Catalysis Letters最新文献

{"title":"Enhanced Catalytic Performance of Egyptian Red Clay Modified with Zirconia Nanoparticles for Methanol Dehydration to Dimethyl Ether","authors":"Abd El-Aziz A. Said,&nbsp;Mohamed Abd El-Aal,&nbsp;Asmaa Mohamed,&nbsp;Mohamed N. Goda","doi":"10.1007/s10562-025-04959-0","DOIUrl":"10.1007/s10562-025-04959-0","url":null,"abstract":"<div><p>In this study, Egyptian red clay (ERC) was modified with various percentages of ZrO₂ nanoparticles using a chemical precipitation method to test its effectiveness for methanol dehydration into dimethyl ether (DME). The most active catalyst was treated with 5–10 wt. % SO₄²⁻ via impregnation. The physicochemical characteristics of the catalysts were examined using XRD, XRF, FTIR, N₂-sorption, and TEM analysis. Catalyst acidity was assessed through isopropyl alcohol dehydration and interactions with pyridine and 2,6-dimethyl pyridine. Results demonstrated that, the catalytic performance of the ERC was greatly influenced with % ZrO₂, catalyst weight and sulfation process. The 7% SO₄²⁻/20% ZrO₂/ERC catalyst offered a maximum DME yield of ~ 94% at 250 °C with 100% selectivity to DME. This catalyst offered a long-term stability over seven days with almost the same activity and selectivity. Brønsted acidic sites with weak and intermediate strengths were responsible for such enhancement. Our findings highlight the critical roles of specific surface area and acidity in enhancing catalytic performance, positioning ERC-supported zirconia modified with SO₄²⁻ as a cost-effective, environmentally friendly, and recyclable catalyst for DME production.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 4","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143564486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"g-C3N4 Enhanced Fe3+/ Fe2+ Cycling to Activate PMS for Pharmaceuticals Degradation Under Solar Irradiation","authors":"Liu Cheng,&nbsp;Zhexin Zhu,&nbsp;Gangqiang Wang,&nbsp;Shiting Du","doi":"10.1007/s10562-025-04979-w","DOIUrl":"10.1007/s10562-025-04979-w","url":null,"abstract":"<div><p>Since Peroxymonosulfate (PMS) is readily available and can produce sulfate radicals with a stronger oxidation capacity, the Fenton-like system Fe²⁺/PMS has gradually replaced Fe²⁺/H₂O₂ system in organic pollutants degradation. However, the Fe³⁺/PMS system has almost no degradation effects, with the conversion of Fe²⁺ to Fe³⁺ being the rate-limiting step in the Fe³⁺/PMS system. In this paper, graphite-like phase carbon nitride (g-C₃N₄) was employed to activate PMS using trace amounts of Fe³⁺ for the treatment of water pollution under sunlight, and the Fe³⁺/g-C₃N₄/PMS system demonstrated the ability to rapidly degrade a wide range of difficult-to-degrade organic pollutants. The Fe³⁺/g-C₃N₄/PMS system was able to completely degrade carbamazepine (CBZ) within 30 min under sunlight. The fundings indicated that this system effectively improved the stringent limitations typically associated with Fenton process regarding the feed ratio of metal ions to oxidants, and could efficiently degrade CBZ across a broad pH range. In addition, the Fe³⁺ concentration of 6.17 × 10⁻⁶ M was used in the experiments to avoid the generation of large amounts of “iron sludge”. The trap burst experiments, DMSO oxidation experiments and electron paramagnetic resonance spectroscopy experiments indicated that O₂<b>·</b>⁻ and ¹O₂ exerted the major effectiveness in the photocatalytic degradation reaction of CBZ, and SO₄<b>·</b>⁻ and <b>·</b>OH jointly promoted the CBZ degradation.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 4","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143564487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ru Distribution and Activity of Ru/C Catalyst for Continuous Hydrogenation of 3,5-dimethylpyridine","authors":"Kerou Wan,&nbsp;Jie Cheng,&nbsp;Li Zhang,&nbsp;Tao Lin,&nbsp;Mingming Gao,&nbsp;Yuecun Wang,&nbsp;Tong Mou,&nbsp;Yuefeng Li","doi":"10.1007/s10562-025-04969-y","DOIUrl":"10.1007/s10562-025-04969-y","url":null,"abstract":"<div><p>3,5-Dimethylpiperidine (DPI) is a crucial fine chemical used in the pesticide industry. The selective catalytic hydrogenation of DPI is of significant importance for efficient and sustainable production. In this study, we developed a novel, clean continuous process using a trickle bed reactor (TBR) for the hydrogenation of 3,5-dimethylpyridine (DPY) to DPI. This process offers enhanced efficiency, stability, and high-quality DPI production. Via detailed investigation of the impregnation solution pH, along with the distribution and electronic state of Ru species on the Ru/C catalyst, we have revealed the key factors for influencing catalytic performance. The findings provide valuable insights for optimizing catalyst properties, leading to the successful application of Ru/C catalysts in the continuous hydrogenation of pyridine derivatives, including DPY. This work holds significant potential for efficient large-scale continuous production of DPI and related compounds.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 4","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143553813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Studies on Cobalt Nano Particles Supported on Nitrogen-Doped Carbon Catalysts for Selective Hydrogenation of Biomass Derived Furfural","authors":"Yogita,&nbsp;P. N. Anjana,&nbsp;P. Mahesh Kumar,&nbsp;K. T. Venkateshwara Rao,&nbsp;Ch. Subrahmanyam,&nbsp;N. Lingaiah","doi":"10.1007/s10562-025-04962-5","DOIUrl":"10.1007/s10562-025-04962-5","url":null,"abstract":"<p>Inexpensive Co metal-based catalysts are explored for catalytic hydrogenation reactions but their leaching, selectivity and stability issues have realistically debarred their usage. To combat this issue, this work presents stable and selective cobalt supported nitrogen-doped carbon catalysts prepared by using cellulose and melamine as sources for carbon and nitrogen, respectively and pyrolyzed at temperatures ranging from 500 to 800 °C under N₂ atmosphere. The synthesized series of catalysts was examined for hydrogenation of furfural to furfuryl alcohol at 120 °C under 2 MPa of H₂ pressure. All catalysts were characterized through different spectroscopic techniques to build their structural-activity relationship. Here, pyrolysis temperature has shown its supremacy in directing catalyst performance. The catalyst Co/NC-700 exhibited 83% furfural conversion with near 100% selectivity to furfuryl alcohol. The catalytic activity found depended on Co particle size and its crystallinity which was tuned by varying pyrolysis temperature. Pyrolysis temperatures influenced the interaction between N-doped carbon and Co metal, mesoporous structure N-doped carbon support, availability of Co nanoparticles and hydrogen spillover that contributed to the remarkable catalyst efficiency. The catalysts are easy to separate and reusable with consistent activity upon several cycles. Additionally, the extent of the Co/NC-700 catalyst was expanded to hydrogenation of various substituted aldehydes where it yielded decent to excellent yields of alcohols.</p>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 4","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143553906","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced Catalytic Efficiency of CuMn2O4 in Soot Oxidation: An Investigation into Its Synthesis and Characterization","authors":"R. Nithya,&nbsp;A. L. Vikram,&nbsp;Harshini Dasari,&nbsp;S. Nethaji","doi":"10.1007/s10562-025-04955-4","DOIUrl":"10.1007/s10562-025-04955-4","url":null,"abstract":"<p>Diesel particulate filters (DPFs) are essential in mitigating soot emissions. In this study, we synthesized a CuMn₂O₄ catalyst using three distinct methods: sol–gel, hydrothermal, and reflux. The catalysts' structural and morphological characteristics were verified through X-ray diffraction (XRD) and scanning electron microscopy (SEM), while their reducibility properties were assessed via soot-temperature-programmed reduction (TPR). Thermogravimetric analysis (TGA) was employed to evaluate the catalytic performance of each sample in soot oxidation. XRD analysis confirmed the formation of the cubic phase of CuMn₂O₄ across all synthesis methods. SEM analysis revealed varied morphologies, including coral-shaped, non-uniform-shaped, and aggregated spherical structures. Notably, the hydrothermally prepared CuMn₂O₄ exhibited a higher concentration of surface-adsorbed oxygen species, a key factor in catalytic activity. The hydrothermally prepared CuMn₂O₄ exhibited a superior soot oxidation performance due to a higher concentration of surface-adsorbed oxygen species, achieving a T_50% of 417 °C. This study highlights the potential of CuMn₂O₄ catalysts in enhancing the efficiency of DPFs, offering insights into the role of synthesis methods in optimizing catalyst properties for improved environmental applications.</p>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 4","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10562-025-04955-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis of 1,2,4-Oxadiazole Derivatives via XPhos Pd G3 Catalyzed Buchwald Coupling","authors":"Deepak Kumar,&nbsp;Suryakanta Dalai,&nbsp;Mukesh Jangir","doi":"10.1007/s10562-025-04946-5","DOIUrl":"10.1007/s10562-025-04946-5","url":null,"abstract":"<div><p>The synthesis of oxadiazole compounds is of significant interest due to their diverse applications in pharmaceuticals and materials science. This study investigates the use of XPhos Pd G3 as a catalyst in the Buchwald coupling reaction for the efficient synthesis of 1,2,4-oxadiazole derivatives. The primary objective was to develop a reliable and scalable method to produce these compounds with high yield and purity. Our results demonstrate that the XPhos Pd G3 catalyst significantly enhances the Buchwald coupling process, achieving yields of up to 81% under optimized conditions. The synthesized 1,2,4-oxadiazoles exhibited excellent structural integrity and were characterized using NMR and mass spectrometry. These findings underscore the potential of XPhos Pd G3 as a powerful catalyst in organic synthesis, paving the way for further development of oxadiazole-based compounds with potential applications in drug development and materials science. Future research will focus on exploring the scope of this method across a broader range of substrates and applications.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 4","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143521719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A High-Nickel Nanoflake Catalyst Based on NiFe-LDH and its Application in Efficient Monolithic Water Decomposition","authors":"Jing Wang,&nbsp;Xuan Wang,&nbsp;Shengwei Sun,&nbsp;Yubin Yuan,&nbsp;Tianshuo Wang,&nbsp;Zikang Zhao,&nbsp;Junshuang Zhou,&nbsp;Faming Gao","doi":"10.1007/s10562-025-04935-8","DOIUrl":"10.1007/s10562-025-04935-8","url":null,"abstract":"<div><p>As the potential of hydrogen as a clean energy source continues to be explored, water electrolysis has emerged as a crucial method for producing high-purity hydrogen. In this study, nickel-iron layered double hydroxide (NiFe-LDH) catalysts were successfully synthesized on nickel foam substrates using an “etching + electrodeposition” strategy, with performance significantly enhanced through optimization of the electrodeposition process. The Ni₉@NiFe-LDH/NF catalyst demonstrated outstanding catalytic activity, exhibiting hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) overpotentials of 172.53 mV and 239.31 mV, respectively, at a current density of 100 mA cm^− 2 in 6 M KOH solution. Tafel slope and electrochemical impedance spectroscopy (EIS) analyses revealed rapid electron transfer kinetics and low charge transfer resistance. Long-term stability tests confirmed that the catalyst displayed minimal voltage decay over 10 h, indicating excellent durability. Furthermore, in a two-electrode electrolyzer test conducted at 80 °C, the catalyst required only 1.53 V to achieve a current density of 100 mA cm^− 2. This study presents a low-cost, highly efficient, bifunctional catalyst for water electrolysis, offering promising potential for both optimization and commercial application.</p></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 4","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143521718","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis of (Fe0.2Co0.2Ni0.2Cu0.2Mn0.2)Fe2O4 High Entropy Spinel Oxide for Photo-Fenton Degradation of Oxytetracycline Hydrochloride Over a Wide pH Range","authors":"Yuxin Gan,&nbsp;Dan Liu,&nbsp;Zhipu Wang,&nbsp;Ge Huang,&nbsp;Rumei Ze,&nbsp;Xiaohong Wang,&nbsp;Jiabin Zhou","doi":"10.1007/s10562-025-04973-2","DOIUrl":"10.1007/s10562-025-04973-2","url":null,"abstract":"<div><p>Iron-based spinel oxides, with excellent catalytic activity and stability, hold promising potential in the photo-Fenton degradation of organic pollutants. In this study, (Fe_0.2Co_0.2Ni_0.2Cu_0.2Mn_0.2)Fe₂O₄ was prepared via the solution combustion method. Multiple characterization techniques confirmed the good stability and morphology of (Fe_0.2Co_0.2Ni_0.2Cu_0.2Mn_0.2)Fe₂O₄. It exhibited high-entropy oxide properties, making it suitable as a photo-Fenton catalyst for the efficient degradation of oxytetracycline hydrochloride (OTC-HCl). Under visible light (Vis) with 10 mM H₂O₂, 0.06 g/L OTC-HCl, and pH 4.0, the catalyst achieved a degradation efficiency of 92.9%. In the photo-Fenton system, the utilization rate of H₂O₂ (calculated as the ratio of the degradation amount of OTC-HCl to the consumption amount of H₂O₂) was 34.5, which is 8.3 times higher than that of pure H₂O₂ (4.2). The catalyst showed good acid–base adaptability, achieving OTC-HCl removal rates exceeding 92.0% across a pH range of 3–11, with a reaction rate constant of 0.08 min⁻¹ at pH 11. Free-radical capture experiments showed that (Fe_0.2Co_0.2Ni_0.2Cu_0.2Mn_0.2)Fe₂O₄ catalyzed H₂O₂ to generate <b>·</b>OH, <b>·</b>O₂⁻, and e⁻, which are the main free radicals involved in the degradation of OTC-HCl. In summary, (Fe_0.2Co_0.2Ni_0.2Cu_0.2Mn_0.2)Fe₂O₄ not only addresses the issue of low H₂O₂ utilization in traditional photo-Fenton systems but also catalyzes the generation of H₂O₂ under light conditions. Thus, it can serve as an excellent photo-Fenton catalyst for OTC-HCl degradation.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 4","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143521721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Metal Organic Framework-Derived Bi2O3-ZnO/TiO2 Nanofibers Catalysts for Enhanced Photodegradation of Methylene Blue","authors":"Mitra Saffari,&nbsp;Massomeh Ghorbanloo,&nbsp;Ali Morsali,&nbsp;Yiyao Gan,&nbsp;Yaorong Su","doi":"10.1007/s10562-025-04968-z","DOIUrl":"10.1007/s10562-025-04968-z","url":null,"abstract":"<div><p>This work introduces innovative Bi₂O₃-ZnO/TiO₂ (BZT) composite photocatalysts, developed via a simple electrospinning technique. The incorporation of Zn²⁺ and Bi³⁺ ions was confirmed through high-resolution transmission electron microscopy and X-ray photoelectron spectroscopy (XPS). XPS analysis confirmed the presence of Zn and Bi elements on the surface of TiO₂ nanofibers, with oxidation states of + II and + III, respectively. The band gaps, estimated through the Kubelka–Munk function and ultraviolet-visible diffuse reflectance spectroscopy, decreased from 3.18 eV for pristine TiO₂ to 2.9 eV for the 1%Bi₂O₃-ZnO/TiO₂ (1BZT) composites, resulting in improved light-harvesting capabilities. Photocatalytic performance studies, particularly methylene blue degradation under visible light, revealed notable improvements for Bi₂O₃-ZnO/TiO₂ systems compared to ZnO/TiO₂ and TiO₂. The 1%Bi₂O₃-ZnO/TiO₂ heterostructure was found as efficient photocatalyst with 98% photodegradation of MB. The maximum rate constant, 0.0234 min^− 1, was observed for 1BZT nanofibers, which was 4.97 and 16.7 times greater than those of ZnO/TiO₂ and TiO₂, respectively. This enhancement highlights the synergistic effect between Zn²⁺ and Bi³⁺, alongside the enhanced visible light absorption by Bi³⁺, which collectively elevated the photocatalytic efficiency. The heterojunction formed among Bi³⁺, Zn²⁺, and Ti⁴⁺ significantly facilitated the separation of photogenerated charge carriers, which is essential for high photocatalytic efficiency. Quenching experiments confirmed the important roles in the photocatalytic degradation of MB were played by ^•OH and ^•O⁻ ₂ rather than the h⁺ radical under sun light. The 1%Bi₂O₃-ZnO/TiO₂ photocatalyst exhibited the highest level of activity and excellent reusability, retaining its photocatalytic performance over multiple cycles.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 4","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143513238","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Unlocking Optimal Performance of PGM-Free CeCuOx Mixed Oxide Catalysts for CO and C3H6 Emission Conversion","authors":"Sheikh Muhammad Farhan,&nbsp;Longwei Cheng,&nbsp;Pan Wang,&nbsp;JianJun Yin,&nbsp;Zhijian Chen","doi":"10.1007/s10562-025-04964-3","DOIUrl":"10.1007/s10562-025-04964-3","url":null,"abstract":"<div><p>A sustainable and cost-effective alternative for environmental applications is the use of PGM-free catalysts, which are crucial for pollutant removal. This research employed the sol-gel method to synthesize stable and effective mesoporous CeCuO_x mixed oxide catalysts to facilitate the oxidation of CO and C₃H₆ emissions at lower temperatures. Additionally, pure CeO₂ and CuO were also synthesized for comparative analysis. Catalytic performance was considerably increased by doping CeO₂ with Cu, whereas pure CuO and CeO₂ showed modest activity. XRD, SEM, BET, XPS, Raman spectroscopy, H₂-TPR, and CO-TPD showed that increasing Ce content produced a consistent pore structure without aggregation. In contrast, higher Cu concentration resulted in bulk CuO production, which led to decreased catalytic performance. In particular, the production of isolated CuO_x species partly covered or clogged pores when the Cu level was above 20 wt%, which reduced the total number of effective sites for O₂ activation. Compared to other mixed and pure oxides, the ideal catalyst, Ce₇Cu₃Ox (T_{90, CO} = 178 °C), showed smaller particle size, higher specific surface area, and a larger lattice oxygen species and oxygen vacancies concentration. Additionally, it showed the best CO and C₃H₆ conversion due to its high Ce³⁺ concentration and interfacial active Cu species ratio. H₂-TPR and CO-TPD analyses demonstrated that Ce-Cu mixed oxides with optimal Ce/Cu ratios, particularly Ce₇Cu₃O_x and Ce₅Cu₅O_x, achieve enhanced reducibility and balanced CO adsorption, which are critical for maximizing catalytic reactivity. The catalytic activity exhibited the following sequence: Ce₇Cu₃O_x &gt; Ce₅Cu₅O_x &gt; Ce₉Cu₁O_x &gt; Ce₃Cu₇O_x &gt; Ce₁Cu₉O_x &gt; CuO &gt; CeO₂. This investigation offers a valuable perspective on the mechanisms of Ce-Cu interaction, which contributes to developing high-performance CeCuOx catalysts that are free of PGMs and operate under realistic reaction conditions.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 4","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143513257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}