Topics in Catalysis最新文献

{"title":"Co/Zn MOF@rGO Hybrid Composite as a Highly Selective and Sensitive Non-enzymatic Electrochemical Glucose Sensor","authors":"Burragoni Sravanthi Goud,&nbsp;Satyanarayana Moru,&nbsp;Saravanan Pandiaraj,&nbsp;Ramachandra Naik,&nbsp;Prabhakar Thota,&nbsp;Ganesh Koyyada,&nbsp;Jae Hong Kim","doi":"10.1007/s11244-025-02240-7","DOIUrl":"10.1007/s11244-025-02240-7","url":null,"abstract":"<div><p>Non-enzymatic glucose sensors with promising electrochemical activity, high sensitivity, selectivity and stability are booming in a variety of fields. Herein, we have successfully synthesized the Co and Co/Zn-MOF materials and evaluated for the glucose sensing application. The successful preparation of Co and Co/Zn-MOF were confirmed by using the XRD, XPS, SEM and FT-IR characterizations. The detailed N₂ adsorption-desorption analysis has revealed the higher surface area, pore size and volume for the Co/Zn-MOF compared to Co-MOF. Remarkably, the Co/Zn-MOF@rGO showed higher sensing ability with a limit of detection (LOD) of 0.67 µM compared to that of the Co-MOF with an LOD of 1.65 µM. The lowest LOD of Co/Zn MOF@rGO might be due to the enhanced surface area and charge transportation. The as-prepared Co/Zn MOF@rGO has exhibited superior electrocatalytic glucose-sensing ability with remarkable stability and selectivity. Finally, the developed sensor has been tested for quantification of glucose from real sweat samples and results were obtained with good recoveries. The rGo-Co/Zn MOF hybrid composite, developed as a highly selective and sensitive non-enzymatic electrochemical glucose sensor, holds promise for continuous metabolic monitoring in disability research, where glucose regulation critically impacts health and rehabilitation outcomes.</p></div>","PeriodicalId":801,"journal":{"name":"Topics in Catalysis","volume":"69 8-11","pages":"1303 - 1312"},"PeriodicalIF":3.0,"publicationDate":"2025-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579250","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":"Utilizing Cobalt Nanoparticles on Graphene Oxide Enhanced with MIL-100@Co Metal-Organic Framework in PAOCl Electrolyte as an SO2-Trapping for C-H Activation Electro-Organic Synthesis of Sulfonamides","authors":"Waleed Al-Azzawi,&nbsp;Abdulrahman A. Almehizia,&nbsp;Zaman Abdalhussein Ibadi Alaridhee,&nbsp;Mohammed B. Alqaraguly,&nbsp;Amer Alhaj Zen,&nbsp;Abdulqader Faris Abdulqader,&nbsp;Mohammed S. Nawrooz,&nbsp;Waam Mohammed Taher,&nbsp;Mariem Alwan,&nbsp;Rustamkhon Kuryazov,&nbsp;Elyor Berdimurodov,&nbsp;Jalilov Fazliddin,&nbsp;Hijran Sanaan Jabbar","doi":"10.1007/s11244-025-02216-7","DOIUrl":"10.1007/s11244-025-02216-7","url":null,"abstract":"<div><p>Traditional electro-organic synthesis methods for sulfonamides often suffer from low catalytic efficiency, long reaction times, and the use of environmentally harmful reagents, limiting their practical applications and sustainability. This study explores the utilization of cobalt nanoparticles supported on GO enhanced with the MIL-100@Co MOF in a PAOCl as an electrolyte and SO₂ trapping agent for the electro-catalytic synthesis of sulfonamides <i>via</i> C-H activation reaction. The synthesized catalyst was characterized utilizing various analytical techniques, including FT-IR, BET, SEM, EDS, EDX mapping, TGA, CV, and XPS, to confirm its structural integrity and elemental composition. The catalytic performance was evaluated in terms of yield and reaction time, demonstrating an impressive 92–97%yield of sulfonamides <b>4(a-k)</b> within just 45 min at ambient temperature and atmospheric pressure, using a current of 10 mA. This performance surpasses that of traditional methods employing other cathode materials, which often suffer from low yields and prolonged reaction times. The incorporation of Co nanoparticles enhances catalytic efficiency, while PAOCl serves as both an electrolyte and SO₂ trapping agent. Additionally, the MIL-100@Co MOF provides a robust support structure with a high surface area, improving reactivity in the electrochemical environment. Overall, this work highlights the potential of MIL-100@Co MOF composites in a PAOCl as effective catalytic system for sustainable sulfonamides <b>4(a-k)</b> synthesis in electrochemical applications.</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 1-3","pages":"422 - 442"},"PeriodicalIF":3.0,"publicationDate":"2025-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145983231","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":"CaTiO3/TiO2 Nanocomposite: Easy Synthesis, Structure, Optical and Photocatalytic Activity","authors":"V. Gopika,&nbsp;P. Nivetha,&nbsp;R. Suresh,&nbsp;N. Jayaprakash,&nbsp;Thangamani Arumugam,&nbsp;Pandian Bothi Raja","doi":"10.1007/s11244-025-02235-4","DOIUrl":"10.1007/s11244-025-02235-4","url":null,"abstract":"<div><p>In this paper, a solid-state thermal decomposition method was used to synthesis calcium titanate (CaTiO₃)/titania (TiO₂) nanocomposite. Commercial TiO₂ and calcium oxalate (CaC₂O₄) were used as metal precursors. The sample was characterized by various spectroscopic and microscopic techniques. The formation of CaTiO₃/TiO₂ nanocomposite was ascertained by XRD, FTIR, XPS, FESEM and HRTEM analysis. Light harvesting capacity, band gap and luminescence features of CaTiO₃/TiO₂ nanocomposite were determined by UV-Visible and photoluminescence (PL) spectroscopies. The thermal stability of CaTiO₃/TiO₂ nanocomposite was examined by thermogravimetric-differential thermal analysis (TG-DTA). Photocatalytic activity of CaTiO₃/TiO₂ nanocomposite was assessed by using ultraviolet (UV)-induced methylene blue degradation along with hydrogen peroxide (H₂O₂) as an oxidant. The nanocomposite showed 96.5% efficiency within 120 min under UV/H₂O₂, whereas 26.3% efficiency was obtained under only ultraviolet light (without H₂O₂). The possible reactive species involved in the CaTiO₃/TiO₂-catalysed reaction was determined. The recyclability of the photocatalyst has also been tested. CaTiO₃/TiO₂ nanocomposite might have great application in water purification.</p></div>","PeriodicalId":801,"journal":{"name":"Topics in Catalysis","volume":"69 8-11","pages":"1293 - 1302"},"PeriodicalIF":3.0,"publicationDate":"2025-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579655","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":"Bio-utilization Synthesis of Fe Doped Bismuth Zirconate Mediated by Menthaspicata L. for Photocatalytic, Antibacterial and Electrochemical Applications","authors":"K. Pompapathi,&nbsp;K. S. Anantharaju,&nbsp;S. Meena,&nbsp;B. S. Surendra,&nbsp;B. Uma,&nbsp;Arpita Paul Chowdhury","doi":"10.1007/s11244-025-02219-4","DOIUrl":"10.1007/s11244-025-02219-4","url":null,"abstract":"<div><p>Synthesis and systematic characterization of BZOP: Fe (0–9 mol%) nanomaterials (NMs) was done; it is also applied in photocatalytic activity, antibacterial activity and electrochemical sensing. The composition was found to be monoclinic microstructure as shown by X-ray diffraction (XRD) with a size of crystallites lying between 30.4 and 45.8 nm depending on the concentration of Fe doping. SEM and TEM measurements demonstrated a homogeneous morphology, whereas the existence of the elements including Bi, Zr, Fe, and O was approved by EDS and XPS measurements. An examination of functional groups was done on FTIR, and optical band gap was found to reduce with further addition of Fe with a range of 2.33 to 2.09 eV using UV–Vis spectroscopy. Of all the compositions, BZOP: Fe (5 mol%) showed photo catalytic degradation efficiency of 96% and 98% in case of Methylene blue (MB) and Rhodamine B (RB) dye, respectively. There were better results in antibacterial culture, whether in Gram-negative bacteria or Gram-positive bacteria. Electrochemical analysis through cyclic voltammetry suggested pseudocapacitance with an increased specific capacitance in case of 5 mol% of Fe doping. The NMs were also showed elevated sensitivity in the detection of dextrose and Pb²⁺ ions even in low concentration as 5 mM. These findings emphasize the potential role of nanotechnology in resolving some of the major issues in the environment by identifying BZOP: Fe (5 mol%) as a multifunctional material in environmental remediation and bio sensing.</p></div>","PeriodicalId":801,"journal":{"name":"Topics in Catalysis","volume":"69 8-11","pages":"1131 - 1151"},"PeriodicalIF":3.0,"publicationDate":"2025-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579603","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":"C-H Activation with Cu(I) MOFs: The Pertinence of Natural-Like Active Centres and Their Facile Modification","authors":"Rafael Cortez Sgroi Pupo,&nbsp;Beatrice Garetto,&nbsp;Mouhammad Abu Rasheed,&nbsp;Ning Cao,&nbsp;Bjørnar Arstad,&nbsp;Frédérique Pourpoint,&nbsp;Erlend Aunan,&nbsp;Silvia Bordiga,&nbsp;Unni Olsbye,&nbsp;Ainara Nova,&nbsp;Elisa Borfecchia,&nbsp;Petra Ágota Szilágyi","doi":"10.1007/s11244-025-02218-5","DOIUrl":"10.1007/s11244-025-02218-5","url":null,"abstract":"<div><p>The easy modulation of the first and second ligand spheres of the redox active centres in heterogenised enzyme-inspired catalysts is highly desirable for speeding up <i>de-novo</i> design and optimisation. In this study, we employ metal-organic framework (MOF) hosts, capable of emulating enzyme-like heterogenised Cu(I) active sites to study their catalytic performance. By leveraging on a post-synthetic modification (PSM) strategy, we modified the microenvironment around copper centres within the selected UiO-67 MOFs, thereby mimicking functionalities typical of enzymatic systems. In order to assess the feasibility of a facile modulation of the microenvironment around the active centre without recourse to organic chemistry approaches, our strategy also involved the incorporation of secondary guest molecules into the MOF matrix, such as phenol and propionamide. Through a thorough combined theoretical-experimental study, we demonstrate that the selected propionamide molecule coordinates to the redox-active cuprous centre, whereas phenol does not get adsorbed into the matrix. The synthesised materials were tested for a C–H activation reaction using cyclohexene as a model substrate and tert-butyl hydroperoxide (<i>t</i>BuOOH) as oxidant, under aerobic conditions. The cuprous ions coordinated to the enzyme-like motifs showed catalytic activity for cyclohexene oxidation, and in addition, showed better performance compared with its cupric counterpart. The catalytic performance of the materials modulated with propionamide however was not significantly different from the parent catalyst, on account of the swift removal of the secondary guest molecule under reaction conditions.</p></div>","PeriodicalId":801,"journal":{"name":"Topics in Catalysis","volume":"68 20","pages":"2375 - 2392"},"PeriodicalIF":3.0,"publicationDate":"2025-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11244-025-02218-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145675660","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}

{"title":"Catalytic Reduction of Organic Pollutants and Anticancerous Activity of Eco-Friendly Synthesized ZnO Nanoparticles Using Dill Seed Extract","authors":"Guddappa Halligudra,&nbsp;Chitrabanu C. Paramesh,&nbsp;Amulya Giridasappa,&nbsp;Chetana Sabbanahalli,&nbsp;Kunal Roy,&nbsp;Madhusudhana Ramanna,&nbsp;Dinesh Rangappa,&nbsp;Prasanna Daddakunche Shivaramu","doi":"10.1007/s11244-025-02236-3","DOIUrl":"10.1007/s11244-025-02236-3","url":null,"abstract":"<div><p>In the current situation, organic dyes are the potential candidates that contribute to pollution in water, and their degradation still poses a challenging question to scientists. Materials in the Nano-sized regime are attracting focused interest as they inherit enhanced features for their efficacy, feasibility, and go-green properties, initiating the drive for the present research. The present work focuses on the synthesis of ZnO nanoparticles using dill <i>(Anethum graveolens)</i> seed extract using an eco-friendly method. The obtained nanoparticles were analyzed using XRD, FT-IR, SEM, and EDX analysis to evaluate their structure, morphology, and phase composition. ZnO nanoparticles synthesized were employed for the catalytic reduction of dyes and anticancer activity. The nanoparticles displayed better catalytic activity, achieving the complete degradation of organic dyes, namely, methylene blue, congo red, 2-chloro-4-nitrophenol, and o-nitrobenzoic acid, within 10, 6, 12, and 15 min, respectively, with a low catalyst loading of 2 mg. This resulted in rate constants of 0.260, 0.237, 0.118, and 0.061 min^-1, with reduction efficiencies of 98%, 96%, 84%, and 90%, respectively, for each of the dyes. The reduced o-aminobenzoic acid from o-nitrobenzoic acid was isolated and confirmed by ¹H NMR spectroscopy. A good recovery yield was observed for the prepared materials, which maintained their catalytic activity over 5 cycles with a minimal decrease in performance. The ZnO nanoparticles also exhibited dose-dependent antiproliferative effects on human colon cancer cells, i.e., HCT116 cells, with an IC₅₀ of 12.07 <i>±</i> 0.53 µg/mL, demonstrating significant anticancer effects.</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 8-11","pages":"1493 - 1507"},"PeriodicalIF":3.0,"publicationDate":"2025-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579316","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":"Graphene Oxide-Embedded Isotype g-C3N4/g-C3N4 Heterojunction for the Deterioration of Pharmaceutical Waste and Dyes","authors":"Karishma Behare,&nbsp;Gunvant Sonawane,&nbsp;Prakash Labhane","doi":"10.1007/s11244-025-02238-1","DOIUrl":"10.1007/s11244-025-02238-1","url":null,"abstract":"<div><p>The present study reports the development of g-C₃N₄/g-C₃N₄ isotype heterojunction embedded on graphene oxide (GO) for the photodegradation of pharmaceutical waste and organic dyes. Initially, the g-C₃N₄/g-C₃N₄ isotype heterojunction was prepared by thermal treatment using two different precursors, and subsequently embedded onto GO by a sonication-assisted solvothermal method. The successful synthesis and properties of the material were confirmed by various characterization techniques, including XRD, UV-Vis DRS, FESEM, HR-TEM XPS and BET. The strong compatibility and well-aligned band structure of the g-C₃N₄/g-C₃N₄ isotype heterojunction offers a cost-effective strategy conquer the rapid recombination of photogenerated charge pairs, which is frequently observed in pristine g-C₃N₄, a potential metal-free photocatalyst. Incorporating the g-C₃N₄/g-C₃N₄ isotype heterojunctions onto GO sheets results to the formation of a ternary photocatalyst (g-C₃N₄/g-C₃N₄@GO) with high efficiency in degradation of pharmaceutical waste and organic dyes. The superior photocatalytic efficacy of hybrid ternary g-C₃N₄/g-C₃N₄@GO nanocomposite is primarily due to its enhanced surface area and improved separation of photogenerated electron-hole pairs. The study presents comprehensive synthesis, characterization and evaluation of the photocatalytic potential of the ternary isotype heterojunction, aiming to develop a metal-free catalytic approach for environmental remediations within the broader context of sustainable development.</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 1-3","pages":"13 - 25"},"PeriodicalIF":3.0,"publicationDate":"2025-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145983054","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":"Advanced Assembly of Spherical MoO3–SnO2 Nanocomposite Material and Its Catalytic Applications","authors":"A. Mohamed Ibraheem,&nbsp;K. Jayamoorthy,&nbsp;J. Kamalakkannan,&nbsp;G. Selvakumar,&nbsp;D. Rajamanickam","doi":"10.1007/s11244-025-02233-6","DOIUrl":"10.1007/s11244-025-02233-6","url":null,"abstract":"<div><p>A spherical MoO₃–SnO₂ nanocomposite was synthesized via a precipitation–sonication approach and thoroughly characterized to evaluate its structural, optical, and catalytic properties. XRD, SEM-EDX, and HR-TEM analyses confirmed the formation of a crystalline spherical nanostructure with uniform particle distribution. DRS spectra indicated a reduced band gap of 3.25 eV compared to 3.5 eV for pure SnO₂, while photoluminescence studies revealed suppressed electron–hole recombination, confirming improved charge separation. The nanocomposite demonstrated remarkable photocatalytic performance toward the degradation of Naphthol Blue Black (NBB) dye under UV light, achieving 84% degradation within 45 min at neutral pH, significantly higher than the 59% achieved with SnO₂. The material retained 90% of its activity after four reuse cycles, highlighting excellent stability and reusability. COD analysis confirmed efficient dye mineralization with evidence of CO₂ capture. Additionally, electrochemical studies revealed enhanced anodic current and superior electrocatalytic activity in dye-sensitized solar cells, attaining an efficiency of 1.7%. Overall, the synergistic interaction between MoO₃ and SnO₂ enhances charge transfer, optical absorption, and catalytic efficiency, making this nanocomposite a versatile material for environmental remediation, green synthesis, and renewable energy applications.</p></div>","PeriodicalId":801,"journal":{"name":"Topics in Catalysis","volume":"69 4-7","pages":"1074 - 1088"},"PeriodicalIF":3.0,"publicationDate":"2025-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147340036","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":"Iron Oxide Nanoparticles for Catalytic Applications: Synthesis, Characterization, and Environmental Performance","authors":"Shaikh Mohd. Waseem,&nbsp;Sourabh Vitthal Gaikwad,&nbsp;Vishal Ashok Pandit,&nbsp;Nilkanth N. Kapse","doi":"10.1007/s11244-025-02204-x","DOIUrl":"10.1007/s11244-025-02204-x","url":null,"abstract":"<div><p>Iron oxide nanoparticles (IONPs) have gained immense interest for their catalytic efficiency, magnetic recoverability, and environmental compatibility. This review focuses on the green synthesis of IONPs using plant-based extracts and biogenic routes that offer a safer and sustainable alternative to conventional chemical methods. Various characterization techniques such as FTIR, SEM, XRD, and VSM are explored to understand the structure, functionality, and magnetism of synthesized nanoparticles. The catalytic applications of IONPs are highlighted, particularly in contaminant removal and dye degradation, emphasizing their role in wastewater remediation. The regeneration and recovery of IONPs are also discussed, demonstrating that IONPs can be regenerated and reused by chemical desorption, surface washing, and microwave-assisted strategies. In addition, the scale-up, long-term environmental benignity and the technical application of IONPs in practical system are examined. The extensive studies in this review are expected to help researchers move toward to fabricating low-cost, reusable, and green iron oxide nanomaterials.</p></div>","PeriodicalId":801,"journal":{"name":"Topics in Catalysis","volume":"69 8-11","pages":"1337 - 1360"},"PeriodicalIF":3.0,"publicationDate":"2025-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579509","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":"CeO₂ Nanorod-Promoted NiCu and NiFe Nanoparticles for Enhanced Ethanol Electrooxidation in Alkaline Medium","authors":"Emine Sena Kazan-Kaya,&nbsp;Mahmut Bayramoğlu","doi":"10.1007/s11244-025-02228-3","DOIUrl":"10.1007/s11244-025-02228-3","url":null,"abstract":"<div><p>In this study, NiCu and NiFe based electrocatalysts cocatalyzed with CeO₂ nanorods for ethanol electrooxidation reaction (EOR) in alkaline medium were synthesized and their electrochemical performances were investigated in detail. In all samples, the amount of CeO₂ nanorods was kept constant (20 wt%), and the ratios of Ni and second metal (Cu or Fe) were systematically changed. The obtained nanoparticles were characterized by X-ray diffraction (XRD), scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). Electrochemical performance evaluations were carried out by cyclic voltammetry (CV), linear sweep voltammetry (LSV) and chronoamperometry (CA) methods. EOR activities of catalysts with different Ni: Cu and Ni: Fe ratios were compared and the highest performing compositions were determined for each system. According to CV analysis, NiCu-CeO_2NRs-2 had the highest current density (21.63 mA cm⁻²) and the lowest onset potential (444 mV) among Cu-containing combinations. Among Fe-containing combinations, NiFe-CeO_2NRs-2 was observed as the best performing catalyst combination with a current density of 27.71 mV cm⁻² and an onset potential of 387 mV. The effect of temperature on electrocatalytic activity was also investigated by electrochemical measurements at different temperatures on catalysts with these optimum compositions. The study reveals the effect of different metal ratios and temperature conditions on EOR performance and evaluates the performance potential of NiCu and NiFe based systems cocatalyzed with CeO₂.</p></div>","PeriodicalId":801,"journal":{"name":"Topics in Catalysis","volume":"69 1-3","pages":"26 - 42"},"PeriodicalIF":3.0,"publicationDate":"2025-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145982682","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}