Catalysis Today最新文献

{"title":"Photocatalytic and antimicrobial activity of TiO2 particles, obtained by Mentha spicata leaves–mediated synthesis","authors":"Ognian Dimitrov ,&nbsp;Katerina Zaharieva ,&nbsp;Irina Stambolova ,&nbsp;Rumyana Eneva ,&nbsp;Stephan Engibarov ,&nbsp;Irina Lazarkevich ,&nbsp;Yana Gocheva ,&nbsp;Daniela Stoyanova ,&nbsp;Maria Shipochka ,&nbsp;Pavel Markov ,&nbsp;Ralitsa Mladenova ,&nbsp;Mariela Dimitrova ,&nbsp;Antonia Bakalova","doi":"10.1016/j.cattod.2025.115466","DOIUrl":"10.1016/j.cattod.2025.115466","url":null,"abstract":"<div><div>The TiO₂ anatase nanoparticles were obtained by plant-assisted synthesis using <em>Mentha spicata</em> (MS) leaves water extract and titanium isopropoxide solution. The hydrothermal activation of plant extract-modified titanium solution was carried out at two different temperatures and treated thermally at 400 °C. The prepared powders were characterized by the following techniques: powder X-ray diffraction analysis (PXRD), Fourier transform infrared (FT-IR) spectroscopy, Scanning Electron microscopy (SEM), Energy dispersive X-ray analysis (EDS), Transmission Electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Diffuse reflectance spectroscopy (DRS), Electron paramagnetic resonance (EPR) and BET analyses. It was established that the plant-assisted samples possess higher specific area and better dispersion than those of the reference powders. The samples obtained at higher hydrothermal temperature (HT) possess the smallest particles sizes in the range 8–12 nm, according to TEM analyses. When both the HT and activation time increase, the amount of hydroxyl groups increases, while the amount of lattice oxygen decreases. The addition of plant extract during the synthesis process leads to changes of the textural and structural features of the obtained samples, which result in increasing of the band gap values for the M0 (3.22 eV) and M0-H powders (3.25 eV). All above mentioned physicochemical features cause better adsorption of the dye and inner surface illumination, thus resulting in improved photocatalytic activity of the plant-assisted synthesized particles towards Reactive Black 5 dye UV-initiated discoloration (96 %). The obtained photocatalysts exhibit high stability during three consecutive cycles. The synergistic effect of UV-light and particles on <em>E. coli, P. aeruginosa, B. subtilis</em> and <em>O. paurometabola</em> bacterial strains was demonstrated. The plant-assisted synthesized powders showed a stronger inhibitory effect compared to that of the reference TiO₂.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"460 ","pages":"Article 115466"},"PeriodicalIF":5.2,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144679462","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":"Nanostructured Rh/SiC@SiO2 core@shell catalysts for microwave-assisted dry reforming of methane","authors":"José Palomo,&nbsp;Max Caspers,&nbsp;Atsushi Urakawa","doi":"10.1016/j.cattod.2025.115464","DOIUrl":"10.1016/j.cattod.2025.115464","url":null,"abstract":"<div><div>Dry reforming of methane (DRM) was investigated using nanostructured core@shell materials, thermally activated with two different heating methods, namely conventional resistive heating and microwave. The core@shell catalysts were composed of β-SiC nanoparticles, with a mean particle size below 100 nm, coated by a uniform SiO₂ shell of ca. 30 nm thickness. Highly dispersed Rh nanoparticles, with a mean particle size of 2.5 nm, were present on the surface of the SiO₂ shell. Operation under microwave heating conditions enhanced the reverse water gas shift reaction activity, which takes place in parallel with the DRM process, as compared to the operation under resistive heating conditions. Moreover, stable long-term operation was achieved under microwaved-assisted conditions, due to the unique spatial arrangement of the phases composing the nanostructured catalytic system, together with the suppression of irreversible coke deposition.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"460 ","pages":"Article 115464"},"PeriodicalIF":5.2,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144679463","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":"Doped CeO2-LaFeO3 composite cathode for high-temperature CO2 electrolysis: Improved performance and H2S tolerance","authors":"Longtai Li ,&nbsp;Motonori Watanabe ,&nbsp;Miki Inada ,&nbsp;Tatsumi Ishihara","doi":"10.1016/j.cattod.2025.115470","DOIUrl":"10.1016/j.cattod.2025.115470","url":null,"abstract":"<div><div>High-temperature solid oxide electrolysis cells (SOECs) are a promising solution for CO₂ reutilization, however traditional Ni-based cathodes face challenges for high activity and stability by carbon deposition as well as sulfur poisoning. This study examines the CO₂ electrolysis performance and H₂S tolerance of a perovskite and fluorite composite cathode, Ce_0.6Mn_0.3Fe_0.1O₂-La_0.6Sr_0.4Fe_0.8Mn_0.2O₃ (CMF-LSFM), using a 0.3 mm thickness LSGM electrolyte. The composite showed synergy effect and achieved a current density a nearly double larger than that of pure LSFM or CMF cathode at 1073 K and 1.6 V, with Faraday efficiency of ca. 100 % and negligible carbon deposition. At 1173 K, the composite achieved a current density as high as 1.2 A/cm² at 1.6 V. H₂S tolerance tests showed the electrode endured 3 ppm H₂S with recoverable deactivation, however further higher concentrations (10–30 ppm) caused cathodic activity to decrease slightly, which was much stable than that of Ni. The degradation is mainly attributed to Sr segregation and the formation of surface sulfate species (SO₄^2-), which block active sites. These results showed CMF-LSFM as a high-performance cathode for CO₂ electrolysis with reasonable stability to H₂S.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"460 ","pages":"Article 115470"},"PeriodicalIF":5.2,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144665932","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":"Multivariate analysis in selective reduction of m-iodonitrobenzene by aqueous ammonium sulfide under liquid-liquid phase transfer catalysis","authors":"Snigdha Senapati,&nbsp;Narayan C. Pradhan","doi":"10.1016/j.cattod.2025.115463","DOIUrl":"10.1016/j.cattod.2025.115463","url":null,"abstract":"<div><div>Reduction of <em>m</em>-iodonitrobenzene (<em>m</em>-INB) was conducted under a liquid-liquid phase transfer catalysis system using aqueous ammonium sulfide. This process yielded <em>m</em>-iodoaniline (<em>m</em>-IA) as the sole product. An experimental design based on response surface methodology was utilized to optimize the conversion of <em>m</em>-INB. Box-Behnken design was employed to assess both individual and interactive effects of experimental variables (temperature, catalyst concentration, <em>m</em>-INB concentration, and NH₃/sulfide mole ratio) on the reduction of <em>m</em>-INB. A reliable quadratic regression model was developed, demonstrating strong predictive capability using the experimental design data. Optimization via a desirability function predicted a maximum <em>m</em>-INB conversion of 100 % under the following operating conditions: temperature 321.5 K, catalyst concentration 0.074 kmol/m³ , <em>m</em>-INB/sulfide ratio 0.233, and NH₃/sulfide mole ratio 3.78. The analysis of variance, which yielded an R² value of 99.4 % for <em>m</em>-INB conversion, confirmed strong agreement between experimental outcomes and predicted values obtained from the fitted model. Thus, this study effectively demonstrates the advantages of experimental design to model reaction parameters for <em>m</em>-IA production.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"460 ","pages":"Article 115463"},"PeriodicalIF":5.2,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144662686","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":"Effects in the performance of bimetallic catalysts for the hydrogenation of amides to amines: From experimental to data-driven insights","authors":"Jorge A. Delgado ,&nbsp;Akira Yada ,&nbsp;Raphael Wischert ,&nbsp;Stephane Streiff","doi":"10.1016/j.cattod.2025.115467","DOIUrl":"10.1016/j.cattod.2025.115467","url":null,"abstract":"<div><div>This work evaluates the impact of various parameters on bimetallic catalysts in the hydrogenation of amides to amines, using systematic experimental and data-driven methods. Bimetallic catalysts were synthesized via a sequential wet impregnation approach and tested on the hydrogenation of N,N-dimethyldodecanamide to N,N-dimethyldodecanamine. The choice of metal precursors, supports, and the oxophilic metal significantly influenced the catalytic performance. Data-driven analysis indicates that oxophilic metals with large electronegativity and weak O adsorption display higher conversion, whereas those with large enthalpy of fusion exhibit higher amine selectivity.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"460 ","pages":"Article 115467"},"PeriodicalIF":5.2,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144679461","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 on tuning the CO2 hydrogenation to C5+ via co-impregnation: The Role of Cu and K distribution on Fe@TiO₂ catalysts","authors":"Anna D.F.F. Monsores ,&nbsp;Camila P. Ferraz ,&nbsp;João M.A.R. de Almeida ,&nbsp;Eduardo F. Sousa-Aguiar ,&nbsp;Pedro N. Romano","doi":"10.1016/j.cattod.2025.115465","DOIUrl":"10.1016/j.cattod.2025.115465","url":null,"abstract":"<div><div>Promoters play a crucial role in optimizing CO₂ hydrogenation by enhancing adsorption and lowering activation energy in heterogeneous catalysts. This study investigates the synergistic effects of potassium and copper on Fe@TiO₂ catalysts, focusing on their structural modification and influence over catalytic performance, mainly C₅₊ production. Characterization results demonstrated that K incorporation significantly increased weak basic sites, highlighting its dominant role as surface modification, enabling rapid CO₂ activation and desorption, preventing surface over-saturation, and facilitating CHx buildup and C–C coupling over Fe and Fe–Cu interfaces. Cu facilitated iron reducibility and CO formation via the RWGS reaction. The co-impregnation method led to a more homogeneous metal distribution, promoting uniform nucleation and minimizing phase segregation during drying and calcination, which improves catalyst stability and accessibility to active sites. Catalytic tests revealed that K10Fe@TiO₂, prepared by co-impregnation, exhibited the best performance with 20 % CO₂ conversion and 47 % selectivity toward C₂⁺ hydrocarbons while minimizing CH₄ formation (≤ 15 %). This preparation method enhanced the promoting effect of Cu in RWGS while optimizing K's role in chain growth via Fischer-Tropsch synthesis. These findings highlight the potential of co-impregnation to fine-tune Fe-based catalysts for selective CO₂ conversion, offering a promising pathway toward sustainable fuel production.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"460 ","pages":"Article 115465"},"PeriodicalIF":5.2,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144662687","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":"Synergistic ZrO2 effects in Co/In2O3 catalysts: Enhancing activity and selectivity for CO2 hydrogenation to methanol","authors":"Biao Gao ,&nbsp;Wenbo Gao ,&nbsp;Longtai Li ,&nbsp;Tatsumi Ishihara ,&nbsp;Limin Guo","doi":"10.1016/j.cattod.2025.115449","DOIUrl":"10.1016/j.cattod.2025.115449","url":null,"abstract":"<div><div>The In₂O₃-ZrO₂ solid solution catalyst has emerged as a versatile catalytic support for CO₂ hydrogenation to methanol, enabling noble metal-based systems (e.g., Pt, Ir) to achieve improved methanol selectivity. Building on this foundation, we introduce cobalt into the In₂O₃-ZrO₂ matrix, creating a novel Co/In₂O₃-ZrO₂ composite catalyst that synergistically integrates transition metal functionality with oxide engineering. The optimized catalyst achieves a methanol space-time yield of 0.80 g_MeOH·gcat⁻¹·h⁻¹ at a 5.0 MPa, H₂/CO₂ = 3:1, 320 °C, <em>GHSV</em> = 48,000 cm³<strong>·</strong><span><math><mrow><msubsup><mi>g</mi><mi>cat</mi><mrow><mo>−</mo><mn>1</mn></mrow></msubsup><mi>·</mi></mrow></math></span>h⁻¹, surpassing reported In₂O₃-ZrO₂ and Co/In₂O₃ benchmarks. Mechanistic studies reveal that methanol synthesis follows the formate pathway, where ZrO₂ amplifies oxygen vacancy density to improve CO₂ adsorption and weakens CO adsorption through electronic modulation.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"460 ","pages":"Article 115449"},"PeriodicalIF":5.2,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144605271","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":"Direct alkylation of benzene with propane promoted by a hydrotalcite-supported Pt–Fe and solid acid catalyst system","authors":"Kenta Suzuki,&nbsp;Shingo Hasegawa,&nbsp;Ken Motokura","doi":"10.1016/j.cattod.2025.115448","DOIUrl":"10.1016/j.cattod.2025.115448","url":null,"abstract":"<div><div>The development of suitable catalytic systems for the low-temperature dehydrogenation of propane to propylene could contribute to the highly selective production of cumene from propane and benzene. In this study, direct cumene synthesis from benzene and propane was conducted at 250 ℃ using supported Pt and solid acid catalysts. The supported Pt catalysts, including hydrotalcite-supported Pt–Fe bimetallic catalysts, were prepared using the ethylene glycol or sodium borohydride reduction method and characterized using transmission electron microscopy, X-ray diffraction, and Pt L₃-edge and/or Fe K-edge X-ray absorption fine structure analyses. Partially reduced, small Pt nanoparticles with diameters of 1.3–1.5 nm were formed in the catalyst prepared using the ethylene glycol reduction method. Among the solid acids mixed with the Pt catalysts, silica-supported heteropoly acids achieved a high conversion of benzene while maintaining good selectivity to cumene. In particular, Pt–Fe catalysts with silica-supported heteropoly acids achieved the highest selectivity for cumene (91.9 %), with a benzene conversion of 2.0 %.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"460 ","pages":"Article 115448"},"PeriodicalIF":5.2,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144596454","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":"Nickel-supported catalysts on nano-graphene platelets and carbon nanotubes for the carbon dioxide hydrogenation reaction","authors":"Jéssica Rabelo do Nascimento ,&nbsp;Martin Schmal ,&nbsp;Carlos Alberto Chagas Jr. ,&nbsp;Raimundo Crisostomo Rabelo Neto ,&nbsp;Braulio S. Archanjo ,&nbsp;Amanda Garcez Veiga","doi":"10.1016/j.cattod.2025.115444","DOIUrl":"10.1016/j.cattod.2025.115444","url":null,"abstract":"<div><div>We synthesized nickel catalysts supported on carbon nanotubes (Ni/NTC), graphene nanoplatelets (Ni/NPG), and silica (Ni/SiO₂) and evaluated their performance in CO₂ methanation. Ni/NTC exhibited the highest CO₂ conversion (59 %) and CH₄ selectivity (95.7 %) at 450 °C, outperforming other supports due to favorable Ni crystallinity and dispersion.\". The catalytic performance for CH₄ production was Ni/NTC&gt;Ni/SiO₂&gt;Ni/NPG. The crystallinity, reducibility, and size of Ni nanoparticles were the factors that contributed to the difference in catalytic performance.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"460 ","pages":"Article 115444"},"PeriodicalIF":5.2,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144589182","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":"Steam reforming of bio-oil stabilized with ethanol over a Ni/MgAl2O4 catalyst in a Pd-membrane reactor","authors":"Sergio Iglesias-Vázquez ,&nbsp;José Valecillos ,&nbsp;Aingeru Remiro ,&nbsp;Gorka Elordi ,&nbsp;David Alique ,&nbsp;Alejandro J. Santos-Carballes ,&nbsp;Raúl Sanz ,&nbsp;José A. Calles ,&nbsp;Javier Bilbao ,&nbsp;Ana G. Gayubo","doi":"10.1016/j.cattod.2025.115445","DOIUrl":"10.1016/j.cattod.2025.115445","url":null,"abstract":"<div><div>A new membrane reactor (MR) has been used in the steam reforming (SR) of a feed of raw bio-oil stabilized with 25 wt% ethanol over a Ni/MgAl₂O₄ catalyst, comparing the results (yield of H₂ and byproduct gases) to those reached in a conventional reactor (CR). The reaction setup involves two steps in series: a down-flow tube (at 500 ºC) for the vaporization of the feed and controlled removal of pyrolytic lignin (PL) from the oxygenates in the bio-oil, followed by an up-flow reactor provided with a composite Pd membrane supported on a porous stainless steel (PSS) tube containing a CeO₂ intermediate layer (Pd/CeO₂/PSS). In the MR configuration (with permeate pressure of 0.2 bar absolute), a H₂ yield of 82 % was achieved at 550 ºC, space time of 2.8 h, S/C ratio of 1.55 and 3 bar in the retentate (reactor). This result significantly improves those reached in CR, even at 1 bar and 600 ºC. The S/C ratio in the feed must be limited in the MR configuration to avoid restrictions in H₂ flux through the Pd-membrane caused by a higher gas dilution and concentration-polarization effect, as observed when the S/C ratio is increased up to 2.2. Similarly, a higher retentate pressure has a negative effect on the H₂ yield due to its negative impact on the equilibrium of methane SR, that overcomes its benefits on the H₂ permeation through the membrane. A promising performance of the membrane and catalyst has been obtained, thus demonstrating good prospects for their use in the sustainable production of H₂ from lignocellulosic biomass.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"460 ","pages":"Article 115445"},"PeriodicalIF":5.2,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144605270","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}