Catalysis Today最新文献

{"title":"Stimuli-responsive Pickering emulsions: From interfacial design to catalytic opportunities","authors":"Pavel Svec,&nbsp;Niccolo Lusiani,&nbsp;Ondrej Sedlacek","doi":"10.1016/j.cattod.2025.115534","DOIUrl":"10.1016/j.cattod.2025.115534","url":null,"abstract":"<div><div>Stimuli-responsive Pickering emulsions stabilized by solid nanoparticles with properties modulated by external triggers represent a versatile platform for sustainable biphasic catalysis. Unlike conventional surfactant-based systems, these emulsions offer robust, surfactant-free interfaces with enhanced control over emulsification, demulsification, and even phase inversion, enabled by stimuli such as pH, temperature, light, redox conditions, or magnetic fields. This perspective article provides a concise overview of recent advances in the design of such \"smart emulsions \"with a focus on functional polymeric and hybrid nanoparticle stabilizers engineered for responsiveness. These systems not only facilitate on-demand catalyst recovery and product separation but also enhance catalytic efficiency through increased interfacial area and selective localization of the catalyst. While addressing current challenges in their scalability and long-term reusability, we highlight their applications in interfacial catalysis, biocatalysis, and environmental remediation. By integrating major advances in colloid science with responsive materials, these systems emerge as a promising avenue toward sustainable chemical processing.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"462 ","pages":"Article 115534"},"PeriodicalIF":5.3,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145046911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Activating properties of residual coke after incomplete oxidative regeneration of ferrierite used in skeletal 1-butene isomerization","authors":"Karoline L. Hebisch ,&nbsp;Pawel A. Chmielniak ,&nbsp;Violet A. Cutler ,&nbsp;Carsten Sievers","doi":"10.1016/j.cattod.2025.115545","DOIUrl":"10.1016/j.cattod.2025.115545","url":null,"abstract":"<div><div>This study demonstrates that partial oxidative regeneration of spent ferrierite zeolite (H-FER / H-ZSM-35) used in skeletal 1-butene isomerization effectively restores catalyst activity, while residual carbonaceous deposits significantly reduce the catalyst startup time. By employing catalyst characterization techniques such as X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS), <em>operando</em> UV-Vis spectroscopy, and density functional theory (DFT) calculations, the findings reveal that oxidative regeneration of spent H-FER at 500 °C removes external polycyclic aromatic carbonaceous deposits that block pore mouths. However, this process also promotes the migration of internal carbonaceous deposits to the external surfaces, where they condense into polycyclic aromatic structures. These structures obstruct pore access until the total carbonaceous deposits are reduced to below ∼1 wt%. Beyond this threshold, further oxidative removal of coke is not beneficial, as the residual carbonaceous deposits promote catalyst startup in subsequent cycles and inhibit strong acid sites that contribute to side product formation. In addition to offering a practical strategy for accelerating catalyst startup, this partial regeneration approach provides valuable insights into the nature of catalytically active species at the pore mouth. The results suggest that residual carbonaceous fragments can enhance catalyst activation speed by up to threefold. Utilizing these residual deposits as both coke precursors and selective poisons represents a promising method for efficient partial oxidative regeneration of catalysts affected by coke deposition.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"462 ","pages":"Article 115545"},"PeriodicalIF":5.3,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145046886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of introduced mesopore in TON zeolite on isomerization of oleic acid","authors":"Xinyu Wei,&nbsp;Toshiya Tsunakawa,&nbsp;Shaohua She,&nbsp;Mingming Peng,&nbsp;Kenji Kamiya,&nbsp;Eika W. Qian","doi":"10.1016/j.cattod.2025.115570","DOIUrl":"10.1016/j.cattod.2025.115570","url":null,"abstract":"<div><div>TON-type zeolite ZSM-22 with meso-microporous was developed by enhancing reactant diffusion and suppressing deactivation through mesoporous structuring, with the aim of investigating the isomerization of oleic acid. A series of meso-microporous ZSM-22 zeolite were synthesized via a desilication–recrystallization method. By adjusting the NaOH solution concentration (x = 0.4–1.0 M), the mesopore size was controlled, and CTAB facilitated the recrystallization of the dissolved silica, which then deposited on the catalyst surface, deactivating the surface acid sites. All samples were thoroughly characterized and evaluated in a continuous flow reactor for their isomerization performance. The catalyst prepared with 0.6 M NaOH (0.6M-Z22) exhibited the highest yield of branched unsaturated fatty acids, reaching 67.1 %, with a significantly suppressed dimer acid yield of only 14.9 % at 260 °C under WHSV = 6h⁻¹ . These results demonstrate that meso-microporous catalysts synthesized under optimal desilication conditions can enhance reactant diffusion within the zeolite channels and improve the yield of desired isomerized products. Also, undergoing moderate desilication, the catalyst's L/B acid sites ratio decreased, resulting in enhanced isomerization capability. Moreover, CTAB facilitated the recrystallization of the dissolved silica, which then deposited on the catalyst surface, deactivating the surface acid sites and suppressing the formation of side reactions. Finally, DTG analysis was performed to evaluate the coke formation on the spent catalysts. A 96-hour long-term durability test was also conducted. After 96 h of continuous operation, the conversion of oleic acid remained above 80 %, and the yield of branched unsaturated fatty acids was maintained at over 50 %.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"462 ","pages":"Article 115570"},"PeriodicalIF":5.3,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145154913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Guest editorial: Special issue of 13th International Symposium on Heterogeneous Catalysis, 2024, Burgas, Bulgaria","authors":"Tatyana Tabakova ,&nbsp;Silviya Todorova ,&nbsp;Jean-Luc Blin ,&nbsp;Kristina Chakarova","doi":"10.1016/j.cattod.2025.115540","DOIUrl":"10.1016/j.cattod.2025.115540","url":null,"abstract":"","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"462 ","pages":"Article 115540"},"PeriodicalIF":5.3,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145263013","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploration of active copper species in copper containing MWW-type zeolitic catalysts for CO oxidation","authors":"Yunhye Cho ,&nbsp;Hyeonwoo Shin ,&nbsp;Sang Woo Byun ,&nbsp;Trinh Thuan Khiet Nguyen ,&nbsp;Sungjoon Kweon ,&nbsp;Sung Bong Kang ,&nbsp;Min Bum Park","doi":"10.1016/j.cattod.2025.115564","DOIUrl":"10.1016/j.cattod.2025.115564","url":null,"abstract":"<div><div>A series of copper-containing MWW-type zeolitic catalysts (Cu-DML-x) were synthesized at various hydrothermal temperatures (x = 80–200 °C), and the catalytic activity in CO oxidation was investigated depending on the copper species. The chemical states of copper on Cu-DML-x catalysts were identified as a framework and extraframework Cu in MWW structure and copper oxides on the external surface depending on the temperature, and these Cu species coexisted with one another. While the MWW structural property was lost with increasing the synthesis temperature, the copper oxide species were additionally formed at higher temperatures. Cu-DML-100 and -120, mainly containing extraframework Cu, demonstrated superior CO oxidation activity compared to Cu-DML-80 with dominant framework Cu. Cu-DML-160, -180, and -200 catalysts, in which extraframework Cu and copper oxides were dominantly present as dual sites, showed the lowest activation energies. This indicates the critical role of extraframework Cu and copper oxides in promoting CO oxidation over zeolites.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"462 ","pages":"Article 115564"},"PeriodicalIF":5.3,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of reactor design and synthesis parameters on the morphology and catalytic performance of MgCl2-supported Ziegler–Natta catalysts for ethylene polymerization","authors":"Clinton Manianglung ,&nbsp;Daniel Owusu Asante ,&nbsp;Young Soo Ko","doi":"10.1016/j.cattod.2025.115543","DOIUrl":"10.1016/j.cattod.2025.115543","url":null,"abstract":"<div><div>This study investigates the influence of synthesis parameters on the morphology and catalytic activity of MgCl₂-supported Ziegler–Natta (ZN) catalysts for ethylene polymerization. ZN catalysts were prepared under varied conditions, including reactor design modifications, solvent types and volumes, and TiCl₄ feeding protocols. The notable differences in morphology, particle size, and Ti site density of the catalysts directly influenced their activity in slurry-phase polymerization experiments. Reactor design, particularly the inclusion of internal baffles, had the greatest impact, yielding more uniform morphology and higher activity. Dimensionless analysis confirmed that the triple-baffled flat-bottom reactor achieved turbulent flow (<em>Re</em> ≈ 2.2 × 10⁴) with minimal vortex formation (<em>Fr</em> ≈ 0.14) and a higher power number (<em>N_p</em>) than other designs, indicating superior mixing. These parameters offer a basis for estimating energy requirements and scaling up. Solvent volume also emerged as a critical factor in mitigating agglomeration and improving active site distribution. Overall, reactor design, supported by computational fluid dynamics (CFD) and quantitative mixing analysis, together with optimized synthesis conditions, offers a practical route to enhance ZN catalyst performance for industrial applications.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"462 ","pages":"Article 115543"},"PeriodicalIF":5.3,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145009890","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"CO2 methanation over BEA zeolite catalysts: Effect of MgO and in-situ Ni incorporation","authors":"Galal A. Nasser ,&nbsp;Akolade I. Bakare ,&nbsp;Mohmmed A. Sanhoob ,&nbsp;Jan Kopyscinski","doi":"10.1016/j.cattod.2025.115572","DOIUrl":"10.1016/j.cattod.2025.115572","url":null,"abstract":"<div><div>Carbon dioxide methanation is a promising carbon management technology that reduces CO₂ concentrations and facilitates the long-term storage of excess renewable energy, thereby closing the carbon cycle. This study investigates the catalytic performance of BEA zeolite-based catalysts in the methanation of CO₂, focusing on the role of MgO as a promoter and investigating the incorporation of Ni by in-situ method. The catalysts were synthesized via two methods: post-modification with Ni and MgO loading, and in-situ incorporation of Ni within the zeolite framework. Characterization techniques, including X-ray diffraction (XRD), Scanning Electron Microscope (SEM), Transmission Electron Microscopy (TEM), H₂-TPR, and CO₂-TPD, were used to evaluate the physical and chemical properties of the catalysts. The results demonstrated that MgO promoted the catalytic activity of BEA zeolites, enhancing CO₂ conversion and methane selectivity at lower reaction temperatures. The in-situ incorporation of Ni showed negligible activity at temperatures below 350 °C but outperformed post-modified catalysts at higher temperatures, particularly above 400 °C. These findings suggest that while post-modified catalysts are more effective at lower temperatures, in-situ Ni incorporation offers superior catalytic performance at elevated temperatures, making it a promising approach for high-temperature methanation reactions. This work contributes to the development of efficient catalysts for CO₂ methanation, supporting carbon capture and utilization efforts.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"462 ","pages":"Article 115572"},"PeriodicalIF":5.3,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145119218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Strain-driven adsorption site modification on Pd-based nano cube for fuel cell application","authors":"Yeonwoo Do ,&nbsp;Seohee Jang ,&nbsp;Seokho Lee ,&nbsp;Yiyun Yang ,&nbsp;Yunjeong Jang ,&nbsp;Hyun-Suk Kim ,&nbsp;Kwun-Bum Chung ,&nbsp;Kyung-Wan Nam ,&nbsp;Yoon Kee Kim ,&nbsp;Kihyun Shin","doi":"10.1016/j.cattod.2025.115547","DOIUrl":"10.1016/j.cattod.2025.115547","url":null,"abstract":"<div><div>This research focused on maximizing the catalytic activity in nanocubes (NCs) with (100) facets. The primary goal was to reduce the adsorption energy of the adsorbate, thereby enhancing the activity of the fuel cell catalyst and approaching the optimal point on the volcano plot. We induced strain by introducing core elements such as Ru, Rh, Ir, Au, Ag, Ni, Pt, Cu, and their intermetallic compounds. The adsorption energy for intermediates (such as O, OH, and OOH) was calculated by exploring various adsorption sites. Studies of strain and charge analysis have been conducted, providing deeper insight into interactions at the atomic level. Strain analysis revealed how the different core elements affect the lattice parameters and consequently the adsorption energy of the intermediates. Charge analysis highlighted the redistribution of electron density upon adsorption, providing a clearer picture of the relationship between strain, electronic structure, and catalytic activity. The study illuminated the prospect of advancing fuel cell technology through a comprehensive understanding of the interplay between the surface reconstruction and strain on the (100) surface. Such understanding enabled effective manipulation of catalytic adsorption energy, offering promising strategies for further enhancing fuel cell catalyst activity.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"462 ","pages":"Article 115547"},"PeriodicalIF":5.3,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145004974","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tailoring Ni particle size to improve catalytic methane decomposition on La2Ce2O7 supports","authors":"Sung-Bin Choi ,&nbsp;Da-Bin Kang ,&nbsp;Su-Ji Kim ,&nbsp;Gwan-Joong Park ,&nbsp;Youngji Kim ,&nbsp;Woohyun Kim ,&nbsp;Chang Hyun Ko","doi":"10.1016/j.cattod.2025.115550","DOIUrl":"10.1016/j.cattod.2025.115550","url":null,"abstract":"<div><div>Catalytic decomposition of methane (CDM) provides a CO₂-free route for hydrogen production, where the structure and dispersion of Ni particles play a critical role in determining catalytic performance. In this study, Ni-based catalysts supported on Ce-rich La–Ce mixed oxides were synthesized using two different precipitation methods: co-precipitation (CP) and deposition- precipitation (DP). The CP method resulted in the incorporation of Ni species within the support lattice, which led to stronger metal–support interaction but limited surface accessibility. In contrast, the DP method produced Ni particles mainly on the support surface, enhancing methane activation at low Ni loadings. However, when the Ni loading exceeded 20 wt%, the DP catalysts showed significant particle aggregation and partial detachment from the support. Despite retaining moderately ordered carbon structures, this structural degradation reduced CDM activity due to diminished dispersion and weaker particle anchoring. Among all catalysts tested, the DP–NLC–10 sample with approximately 30 nm Ni particles exhibited the highest carbon yield, attributed to its optimal particle size and surface dispersion. These results demonstrate that not only the amount, but also the spatial arrangement and stability of Ni particles must be carefully controlled to achieve high and stable performance in methane decomposition.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"462 ","pages":"Article 115550"},"PeriodicalIF":5.3,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145046910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cyclometalated dinuclear iridium(III) complex with 2,2'-bipyridyl-based bridging ligand as a photosensitizer for photochemical hydrogen evolution reaction","authors":"Junya Omaki,&nbsp;Natsumi Yano,&nbsp;Yusuke Kataoka","doi":"10.1016/j.cattod.2025.115579","DOIUrl":"10.1016/j.cattod.2025.115579","url":null,"abstract":"<div><div>A new cyclometalated dinuclear iridium complex with a 1,2-bis(4′-methyl-2,2'-bipyridin-4-yl)ethane (bmbe) bridging ligand, [Ir₂(ppy)₄(bmbe)](PF₆)₂ (<strong>IrPS-D</strong>; ppy = 2-phenylpyridinate), which is anticipated to function as a highly efficient photosensitizer (PS) for the photochemical hydrogen evolution reaction, is synthesized and structurally characterized via ¹H NMR, ESI-TOF-MS, ATR-FT-IR, elemental analysis, and single crystal X-ray diffraction analyses. The combination of spectroscopic analysis and time-dependent density functional theory calculations clarifies that (i) the visible-light absorption spectrum of <strong>IrPS-D</strong> exhibits a shape and excitation features almost identical to those of [Ir(ppy)₂(dmbpy)]PF₆ (<strong>IrPS-M</strong>; dmbpy = 4,4<em>'</em>-dimethyl-2<em>,2′</em>-bipyridine), which is a well-known promising PS for the photochemical hydrogen evolution reaction and mononuclear counterpart of <strong>IrPS-D</strong>, whereas the spectral intensity of <strong>IrPS-D</strong> is approximately twice as high as that of <strong>IrPS-M</strong>; (ii) the emission energies of <strong>IrPS-D</strong> and <strong>IrPS-M</strong> are nearly identical; however, <strong>IrPS-D</strong> exhibits a slightly shorter emission lifetime and higher quantum yield compared with those of <strong>IrPS-M</strong>, resulting in relatively faster radiative and non-radiative rate constants for <strong>IrPS-D</strong> compared with those of <strong>IrPS-M</strong>; and (iii) the excited state of <strong>IrPS-D</strong> is quenched by triethylamine (TEA) faster than that of <strong>IrPS-M</strong>. Upon visible-light irradiation, <strong>IrPS-D</strong> serves as a highly efficient PS for the photochemical hydrogen evolution reaction in the presence of K₂PtCl₄ and TEA, which function as the hydrogen evolution catalyst and sacrificial electron donor, respectively. The maximum turnover number (TON_PS) of <strong>IrPS-D</strong> for hydrogen evolution is 2672, which is approximately 4.75 times greater than that of <strong>IrPS-M</strong> (TON_PS = 563) under the same reaction conditions.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"462 ","pages":"Article 115579"},"PeriodicalIF":5.3,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227248","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}