Dražić , Nataša Novak Tušar , Andrijana Sever Škapin","doi":"10.1016/j.micromeso.2025.113994","DOIUrl":"10.1016/j.micromeso.2025.113994","url":null,"abstract":"<div><div>To increase the photocatalytic performance of Niobium(V) oxide (Nb<sub>2</sub>O<sub>5</sub>) it is necessary to increase its accessible surface area. The evaporation-induced self-assembly (EISA) synthesis method is well suited for the synthesis of mesoporous structures, but the optimisation of synthesis parameters for Nb<sub>2</sub>O<sub>5</sub> is still limited. In this study, we demonstrate that the synthesis parameters — duration of evaporation, airflow rate, relative humidity and water content in the reaction mixture — significantly affect the specific surface area, mesoporous structure and photocatalytic performance of isopropanol oxidation into acetone of Nb<sub>2</sub>O<sub>5</sub>. Our results show that a combination of long evaporation duration, low airflow rate, low relative humidity and moderate water content are needed to obtain material with the highest specific surface area (145 m<sup>2</sup> g<sup>−1</sup>) and a narrow hysteresis loop in the N<sub>2</sub> sorption isotherm. This material exhibits four times higher photocatalytic activity compared to materials synthesised under less favourable conditions (14.3–17.7 μmol h<sup>−1</sup> compared to 3.7 μmol h<sup>−1</sup>). We also show that the ordered mesoporous structure plays an important role in improving the photocatalytic performance: the materials with a higher degree of order exhibit about two times higher activity than the materials with a lower degree of order with the same specific surface area (10.4–12.1 μmol h<sup>−1</sup> compared to 4.9–7.9 μmol h<sup>−1</sup>). These results provide valuable insights for optimising the synthesis of mesoporous niobium oxide to increase both the specific surface area and photocatalytic performance.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"402 ","pages":"Article 113994"},"PeriodicalIF":4.7,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145787339","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of the CeO2 addition on the CuO/SBA-15 adsorbent performance for a DeSOx process under wet conditions 湿条件下CeO2添加量对DeSOx工艺中CuO/SBA-15吸附性能的影响

IF 4.7 3区材料科学

Microporous and Mesoporous Materials Pub Date : 2026-02-15 Epub Date: 2025-12-10 DOI: 10.1016/j.micromeso.2025.113990

G. Guicheney , S. Dorge , H. Nouali , B. Lebeau , Philippe Fioux , M. Soulard , J. Patarin , M. Molière , M. Vierling , A.C. Houdon , J.F. Brilhac

引用次数: 0

Trace-loaded MOF-801 mixed-matrix monolith for selective adsorption of alkane over alkene in binary gas mixtures 痕量负载MOF-801混合基质单体在二元气体混合物中选择性吸附烷烃

IF 4.7 3区材料科学

Microporous and Mesoporous Materials Pub Date : 2026-02-15 Epub Date: 2025-12-01 DOI: 10.1016/j.micromeso.2025.113976

Alaa Bin Shuqayr , Sadeem Bin Tuwaym , Mostafa Zeama , Rawan AL Natour , Osama Shekhah , Mohamed Eddaoudi , Zeid A. Alothman , Kareem Y. Mahmoud

{"title":"Trace-loaded MOF-801 mixed-matrix monolith for selective adsorption of alkane over alkene in binary gas mixtures","authors":"Alaa Bin Shuqayr , Sadeem Bin Tuwaym , Mostafa Zeama , Rawan AL Natour , Osama Shekhah , Mohamed Eddaoudi , Zeid A. Alothman , Kareem Y. Mahmoud","doi":"10.1016/j.micromeso.2025.113976","DOIUrl":"10.1016/j.micromeso.2025.113976","url":null,"abstract":"<div><div>The separation of light alkane/alkene mixtures remains a central challenge in petrochemical processing, especially under mild conditions where traditional energy-intensive approaches such as cryogenic distillation are impractical. Here, we report a mixed-matrix monolithic composite (MMMo) comprising only 0.5 wt% MOF-801 nanoparticles embedded in a divinylbenzene (DVB) matrix, synthesized via in situ capillary polymerization. Despite the trace MOF loading, the composite exhibits an unusual and dual thermodynamic selectivity for ethane over ethylene (α = 1.49, R<sub>s</sub> = 0.87 at 0 °C) and propane over propylene (α = 1.19, R<sub>s</sub> = 0.40 at 25 °C)—a rare feature among porous materials.</div><div>Using inverse gas chromatography (IGC), we quantified the thermodynamic parameters governing gas–solid interactions, revealing stronger adsorption enthalpies for alkanes (up to 49.6 kJ mol<sup>−1</sup> for propane) and a clear enthalpy–entropy compensation across the alkane series. Polar probe analysis revealed a mildly basic surface character and dominant dispersive interactions, further supporting the preference for alkanes. Importantly, the composite retained excellent structural integrity and selectivity under extended operation and increasing gas concentrations, confirming its robustness.</div><div>These findings position the MOF-801@DVB MMMo as a scalable and energy-efficient platform for selective gas separations, offering rare dual selectivity within a monolithic architecture and opening new avenues for low-pressure, thermodynamically governed hydrocarbon purification.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"402 ","pages":"Article 113976"},"PeriodicalIF":4.7,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145682705","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cu-LTL zeolite: an excellent high-temperature NH3-SCR catalyst with simple synthesis Cu-LTL沸石：一种合成简单、性能优异的高温NH3-SCR催化剂

IF 4.7 3区材料科学

Microporous and Mesoporous Materials Pub Date : 2026-02-15 Epub Date: 2025-12-06 DOI: 10.1016/j.micromeso.2025.113980

Jialing Chen , Sibo Zhang , Tingyu Liang , Xiaoxiao Guan , Lijun Lu , Tingting Li , Tengcheng Cui , Jixuan Wu , Li Guo , Lan Yi , Xiaoqin Wu , Anmin Zheng

{"title":"Cu-LTL zeolite: an excellent high-temperature NH3-SCR catalyst with simple synthesis","authors":"Jialing Chen , Sibo Zhang , Tingyu Liang , Xiaoxiao Guan , Lijun Lu , Tingting Li , Tengcheng Cui , Jixuan Wu , Li Guo , Lan Yi , Xiaoqin Wu , Anmin Zheng","doi":"10.1016/j.micromeso.2025.113980","DOIUrl":"10.1016/j.micromeso.2025.113980","url":null,"abstract":"<div><div>For the first time, Cu-LTL zeolite (with Cu content of 2.9 wt% and Si/Al = 4.8) is found to be an excellent high-temperature NH<sub>3</sub>-SCR catalyst with higher than 80 % NO<sub>x</sub> conversion at 294–664 °C under a GHSV of ca. 54000 h<sup>−1</sup>, which may be potential in the NH<sub>3</sub>-SCR process for high-temperature flue gas field. Cu-LTL zeolite in this work was prepared with low-cost by hydrothermal method without using organic structure-directing agents and Cu was introduced by simple incipient wetness impregnation method. Comparing with commercial Cu-SSZ-13 zeolite with similar Cu content (2.7 wt%), Cu-LTL shows inferior low-temperature (<400 °C) activity while much better high-temperature (450–700 °C) activity in NH<sub>3</sub>-SCR. Detailed characterization demonstrate that the poorer NH<sub>3</sub>-SCR activity of Cu-LTL than Cu-SSZ-13 at low temperatures (<400 °C) are attributed to its lower ability to adsorb and activate NH<sub>3</sub> and NO molecules due to its lower acid strength, lower content of [Cu(OH)]<sup>+</sup> and Cu<sup>+</sup> species, while the high NH<sub>3</sub>-SCR activity of Cu-LTL at 450–700 °C are ascribed to the special distribution of Cu species in LTL zeolite, which are mainly in the form of isolated Cu<sup>2+</sup> species, with negligible content of [Cu-O-Cu]<sub>n</sub> species and with low accessibility of CuO<sub>x</sub> species due to severe micropore blockage of one-dimensional LTL framework. Therefore, the ammonia oxidation side reactions in Cu-LTL are largely suppressed to ensure the excellent NH<sub>3</sub>-SCR activities at high temperatures.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"402 ","pages":"Article 113980"},"PeriodicalIF":4.7,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145734051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0