Journal of Materials Chemistry A最新文献

{"title":"Anion-Regulating Separator for Simultaneous Control of electrode–electrolyte and Li+ Transport in Stable Lithium Metal Batteries","authors":"Yuanzhe Piao,Jimin Ham,Yujin Chang,Yonghwan Kim,Ji Hoon Kim,Kyurim Kim,Youngseo Kim,Chan Young Oh,Injoo Sun,Taeyoung Jung,Minjun Bae","doi":"10.1039/d6ta04595b","DOIUrl":"https://doi.org/10.1039/d6ta04595b","url":null,"abstract":"Lithium metal batteries (LMBs) have attracted significant attention as next-generation energy storage systems owing to their potential to deliver ultra-high energy density when paired with Ni-rich layered oxide cathodes. However, the practical deployment of LMBs remains severely hindered by instability of electrode-electrolyte interphases (EEIs) caused by severe electrode cross-talk, non-uniform dendritic Li growth as well as the low oxidation stability of the cathode.In this work, we utilize an anion immobilization strategy to modulate the solvation structure of Li + , which results in robust LiF-rich EEIs on both anode and cathode to stabilize the operation of LMBs. To achieve this, we introduce carbon nanotubes coated by fluorinated copper polyphthalocyanines (F-CuPc) as a multifunctional EEI regulator on polypropylene (PP) separators (F-CuPc@CNT@PP). The strong electrophilicity of Cu 2+ center of F-CuPc promotes the creation of localized anion-enriched interphases, resulting in the formation of LiF-rich EEIs on both anode and cathode. Moreover, the continuous CNT network reduces ion-transport heterogeneity and suppresses local current density hotspots, enabling uniform Li + flux.Collectively, these effects suppress interfacial parasitic reactions, reinforce the interfacial stability of Ni-rich cathode, and enable highly reversible Li plating/stripping. As a result, the F-CuPc@CNT@PP separator successfully addresses multifaceted challenges of LMBs paired with Ni 0.8 Co 0.1 Mn 0.1 O 2 , achieving the cycling stability for over 300 cycles under high-voltage operation up to 4.5 V across a wide temperature range.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"12 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2026-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149152044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sustainable One-Pot Hydrothermal Engineering of Pine-Needle-Derived Hydrochar Integrated with Mono- and Trimetallic Oxides for Ultrafast Visible-Light-Driven Photocatalytic Degradation of Atrazine: Experimental, Theoretical, and Toxicity Investigations","authors":"Rishika Rishika,Shivangi Garg,Manish Kumar,Subhash Sharma,Rajesh Kumar,Santosh Kumar","doi":"10.1039/d6ta05136g","DOIUrl":"https://doi.org/10.1039/d6ta05136g","url":null,"abstract":"Biowaste-derived multifunctional materials integrated with transition-metal oxides are emerging as sustainable photocatalysts owing to their tunable electronic properties, high catalytic activity, and environmental benignity. Herein, lignocellulosic pine-needle waste was valorized through a one-pot hydrothermal carbonization strategy to fabricate mono- and trimetallic oxide-functionalized hydrochar composites, namely Fe@HC, Co@HC, Ti@HC, and Fe-Co-Ti@HC. Comprehensive physicochemical characterization (UV–vis, FT-IR, Raman, FE-SEM/EDS, P-XRD, XPS, EIS and BET analyses) confirmed the successful incorporation of metal oxide species within the hierarchical porous hydrochar framework. The synthesized materials were assessed as visible-light-responsive adsorbent-photocatalysts for atrazine (ATRZ) degradation in the presence of peroxymonosulfate (PMS) initiator. Among all systems, Fe-Co-Ti@HC exhibited excellent photocatalytic performance, achieving 93.25% ATRZ degradation within 40 min under optimized conditions (20 ppm ATRZ, 0.4 g L⁻¹ catalyst dosage, pH 4), whereas Fe@HC, Co@HC, and Ti@HC afforded comparatively lower degradation efficiencies. The enhanced activity of Fe-Co-Ti@HC is attributed to synergistic metal-metal and metal-carbon interactions, improved charge separation, and increased density of surface-active sites. Kinetic investigations followed pseudo-second-order behavior, indicating dominant surface-mediated photocatalytic processes. The trimetallic photocatalyst also demonstrated excellent recyclability over seven consecutive cycles with negligible loss in activity. In addition, Density functional theory (DFT) calculations revealed stronger ATRZ adsorption and favourable electronic interactions in the Fe-Co-Ti@HC system, corroborating the experimental findings. Toxicity assessment using ECOSAR and brine shrimp lethality bioassay indicated reduced toxicity of degradation products after treatment. Overall, this study presents a sustainable strategy for converting pine-needle waste into efficient multifunctional photocatalysts for environmental remediation.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"32 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2026-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149152045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"LiSbCl6: A Missing Piece in the Framework Diversity of Lithium Halides with Limited Substitution Tolerance","authors":"Paul L Eckert,Souvik Giri,Jon Serrano-Sevillano,Wiebke Zielasko,Clemens Ritter,Michael Ryan Hansen,Wolfgang Zeier,Xabier Martinez De Irujo Labalde","doi":"10.1039/d6ta06558a","DOIUrl":"https://doi.org/10.1039/d6ta06558a","url":null,"abstract":"Lithium halide solid electrolytes have recently attracted renewed attention due to their electrochemical stability, mechanical compliance, and tunable ionic transport properties. Most lithium halides reported as fast-ion conductors are based on close-packed anion frameworks, in which cubic or hexagonal packing governs lithium sublattice connectivity. In light of this apparent structural convergence, the question may be raised as to whether all relevant framework types have already been identified. In this work, LiSbCl6 is experimentally realized as a previously unreported member of the close-packed lithium halide family. LiSbCl6 adopts a hexagonal close-packed anion framework with a peculiar cation arrangement, characterized by fully vacant octahedral layers alternating with cation-containing layers. The ordering of Sb(+V) and Li+ gives rise to a one-dimensional lithium-ion diffusion channel along the stacking direction. However, LiSbCl6 exhibits a very low ionic conductivity that cannot be significantly enhanced by mechanochemical post-treatment, indicating strong lithium localization within the layers. Aliovalent substitution of Sb(+V) by Zr(+IV) introduces additional lithium and induces systematic structural modifications, enhancing lithium-ion transport through increased pathway connectivity and, at higher substitution levels, a transition to higher-dimensional diffusion networks. The identification of LiSbCl6 as a missing framework motif is expected to stimulate further exploration of unconventional lithium halide structures and inspire new strategies for solid electrolyte design.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"87 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2026-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149152046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of Solid-State Battery Degradation on Direct Recycling of Li 6 PS 5 Cl: Structure, Transport, and Electrochemical Properties","authors":"Thao Kim Truong,Jake Huang,Xabier Martinez De Irujo Labalde,Wiebke Zielasko,Bianca Helm,Marvin A Kraft,Paul Till,Alexander Soboloev,E. Suard,Michael Ryan Hansen,Wolfgang Zeier","doi":"10.1039/d6ta05507a","DOIUrl":"https://doi.org/10.1039/d6ta05507a","url":null,"abstract":"Solid-state batteries are a promising next-generation energy storage technology, offering the potential for enhanced safety and performance compared to conventional lithium-ion batteries.Because solid-state batteries rely on critical materials, establishing effective recycling strategies is essential to mitigate resource constraints and support the sustainable development of this technology. However, recycling studies on solid-state batteries remain scarce and are largely limited to proof-of-concept experiments rather than recovery of materials from spent battery cells.In particular, the influence of practical cell degradation on the recyclability and functional properties of recycled solid electrolytes remains poorly understood. In this work, we investigate ethanol-based direct recycling of the argyrodite solid electrolyte Li6PS5Cl from aged solid-state batteries. Li6PS5Cl is recovered from spent cells subjected to calendar aging protocols of varying severity. The recycled materials are compared with pristine and ethanol-treated references, revealing that degradation at the NCM83-Li6PS5Cl interface in spent solid-state cells has a profound impact on the structural, transport, and electrochemical properties of the recycled solid electrolytes. Notably, despite similar ionic conductivities at 25 °C, solid electrolytes subjected to different protocols exhibit considerable variations in cell performance, highlighting the critical role of the cathodeelectrolyte interface.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"8 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2026-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149152047","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"interfacial growth of cyano-containing COF/BiOBr heterojunctions for boosted photocatalytic hydrogen evolution and dye degradation","authors":"Tawanwit Luangwanta,Islam M. A. Mekhemer,Ahmed F. H. Selim,Khanh Do Gia Huynh,Dung Chau Kim Hoang,Jayachandran Jayakumar,Swatilekha Pratihar,Athis Watwiangkham,Dalia M. Dorrah,Tse-Fu Huang,Wei-Cheng Lin,Kuang-Hao Cheng,Siriporn Jungsuttiwong,Sulawan Kaowphong,Ho-Hsiu Chou","doi":"10.1039/d6ta03111k","DOIUrl":"https://doi.org/10.1039/d6ta03111k","url":null,"abstract":"Constructing heterojunction photocatalysts with well-matched band structures is an effective strategy to enhance photocatalytic performance. However, simultaneously achieving efficient interfacial charge transfer and preserved redox potential without intentionally added noble-metal co-catalysts remains challenging. This difficulty arises because many heterojunctions are fabricated via post-assembly processes that lead to weak interfacial contact and often rely on noble metals with high cost and limited elemental abundance to attain high activity. Herein, we report an in situ interfacial growth strategy to construct cyano-functionalized covalent organic framework/BiOBr (TpCN COF/BiOBr) heterojunctions with intimate interfacial contact. The resulting heterojunctions exhibit efficient visible-light-driven hydrogen evolution and methylene blue degradation without intentionally added noble-metal co-catalysts. Compared with the corresponding TpCN COF/BiOCl and TpCN COF/BiOI systems, the optimized TpCN COF/BiOBr demonstrates significantly enhanced photocatalytic performance, achieving multi-fold improvements in both hydrogen evolution and dye degradation efficiency. Notably, simultaneous hydrogen evolution during dye degradation is achieved. Mechanistic investigations support an S-scheme charge-transfer pathway in the TpCN COF/BiOBr heterojunction, enabling efficient charge separation and strong redox ability through intimate interfacial contact and favorable band alignment. This work provides a viable strategy for designing COF-based S-scheme heterojunctions for integrated solar hydrogen production and pollutant degradation under visible light.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"32 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2026-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149152053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Multistimuli-responsive Triazolyl-functionalized Terpyridyl based Mechanically Resilient Cu(II)-Metallogel as Platform for High Performance Intelligent Flexible Micro-supercapacitor","authors":"Poulami Panja,Sudip Ghorai,Sanghamitra Das,Nikita Dey,Sanjib K Patra","doi":"10.1039/d6ta06065j","DOIUrl":"https://doi.org/10.1039/d6ta06065j","url":null,"abstract":"Multistimuli-responsive self-healable supramolecular metallogels that couple mechanical adaptability with electrochemical functionality are promising candidates for next-generation flexible energy storage systems. Herein, we report a Cu(II)-based supramolecular metallogel via coordination-driven self-assembly of triazolyl-functionalized terpyridyl based low molecular weight gelator (LMWG) ligands with Cu(II) salts in MeOH/H 2 O (4:1), generating a fibrous, thixotropic network with pronounced viscoelastic resilience. The Cu(II)-based metallogels exhibited a pronounced viscoelastic behavior with dominant G′ as higher as 225 Pa over G′′ of 25 Pa along with a well-defined yield point leading to gel-sol transition highlighting their robust yet tunable network stability and mechanical responsiveness. All the Cu(II)-based metallogels were subsequently evaluated as solid state electrolytes in screen-printed planar micro-supercapacitors (1.4 cm 2 ), among which the optimized CuO (M/L = 1:2) metallogel delivered the best electrochemical performances, exhibiting an areal capacitance of 119.4 mF cm ⁻2 with low chargetransfer resistance and a maximum retention of 93% over 2000 cycles. Stable electrochemical signatures are preserved under bending (0-90°), and the device remains operational after repeated deformation (~43% retention after 100 cycles), revealing that the supramolecular Cu(II)-based metallogel can act as a promising candidate for pseudocapactive micro-supercapacitor.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"238 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2026-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149152048","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Visualising redox-driven metal-oxide interface dynamics in Ni/GDC electrodes <i>via in situ</i> Auger-Meitner electron microscopy.","authors":"Christian Melcher, Andreas Nenning, Stanislaus Breitwieser, Kirsten Rath, Luca Balice, Jonathan Rollenitz, Martin Bram, Christoph Rameshan, Alexander Karl Opitz","doi":"10.1039/d6ta04877c","DOIUrl":"10.1039/d6ta04877c","url":null,"abstract":"<p><p>Metal/oxide interfaces play a decisive role in both high-temperature electrochemical energy conversion using solid oxide cells (SOCs) and heterogeneous catalysis. However, their morphological stability under dynamic redox conditions remains poorly understood. In the present work, we investigate model electrodes of Ni/GDC (GDC = Gd-doped ceria = Gd_0.1Ce_0.9O_2-<i>δ</i> ) composites in thin-film and porous form. Electrochemical polarization of these electrodes enables electrochemical control of the oxygen chemical potential in ceria and thus provides direct experimental access to redox-driven interface dynamics independent of the gas-phase composition. While morphological degradation in Ni/GDC is often discussed in the context of electrochemical polarization, the underlying driving forces are more general and arise from changes in local oxygen chemical potential, metal oxidation state, and oxide defect chemistry. In this study, we present a multi-method fundamental analysis that enables well-defined control of the oxygen chemical potential in ceria while simultaneously resolving surface chemistry and morphology of Ni/GDC. By combining the in-house developed Electrochemical oXygen Activity ConTrol (EXACT) method with <i>in situ</i> Auger-Meitner electron microscopy (AMEM), we directly visualize redox-driven interface dynamics over an exceptionally wide effective <i>p</i>O₂ range. The results on the studied Ni/ceria system clearly show that upon consecutive oxidation and reduction of Ni and NiO (redox-cycling), dewetting - one of the main degradation mechanisms in solid oxide cells - is strongly accelerated. Notably, formation of only a thin NiO interface layer is sufficient to trigger this destabilization, without requiring full oxidation of Ni. However, while conditions are kept more reducing than the Ni/NiO threshold, Ni remains morphologically stable, even though the effective <i>p</i>O₂ varies by more than 10 orders of magnitude. These trends are observed for both thin-film model systems and 3D porous Ni/GDC composites. Using near ambient pressure X-ray photoelectron spectroscopy (NAP-XPS) on thin-film samples, we demonstrate that our results still hold true when the electrodes are exposed to gas atmospheres such as H₂/H₂O and CO/CO₂. In addition to Ni redistribution, pronounced ceria mobility is observed, including migration of a Ce-oxide species onto Ni under strongly reducing conditions, and Ce enrichment near Ni/NiO triple-phase boundaries under oxidising conditions, thus highlighting the active role of the oxide support in redox-driven morphology evolution.</p>","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":" ","pages":""},"PeriodicalIF":9.2,"publicationDate":"2026-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13644783/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149134451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multi-oxirane additives as property modifiers for DGEBA-based structural electrolytes.","authors":"Rajat Sharma, Sang Nguyen, Odysseas Kakarelidis, Emile S Greenhalgh, Milo S P Shaffer, Valeria Arrighi, Leide Cavalcanti, Natasha Shirshova","doi":"10.1039/d6ta02802k","DOIUrl":"https://doi.org/10.1039/d6ta02802k","url":null,"abstract":"<p><p>Structural supercapacitors require electrolytes that can efficiently transport ions while bearing mechanical loads, known as structural electrolytes (SEs). Here, we report the addition of the multi-oxirane epoxies, reactive epoxy additives (REAs), as a strategy to tune the microstructure of an established bicontinuous SE, formed by reaction induced phase separation (RIPS). Specifically, trimethylolpropane triglycidyl ether (TGETMP), 4-(diglycidylamino)phenyl glycidyl ether (GEDGP), tris(4-hydroxyphenyl)methane triglycidyl ether (TGETHP), and tetraglycidyl-4,4'-methylenedianiline (TGEMDA) were introduced into an SE based on a blend of bisphenol A diglycidyl ether (DGEBA) and 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide (EMIM-TFSI), (DGEBA_IL40). Additive concentrations were varied between 1 and 50 wt% and the SEs were characterized using scanning electron microscopy, impedance spectroscopy, three-point bending tests and dynamic mechanical thermal analysis. At 2.5 wt% addition, all REAs enhanced ionic conductivity, but reduced Young's modulus, relative to the unmodified SE based on DGEBA_IL40. TGETMP showed the most promising performance by increasing ionic conductivity by 90% and reducing Young's modulus only by 20%. Small-angle neutron scattering of the curing process of DGEBA_IL40 with the addition of 2.5 wt% TGETMP showed a delay in phase separation kinetics and an increase in the cluster correlation length from about 30 Å to 63 Å compared to the unmodified system. Carbon aerogel-modified carbon fibre (CF-CAG) structural electrodes were introduced into the SEs, to explore whether the bicontinuous microstructure would be retained in a multifunctional device. The unmodified SE (DGEBA_IL40) showed epoxy sheathing on CF-CAG with bead-like morphology around fibres and strut-like morphology in the bulk, showing that the presence of CF-CAG influenced local curing of the SE at the electrode/electrolyte interface. Encouragingly, the addition of 2.5 wt% TGETMP to DGEBA_IL40 reduced both epoxy sheathing and bead formation around CF-CAG.</p>","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":" ","pages":""},"PeriodicalIF":9.2,"publicationDate":"2026-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13632593/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149101220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Layered trigonal Co3O4 with full octahedral coordination: A milestone non-noble electrocatalyst for acidic PEM water electrolysis","authors":"Ruchun Li,Fengyi Liu,Licheng Wei","doi":"10.1039/d6ta06882k","DOIUrl":"https://doi.org/10.1039/d6ta06882k","url":null,"abstract":"A novel layered trigonal-phase Co3O4 (Tri-Co3O4) catalyst featuring fully octahedral Co coordination was reported by Shao and Huang’s group, which was fabricated via an original mechanochemical synthetic strategy. This Tri‑Co3O4 possessed a compact trilayer structure of edge‑sharing Co octahedra, where Co3+ and Co2+ occupy the outer and middle layers at a 1:2 molar ratio, matching the stoichiometry Co2+(Co3+)2O4. As a milestone breakthrough, the obtained Tri-Co3O4 showed exceptional oxygen evolution reaction (OER) electrocatalytic performance, delivering a low overpotential of 269 mV at 10 mA cm-2 and an ultralow cobalt dissolution rate in acidic solution. The proton exchange membrane water electrolysis (PEMWE) device assembled with the Tri-Co3O4 catalyst only required a low cell voltage of 1.80 V to achieve an industrial current density of 1800 mA cm-2.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"33 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2026-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149067309","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synergistic effects of UV irradiation and hydrothermal aging on Cu-USY for enhanced NH3-SCR of NOx: A dynamic CuOx reservoir strategy","authors":"Zhangpei Liu,Yao Wang,Longjing Tai,Junhua Li,Pengfei An,Zhiming Liu","doi":"10.1039/d6ta07196a","DOIUrl":"https://doi.org/10.1039/d6ta07196a","url":null,"abstract":"Selective catalytic reduction of NOx by NH3 (NH3-SCR) remains the predominant technology for mitigating NOx emissions from diesel vehicles, a major contributor to urban air pollution and associated public health risks. However, achieving both high low-temperature activity and hydrothermal stability remains challenging, especially in light of increasingly stringent emission regulations. In this study, we address this challenge by synthesizing Cu-USY catalysts via a UV-assisted ion-exchange method (Cu-USY (UV)). The UV irradiation promotes the formation of highly active Cu(OH)⁺ species, enabling the fresh catalyst to achieve over 90% NOx conversion across a broad temperature window of 250-550 °C. Remarkably, subsequent hydrothermal aging at 750 °C further extends this effective operating window to 175-550 °C, an effect attributed to the generation of highly dispersed CuOx crystallites. These crystallites act as a dynamic “Cu reservoir”, continuously replenishing isolated active sites and promoting the “Fast SCR” pathway via enhanced NO oxidation. This dual-enhancement mechanism establishes a new paradigm for designing ultra-stable SCR catalysts. By bridging catalyst design with operational performance, this work offers a viable route toward more sustainable and cost-effective NOx abatement technologies for diesel emission control.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"46 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2026-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149067402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}