Catalysis Today最新文献

{"title":"Comparative assessment of Mo/Ti and Mo/C catalysts for phenol hydrodeoxygenation: Influence of support and hydrogen treatment","authors":"Débora G.B. Dionizio ,&nbsp;Priscilla M. de Souza ,&nbsp;Cristiane A. Henriques ,&nbsp;Gilles Berhault","doi":"10.1016/j.cattod.2025.115291","DOIUrl":"10.1016/j.cattod.2025.115291","url":null,"abstract":"<div><div>Even if catalytic hydrodeoxygenation (HDO) is a promising approach for converting bio-oil into high-value products, this reaction process still faces challenges related to the inherent high hydrogen consumption needed to perform it. Therefore, the hydrodeoxygenation (HDO) of phenol was herein studied in the gas phase using molybdenum catalysts supported on titania (Mo/Ti) and activated carbon (Mo/C) at atmospheric pressure in order to evaluate the consequences of hydrogen treatment on the catalytic properties of these Mo-based HDO catalysts. Samples were characterized by ICP-OES, XRD, XPS, Raman, TPR, H₂O-TPD, and oxygen chemisorption, and the physicochemical properties were compared with their catalytic performances. Under the studied conditions, the support type and the hydrogen treatment cause changes in active species (MoO₂ and MoO₃), promoting different catalyst behaviors. However, all the catalysts studied were 100 % selective to benzene, indicating that the molybdenum active phase did not influence the selectivity of the reaction.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"454 ","pages":"Article 115291"},"PeriodicalIF":5.2,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143735333","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":"Chemo-enzymatic phenol polymerisation via in-situ H2O2 synthesis","authors":"Liwei Zhang ,&nbsp;Richard J. Lewis ,&nbsp;Joseph Brehm ,&nbsp;Wencong Liu ,&nbsp;David J. Morgan ,&nbsp;Thomas E. Davies ,&nbsp;Yong Wang ,&nbsp;Graham J. Hutchings","doi":"10.1016/j.cattod.2025.115292","DOIUrl":"10.1016/j.cattod.2025.115292","url":null,"abstract":"<div><div>Within this contribution, the combination of supported AuPd nanoalloys with horseradish peroxidase is demonstrated to offer high efficacy towards the one-pot oxidative polymerisation of the model wastewater contaminant phenol, via the chemo-catalytic supply of in-situ generated H₂O₂_. Notably, the utilisation of AuPd alloyed formulations offered considerably improved cascade efficiencies, compared to that observed over monometallic analogues, with the optimal 0.5%Au-0.5%Pd/TiO₂ catalyst achieving total conversion of phenol within 15 minutes when used in conjunction with the enzyme. Importantly, the in-situ chemo-enzymatic system was shown to offer good stability over successive reactions, and outperforms analogous approaches reliant on the use of preformed H₂O₂, while also avoiding the proprietary stabilising agents present in the commercial oxidant.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"454 ","pages":"Article 115292"},"PeriodicalIF":5.2,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143735335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Catalytic behavior of ITQ-13 zeolite in benzene and toluene ethylation","authors":"M. Teresa Portilla ,&nbsp;Avelino Corma ,&nbsp;Cristina Martínez ,&nbsp;Susana Valencia ,&nbsp;Francisco J. Llopis","doi":"10.1016/j.cattod.2025.115288","DOIUrl":"10.1016/j.cattod.2025.115288","url":null,"abstract":"<div><div>The ITQ-13 zeolite (ITH) presents a three-dimensional channel system formed by channels delimited by rings of 9 and 10 tetrahedra (9MR and 10MR). This material has been studied as a catalyst in reactions of interest in the petrochemical industry, which are carried out on a commercial scale in the presence of medium-pore zeolites, such as the alkylation of benzene or toluene with ethylene or ethanol. Due to its acidic properties and its particular topology, zeolite ITQ-13 presents a comparable activity to that of ZSM-5 or MCM-22, employed at commercial scale, but also higher selectivity to the main alkylation products and lower deactivation rate. The large cavities located at the intersections between the 9MR and 10MR channels, capable of hosting larger reaction intermediates than ZSM-5, and the greater activity of its external surface, could be responsible for the improved catalytic behavior of ITQ-13.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"454 ","pages":"Article 115288"},"PeriodicalIF":5.2,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725146","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":"Performance of Ni-M/Ca12Al14O33 (M= Co, Cu and Fe) bimetallic catalysts in sorption-enhanced steam methane reforming for blue hydrogen production","authors":"Ahmad Salam Farooqi ,&nbsp;Muhammad Zubair Shahid ,&nbsp;Mohamed Essalhi ,&nbsp;Mohammad M. Hossain ,&nbsp;Mahmoud M. Abdelnaby ,&nbsp;Mohammed A. Sanhoob ,&nbsp;Vasilije Manovic ,&nbsp;Medhat A. Nemitallah","doi":"10.1016/j.cattod.2025.115281","DOIUrl":"10.1016/j.cattod.2025.115281","url":null,"abstract":"<div><div>The sorption-enhanced steam methane reforming (SE-SMR) represents a significant advancement in clean hydrogen production. By integrating methane steam reforming with in-situ CO₂ capture, this process offers a sustainable method for hydrogen production while minimizing CO₂ emissions. This study investigates the catalytic performance of monometallic Ni/Ca₁₂Al₁₄O₃₃ and three bimetallic catalysts (Ni-M/Ca₁₂Al₁₄O₃₃, where M=Co, Cu, and Fe) for the SE-SMR reaction. The materials were synthesized using a wet impregnation method and characterized through XRD, XRF, BET, SEM, and TGA to assess their structural, textural, and CO₂ sorption properties. The SE-SMR reaction was conducted in a fixed bed reactor at 700 ℃ with a steam-to-carbon (S/C) ratio of 3, focusing on evaluating catalyst activity, stability, and he synergistic effects of catalytic reforming and CO₂ sorption capacity. The XRD analysis of fresh samples revealed the presence of free CaO, which aids in capturing CO₂ during the reaction. The Ni/Ca₁₂Al₁₄O₃₃ catalyst displayed promising initial activity, which gradually decreased due to sorbent saturation. Among the bimetallic catalysts, Ni-Co/Ca₁₂Al₁₄O₃₃ exhibited the highest average hydrogen purity (78 %) and superior stability due to the synergistic effect of Co and Ni. The Ni-Cu catalyst demonstrated moderate hydrogen purity (∼50 %), whereas the Ni-Fe catalyst showed relatively poor performance, likely due to unfavourable interactions between Ni and Fe, as indicated by XRD. Additionally, the TGA results revealed that Ni-Co/Ca₁₂Al₁₄O₃₃ also maintained excellent cyclic stability for CO₂ adsorption and regeneration over 10 cycles. The kinetic parameters of CO₂ adsorption were estimated using a double exponential method, which indicated the highest specific sorption rate constant for the Ni-Co/Ca₁₂Al₁₄O₃₃ sample.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"454 ","pages":"Article 115281"},"PeriodicalIF":5.2,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143705045","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":"Atomic layer deposited zinc promoted copper catalysts for carbon dioxide hydrogenation to methanol: Influence of support","authors":"Aitor Arandia ,&nbsp;Jorge A. Velasco ,&nbsp;Ahmed Sajid ,&nbsp;Jihong Yim ,&nbsp;Hammad Shamshad ,&nbsp;Hua Jiang ,&nbsp;Ashish Chahal ,&nbsp;Abhinash Kumar Singh ,&nbsp;Christine Gonsalves ,&nbsp;Reetta Karinen ,&nbsp;Riikka L. Puurunen","doi":"10.1016/j.cattod.2025.115283","DOIUrl":"10.1016/j.cattod.2025.115283","url":null,"abstract":"<div><div>Copper promoted with zinc is an active catalyst for carbon dioxide hydrogenation to methanol, a reaction relevant to carbon capture and utilization technologies. Previous work showed that inverse zinc-on-copper catalysts on zirconia supports, where zinc(II) is added via atomic layer deposition (ALD), are more active and selective in this reaction than copper-on-zinc catalysts on zirconia. This work continues exploring the inverse zinc-on-copper catalysts by varying the support, comparing zirconia support with alumina, titania and niobia, and with various combinations of the ceria-zirconia-lanthana mixed oxide family. Catalyst characterization was made with elemental analysis, temperature-programmed reduction, temperature-programmed desorption of carbon dioxide, nitrous oxide pulse titration, and transmission electron microscopy. Activity was measured in a fixed-bed flow reactor at 450–550 K. ALD of Zn(II) acetylacetonate gave a similar areal number density of ca. two zinc per square nanometer on all tested supports. Zinc promotion systematically increased the methanol production rate. Among the tested catalysts, the zinc-on-copper on zirconia support remained the most active, with other catalysts from the ceria-zirconia-lanthana mixed oxide family giving almost as good results.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"454 ","pages":"Article 115283"},"PeriodicalIF":5.2,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143697760","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"CO2 facilitated aromatization of butenes to benzene, toluene and xylene","authors":"Yu Shao ,&nbsp;Yi Ding ,&nbsp;Feng Jiao ,&nbsp;Dengyun Miao ,&nbsp;Shujing Guo ,&nbsp;Junfeng Wang ,&nbsp;Xiulian Pan","doi":"10.1016/j.cattod.2025.115285","DOIUrl":"10.1016/j.cattod.2025.115285","url":null,"abstract":"<div><div>The aromatization of mixed C₄ olefins is an important way to convert low value industrial C₄ hydrocarbons by-products into value-added chemicals. Herein, we report CO₂ facilitated aromatization of C₄ olefins to benzene, toluene and xylene (BTX) using metal oxide-zeolite (OXZEO) bifunctional catalysts. An aromatics selectivity of 80.0 % at a CO₂ conversion 10.5 % and butene conversion ∼100 % has been obtained at 500 °C and 1.0 MPa. The proportion of BTX in aromatics reaches as high as 91.0 %. Detailed characterization reveals that the Brønsted acid sites of ZSM-5 are the active sites for aromatization, while the presence of ZnCrAlO_x oxides provides adsorption sites for CO₂ and further reaction with the hydrogen species generated during aromatization. The presence of CO₂ not only enhances the selectivity of aromatics, but also improves the stability of the reaction. ¹³C isotope experiments demonstrate that CO₂ participates in the formation of aromatics. Furthermore, this new strategy is applicable for utilization of different sources of mixed C₄ olefins and C₄-C₅ olefins, in addition to the benefits of utilizing CO₂ towards a sustainable decarbonized society.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"454 ","pages":"Article 115285"},"PeriodicalIF":5.2,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739807","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":"Tuning the active sites of supported cobalt Fischer-Tropsch catalysts to enhance efficiency for hard wax production","authors":"Denzil Moodley ,&nbsp;Jana Potgieter ,&nbsp;Prabashini Moodley ,&nbsp;Renier Crous ,&nbsp;Pieter van Helden ,&nbsp;Lia van Zyl ,&nbsp;Randy Cunningham ,&nbsp;Jean Gauché ,&nbsp;Kobus Visagie ,&nbsp;Thys Botha ,&nbsp;Michael Claeys ,&nbsp;Eric van Steen","doi":"10.1016/j.cattod.2025.115282","DOIUrl":"10.1016/j.cattod.2025.115282","url":null,"abstract":"<div><div>The Fischer-Tropsch (FT) process yields high-quality hydrocarbon products, including hard waxes used in adhesives, polymer processing, cosmetics, and pharmaceutical applications. Sasol commercially produces these hard waxes using precipitated iron-based catalysts, which are cost-effective compared to cobalt catalysts. With proper chemical promotion, these iron catalysts can produce a high-alpha (C_25–40 = 0.95) product slate, suitable for hard wax production. However, iron catalysts are characterised by short reactor lifetimes, waste generation during production, sensitivity to high water partial pressures, and high CO₂ production. These issues can be mitigated by using cobalt slurry catalysts. However, cobalt’s limited responsiveness to chemical promotion poses a significant obstacle, making it challenging to achieve hard wax selectivity under the same conditions. This study aims to enhance hard wax selectivity by tuning the active sites of a supported cobalt catalyst for stable operation at high per pass conversion. During activation and FT synthesis, nanoparticulate cobalt mainly exists in two phases: hexagonal close-packed (HCP) and face-centred cubic (FCC). Theoretical simulations indicated that the HCP phase has superior activity due to a greater variety of site arrangements. A reduction-carbiding-reduction (RCR) technique was developed to prepare HCP-rich cobalt catalysts. The performance of HCP-rich and FCC-HCP mixed catalysts (the latter produced by standard H₂ activation) were assessed via <em>in-situ</em> magnetometry and lab-scale FT testing. The catalyst preparation and activation methods were scaled up to a pilot level and tested in a 2-inch slurry bubble column to evaluate catalyst hard wax yield, and to generate samples for application testing.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"454 ","pages":"Article 115282"},"PeriodicalIF":5.2,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143695940","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 of defective nanostructured alumina supports on the syngas production by tri-reforming of methane","authors":"Gabriela M. Bertoldo ,&nbsp;Alcineia C. Oliveira ,&nbsp;Gilberto D. Saraiva ,&nbsp;Gardenia S. Pinheiro ,&nbsp;Rossano Lang ,&nbsp;Elisabete M. Assaf ,&nbsp;Alessandra Lucredio ,&nbsp;Daniel Ballesteros-Plata ,&nbsp;Enrique Rodríguez-Castellón","doi":"10.1016/j.cattod.2025.115280","DOIUrl":"10.1016/j.cattod.2025.115280","url":null,"abstract":"<div><div>This work aims to evaluate the influence of defective nanostructured alumina supports on the catalytic performance of the solids in the TRM reaction. The synergistic effects between NiPt nanoparticles on the nanostructured alumina support is also examined. Depending on the promoter added to the nanostructured alumina <em>i.e.,</em> Zn, Mg or La, stable spinel phases or solid solutions with abundant intrinsic oxygen defects are formed. For NiPt/Al₂Zn_xO_y and NiPt/Al₂La_xO_y, enriched PtO_x and NiO nanoparticles microenvironments surrounding the defective support facilitate oxygen diffusion within the crystal lattice to the NiPt surface, which appeared to be the reason for the activity of the solids in the reaction. The NiPt/Al₂Mg_xO_y formed a NiO-MgO solid solution and out layer spinel phases, in which the presence of lattice oxygen species and extended defects helped by the accessible NiPt alloy on the support surface gave a strong metal-support interaction. This results in an improvement of the methane and CO₂ conversions of 75 and 95 % at H₂/CO ratio of 1.3.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"454 ","pages":"Article 115280"},"PeriodicalIF":5.2,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143685856","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":"TiO2-Ag nanostructured photocatalyst for viral inactivation: A preliminary study using protein models","authors":"Elisabetta Roberto ,&nbsp;Ilaria De Pasquale ,&nbsp;Massimo Dell’Edera ,&nbsp;Nicoletta Depalo ,&nbsp;Elisabetta Fanizza ,&nbsp;Roberto Comparelli ,&nbsp;Maria Lucia Curri","doi":"10.1016/j.cattod.2025.115278","DOIUrl":"10.1016/j.cattod.2025.115278","url":null,"abstract":"<div><div>The rapid emergence of viral infections, such as SARS-CoV-2, underscores the urgent need for innovative antiviral strategies. This study explores the photocatalytic effectiveness of synthesized mesoporous mTiO₂-Ag nanostructures in denaturing viral proteins, thereby inhibiting viral spread. Utilizing protein models, specifically bovine serum albumin (BSA) and the spike protein subunit S1 (S1SP) of SARS-CoV-2, we evaluated the nanocomposite's ability to degrade high molecular weight proteins, simulating the interactions between photocatalysts and viral proteins. Our findings indicate that the mTiO₂-Ag nanocomposite exhibits enhanced photocatalytic performance, effectively disrupting viral structures through reactive oxygen species (ROS) generation and physical interactions. This approach not only provides insights into the mechanisms of viral inactivation, pointing out the effect of photocatalytically generated ROS, as ^•OH, but also offers a safe alternative for assessing the antiviral properties of nanomaterials without the need for handling pathogenic viruses. The results support the potential application of photocatalytic nanomaterials in disinfection strategies, promoting safer and more effective solutions for controlling viral infections in various environments.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"454 ","pages":"Article 115278"},"PeriodicalIF":5.2,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143697814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Introduction by guest editors","authors":"Sixto Malato,&nbsp;Urška Lavrenčič Štangar,&nbsp;J.Anthony Byrne","doi":"10.1016/j.cattod.2025.115279","DOIUrl":"10.1016/j.cattod.2025.115279","url":null,"abstract":"","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"454 ","pages":"Article 115279"},"PeriodicalIF":5.2,"publicationDate":"2025-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143685857","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}