Topics in Catalysis最新文献

{"title":"Studies of Ni Supported on La-Zr Mixed Oxide Catalysts for Bi-reforming of Methane with CO2 to Syngas","authors":"G. Mallikarjun,&nbsp;P. Shiva Kumar,&nbsp;K. Ranjith Kumar,&nbsp;P. Mahesh Kumar,&nbsp;P. Chandrasekhar,&nbsp;T. V. Sagar,&nbsp;N. Lingaiah","doi":"10.1007/s11244-025-02150-8","DOIUrl":"10.1007/s11244-025-02150-8","url":null,"abstract":"<div><p>Investigation of methane bi-reforming over Ni-impregnated La₂O₃-ZrO₂ mixed oxide catalysts to produce hydrogen-rich syngas. A series of supports with varying molar ratios of La-Zr were synthesized using the co-precipitation method, and the metal addition was carried out using the impregnation method. The properties of the materials are characterized by different characterization techniques such as BET, XRD, H₂-TPR, and CO₂-TPD analyses. The overall characterization illustrated that the change in the mole ratio of La₂O₃-ZrO₂ support improves catalyst performance by enhancing CO₂ adsorption and metal-support interactions and reducing carbon deposition. 12 wt% Ni loading catalyst with La₂O₃-ZrO₂ molar ratio of 3:1 showed optimal performance, yielding high methane and CO₂ conversion rates (90% and 75%, respectively) and achieving H₂ yield of 82%. Further, the catalyst demonstrated stability over a 100 h reaction time, ascribed to the strong metal-support interaction along with the change in the basicity with change in the La₂O₃, which improves the overall bi-reforming methane reactivity and enhances syngas production.</p></div>","PeriodicalId":801,"journal":{"name":"Topics in Catalysis","volume":"68 18-19","pages":"2144 - 2160"},"PeriodicalIF":3.0,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145230461","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fabrication of Sustainable ZnCo2O4 Nanoparticle for Electrochemical Sensing of N2H4 and Microbial Applications","authors":"K. Gurushantha,&nbsp;B. S. Surendra,&nbsp;T. Kiran,&nbsp;M. Bhaskar,&nbsp;S. Shashidhar,&nbsp;Swarnalata Swain,&nbsp;K. V. Brungesh,&nbsp;K. M. Girish","doi":"10.1007/s11244-025-02159-z","DOIUrl":"10.1007/s11244-025-02159-z","url":null,"abstract":"<div><p>The structural, electrochemical and microbial properties of ZnCo₂O₄ nanoparticles synthesized by low-temperature Sol-Gel technique using a precipitant agent (H₂C₂O₄·2H₂O) are detailed in this study. The study of physico-chemical properties of prepared nanoparticles were well investigated by various spectral techniques; X-ray diffraction (XRD) patterns shows the crystallinity and spinel cubic (Fd3m) configuration with average particle sizes of ∼ 17–19 nm calculated by Scherrer’s process. With support of SEM, HR-TEM and SAED analysis confirmed its morphological development in configuration and particle sizes. The optical analysis of ZnCo₂O₄ nanoparticles were recorded to be 4.63 to 4.9 eV by plotting energy (hν) v/s [F(R)hv]² from Kubelka–Munk activity. The electrochemical examinations modified glassy carbon electrode with ZnCo₂O₄ (200 ^oC) nanoparticle was achieved by cyclic voltammetry method at different scan rate of 1-5mV/s. The excellent electrochemical sensing action against N₂H₄ molecule at 10 mM concentration was recorded in a phosphate buffer solution of pH 7.4 and its limit of detection was calculated to be 0.3 µM. The antibacterial activities of both as-formed and calcined at 200, 400 and 600 ^oC of ZnCo₂O₄ NPs (50 µl) were tested against gram positive Bacillus and gram negative Pseudomonas isolates using Muller Hinton agar plates.</p></div>","PeriodicalId":801,"journal":{"name":"Topics in Catalysis","volume":"69 8-11","pages":"1542 - 1555"},"PeriodicalIF":3.0,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Relationship between Physicochemical Properties and Toluene Oxidation Performance of the CeOx–CrOx Catalysts","authors":"Dong Ye,&nbsp;Xiaoxiang Wang,&nbsp;Kai Zhu,&nbsp;Ke Wu","doi":"10.1007/s11244-025-02152-6","DOIUrl":"10.1007/s11244-025-02152-6","url":null,"abstract":"<div><p>A series of CeO_<i>x</i>–CrO_<i>x</i> catalysts were synthesized via the sol-gel method for the oxidation of toluene. A comprehensive set of characterization techniques, including XRD, N₂ adsorption, Raman spectroscopy, HRTEM, H₂-TPR, O₂-TPD, XPS, and in situ DRIFTS, was employed to investigate the structure-performance relationships of the catalysts. Among the catalysts, the one with a Ce/Cr molar ratio of 1:3 exhibited the best performance in toluene oxidation, with the activation energy for toluene degradation decreasing from 54.5 kJ mol⁻¹ for CeO_<i>x</i> to 31.3 kJ mol⁻¹ for the CeO_<i>x</i>–CrO_<i>x</i> (1:3) and CO₂ selectivity reaching 100% at temperatures above 250 °C. This enhancement was primarily attributed to an increased specific surface area, an elevated concentration of highly active Cr⁶⁺ species, and improved reducibility and mobility of surface oxygen species. During the reaction, toluene was rapidly adsorbed and converted into benzoate intermediates, which were subsequently oxidized to form the final products, CO₂ and H₂O.</p></div>","PeriodicalId":801,"journal":{"name":"Topics in Catalysis","volume":"68 18-19","pages":"2078 - 2088"},"PeriodicalIF":3.0,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145230323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigating the Influence of Aluminum Doping on the Structural, Kinetic, Thermodynamics, and Isothermal Properties of AlxZn0.7Mn0.3Fe2−xO4 Soft Ferrite for the Removal of Dyes from Wastewater","authors":"Mehnaz Ayoub,&nbsp;Harmanjit Singh Dosanjh","doi":"10.1007/s11244-025-02153-5","DOIUrl":"10.1007/s11244-025-02153-5","url":null,"abstract":"<div><p>This research paper outlines the synthesis of Al-doped ferrite, (Al_xZn_0.7Mn_0.3Fe_2−xO₄), with varying ‘x’ values (0.1, 0.3, 0.5, 0.7, and 0.9) using the solution combustion method. The main focus is on the application of these prepared ferrites for removing dyes from wastewater. Various physicochemical techniques were employed to examine the morphological and structural properties of these ferrites. Subsequently, these new ferrite materials were used to adsorb different cationic and anionic dyes. The results of these experiments were analyzed and recorded through UV-visible spectroscopy. Different adsorption models were employed for the analysis of adsorption isotherms. The Freundlich isotherm represented the finest match to the investigated data (R² = 0.996). Pseudo first order (PFO) and pseudo second order (PSO) adsorption kinetics were applied to understand the process of adsorption. The PSO kinetics showed best fit for regression model, (R² = 0.973, 0.9851, 0.9852 &amp; 0.9854), which is more suitable for the data. The nature of this adsorption process was ascertained by calculating thermodynamic parameters like enthalpy, Gibbs free energy, and entropy changes. According to the findings, Al-doped ferrite has strong adsorption capabilities and advantageous thermodynamic characteristics, which make it an appropriate alternative to eliminating dyes from industrial effluents. By giving light to the adsorption processes and possible uses of Al-doped ferrite in environmental remediation, the work advances the area.</p></div>","PeriodicalId":801,"journal":{"name":"Topics in Catalysis","volume":"69 4-7","pages":"583 - 597"},"PeriodicalIF":3.0,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147339507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Next-Generation Nanophotocatalyst for Ultra-Efficient and Sustainable Azithromycin Decontamination: A Breakthrough Strategy for Visible-Light-Driven Pharmaceutical Waste Treatment","authors":"Mohammad Mehdi Sadughi,&nbsp;Mehdi Hosseini,&nbsp;Karem Gallardo","doi":"10.1007/s11244-025-02140-w","DOIUrl":"10.1007/s11244-025-02140-w","url":null,"abstract":"<div><p>The presence of azithromycin, a macrolide antibiotic, in aquatic environments poses a significant environmental concern due to its potential impacts on aquatic ecosystems and human health. This study proposes an eco-friendly, highly efficient and robust photodegradation process for the removal of azithromycin from aqueous samples. The photodegradation experiments were conducted under basic conditions (optimal pH ≈ 11) using a 300 W Xe lamp (λ &gt; 350 nm) with UV blocking filter. The nanocomposite displayed a nanorod-shaped sponge-like structure cobalt oxide/graphitic carbon nitride composite as the photocatalyst. The nanocomposite was synthesized and characterized using XRD, SEM, EDS, TEM, BET, and zeta potential analysis. The results demonstrated that approximately 97% of azithromycin was degraded within 60 min under visible light irradiation in the presence of the Co₃O₄/g-C₃N₄ photocatalyst. The photodegradation kinetics followed a first-order model, with a rate constant of 0.0536 1/min. BET analysis revealed that the Co₃O₄/g-C₃N₄ photocatalyst exhibits a mesoporous structure, contributing to a high specific surface area primarily attributed to the g-C₃N₄ component. The mechanistic study indicated that Co₃O₄ facilitated the generation of hydroxyl radicals (^•OH), while g-C₃N₄ promotes the formation of superoxide radicals (^•O₂⁻), thereby enhancing the overall radical generation (^•OH and ^•O₂⁻) within the Co₃O₄/g-C₃N₄ nanocomposite. These properties significantly improve the photocatalytic efficiency of the Co₃O₄/g-C₃N₄ nanocomposite in azithromycin degradation.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":801,"journal":{"name":"Topics in Catalysis","volume":"69 4-7","pages":"724 - 739"},"PeriodicalIF":3.0,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147339582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Glutathione Production from Spent Yeast of Bioethanol Manufacture: Impact of Extraction Techniques with Commercial Applicability of Biotechnological Significance","authors":"Farida Rahayu,&nbsp;Puji Setiyawan,&nbsp;Sam Alfian,&nbsp;Yusuf Helmi,&nbsp;Dimas Eko Prasetyo,&nbsp;Risa Antari,&nbsp;Muchamad Lutfi,&nbsp;Agustin Krisna Wardani,&nbsp;Atif Khurshid Wani,&nbsp;Nabi Ullah","doi":"10.1007/s11244-025-02141-9","DOIUrl":"10.1007/s11244-025-02141-9","url":null,"abstract":"<div><p>Glutathione is a tripeptide antioxidant substance that is mostly produced by yeast cells. However, reduced glutathione is synthesized by both prokaryotic and eukaryotic cells. It’s classified as a medical substance and health supplement and significanly required for both xenobiotics and drug detoxification. To make glutathione through fermentation, industries frequently utilize strains like <i>Saccharomyces cerevisiae</i>. This is accomplished by incorporating carbon-rich substrates and amino acids. Nevertheless, the extraction of glutathione from yeast biomass (a by-product of bioethanol production), has not been widely adopted. The objective of the study is to use chemical, physical, and biological extraction techniques to extract glutathione from yeast cell biomass. The chemical method involves the use of substances such as NaOH, ethyl acetate, and NaCl. Lysozyme and Zymolase are utilized as cell-pelisizing agents when utilizing the biological technique; the doses are 2.5 mg/L for 0, 30, 60, 90, and 120 min, respectively. In a similar manner, the physical approach utilizes water and PBS solvents, both having a pH of 7.2, and subjects them to ultrasonication for different durations ranging from 0 to 120 min. The most effective method for extracting glutathione is through biological means. A NaOH solvent should be used at a concentration of 20.78 mg/L for a duration of 120 min. The concentration of glutathione obtained through physical methods is 20.59 mg/L, whereas the highest concentration of 31.08 mg/L is achieved through biological methods after an incubation period of 120 min. The glutathione yield obtained from this biological extraction method is 0.4% in 100 mg of dry yeast.</p></div>","PeriodicalId":801,"journal":{"name":"Topics in Catalysis","volume":"69 4-7","pages":"533 - 544"},"PeriodicalIF":3.0,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147338835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modulation of Oxygen Vacancies and Surface Acidity in MnxCeyO Catalysts via Microemulsion Enhances the Catalytic Ozonation of p-xylene","authors":"Qi Jiang,&nbsp;He Zhao,&nbsp;Zhongjun Xu,&nbsp;Song Zhang,&nbsp;Shaobo Chen,&nbsp;Guangxiao Zhu","doi":"10.1007/s11244-025-02149-1","DOIUrl":"10.1007/s11244-025-02149-1","url":null,"abstract":"<div><p>P-xylene (PX), a compound with high photochemical activity, is widely used in the production of polyester fibers, resins, paints, dyes, and pesticides. Catalytic ozonation technology effectively degrades PX at low temperatures. The oxygen vacancy density and surface acidity of Mn_xCe_yO catalysts were modulated using a microemulsion method. The results revealed that the structural defects formed in the Mn/Ce composite oxides enhanced the oxygen vacancies on the catalysts. By adjusting the Mn/Ce molar ratio and the W/O (water/oil) mass ratio in the microemulsion, Mn_xCe_yO catalysts enriched with oxygen vacancies and surface acidic sites were obtained. The optimal microemulsion conditions were identified as a Mn/Ce molar ratio of 1 and a W/O mass ratio of 0.2. The catalyst exhibited excellent catalytic performance, achieving p-xylene (PX) conversion and mineralization rates of approximately 100% and 72%, respectively. The proposed mechanism of catalytic ozonation suggests that the benzene ring of PX was broken by O₃ activated on the catalyst, and the produced intermediate gradually demethylated to form a series of chain alkanes, which were oxidized to ketones and aldehydes compounds and finally decomposed to CO₂ and H₂O.</p></div>","PeriodicalId":801,"journal":{"name":"Topics in Catalysis","volume":"69 4-7","pages":"557 - 567"},"PeriodicalIF":3.0,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147338375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Correction: Editorial","authors":"Jorge Noé Díaz de León Hernández,&nbsp;Sara Núñez Correa,&nbsp;Trino Armando Zepeda Partida,&nbsp;Trino Armando Zepeda Partida","doi":"10.1007/s11244-025-02148-2","DOIUrl":"10.1007/s11244-025-02148-2","url":null,"abstract":"","PeriodicalId":801,"journal":{"name":"Topics in Catalysis","volume":"68 14-15","pages":"1610 - 1610"},"PeriodicalIF":3.0,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145121732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Robust Bifunctional Electrocatalyst with Crystalline-Amorphous Interfaces toward Oxygen Reduction/Evolution Reactions","authors":"Suranjana Patowary,&nbsp;Bhugendra Chutia,&nbsp;Pragya Moni Gogoi,&nbsp;Pankaj Bharali","doi":"10.1007/s11244-025-02147-3","DOIUrl":"10.1007/s11244-025-02147-3","url":null,"abstract":"<div><p>This work reports the successful synthesis of a highly stable and durable non-PGM catalyst Co₃O₄/Co_xCe_1−xO_2−δ/C via a simple solvothermal process. The electrocatalytic ability of Co₃O₄/C, CeO₂/C and Co₃O₄/Co_xCe_1−xO_2−δ/C are tested for oxygen reduction and oxygen evolution reaction (ORR, OER). Under identical conditions, the electrochemical studies of the catalysts reveal enhanced performance of the Co₃O₄/Co_xCe_1−xO_2−δ/C. It shows the highest geometric current density (j_geo = ̶ 4.1 mAcm⁻² ) at 0.33 V vs. RHE. Moreover, Co₃O₄/Co_xCe_1−xO_2−δ/C has the earliest onset for OER with a bifunctionality index of ΔE = 1.05 V and has the highest turnover frequency. The catalyst was compared with benchmarks like 20 wt% Pt/C for ORR and RuO₂ for OER. Chronoamperometry studies (CA) reveals superior performance of Co₃O₄/Co_xCe_1−xO_2−δ/C over Pt/C for ORR and accelerated durability test (ADT) shows no observable shift of half-wave potential (E_1/2). This enhancement of electrocatalytic ability of Co₃O₄/Co_xCe_1−xO_2−δ/C are attributed to (1) higher degree of Co²⁺:Co³⁺ ratio (3.6) in Co₃O₄/Co_xCe_1−xO_2−δ/C than in Co₃O₄/C (0.8) as revealed from XPS. This is a result of doping of cobalt into CeO₂, and (2) presence of crystalline-amorphous interfaces as observed from HRTEM.</p></div>","PeriodicalId":801,"journal":{"name":"Topics in Catalysis","volume":"68 18-19","pages":"2269 - 2280"},"PeriodicalIF":3.0,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145230291","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Catalytic CO2 Methanation Over Modified Carbon-Supported Ruthenium: The Influence of the Support Type on the Properties and Activity of the Catalyst","authors":"Elżbieta Truszkiewicz,&nbsp;Katarzyna Klimaszewska,&nbsp;Eliza Gauze,&nbsp;Zuzanna Gronkiewicz,&nbsp;Andrzej Ostrowski,&nbsp;Arkadiusz Gertych,&nbsp;Dominik Wierzbicki,&nbsp;Ivo Alxneit","doi":"10.1007/s11244-025-02144-6","DOIUrl":"10.1007/s11244-025-02144-6","url":null,"abstract":"<div><p>The influence of the type of carbon support on the catalytic activity of Ru/graphitized carbon systems in carbon dioxide methanation was evaluated. Four partly graphitized carbons with varying surface areas (from 50 to 1417 m²/g) were used as supports. The prepared samples were characterized by N₂ physisorption, TG-MS studies, H₂-TPR, CO₂-TPD, XRD, XAS, TEM/STEM, Raman spectroscopy and CO chemisorption. Both the mode of particle size distribution and the dispersion of the active phase clearly depend on the carbon texture; dispersion changes from 27% to almost 90% with increasing carbon support surface area. The degree of support graphitization affects its resistance to undesired methanation under reaction conditions. The activity tests conducted in a model H₂–rich stream with very low CO₂ concentration (1 vol% CO₂) show that the catalysts exhibit good activity, achieving a 20% conversion of CO₂ at a temperature of 270 °C. The increase of the average Ru particle size leads to about sevenfold increase in the CO₂ conversion and a nearly 20-fold increase in TOF values. The catalytic activity or Ru/carbon catalysts is also associated with the presence of basic sites on their surface.</p></div>","PeriodicalId":801,"journal":{"name":"Topics in Catalysis","volume":"68 20","pages":"2445 - 2461"},"PeriodicalIF":3.0,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11244-025-02144-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145675597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}