Catalysis Letters最新文献

{"title":"Ternary Z-Scheme Ag/TiO₂/g-C₃N₄ Nanocomposite for Enhanced Visible-Light Photocatalytic Reduction of p-Nitrophenol","authors":"Hamza El-Hosainy,&nbsp;Alaa A. Alhashash,&nbsp;Abd El-Motaleb M. Ramadan,&nbsp;Ezz-Elregal M. Ezz-Elregal,&nbsp;Rafat Tahway,&nbsp;Maged El-Kemary","doi":"10.1007/s10562-025-05128-z","DOIUrl":"10.1007/s10562-025-05128-z","url":null,"abstract":"<div><p>In this study, a novel biphasic anatase/brookite TiO₂ was successfully deposited onto g-C₃N₄ via an impregnation method, followed by the photodeposition of Ag nanoparticles to construct a ternary Ag/TiO₂/g-C₃N₄ nanocomposite. Detailed physicochemical characterizations confirmed the successful immobilization of Ag nanoparticles on the TiO₂/g-C₃N₄ surface, contributing to a significantly enhanced surface area, broadened visible light absorption, and improved charge carrier separation. The photocatalytic performance of the resulting nanocomposites was evaluated through the reduction of p-nitrophenol (PNP) to p-aminophenol (PAP), revealing a remarkable enhancement in activity with increasing Ag content. Notably, the 2% Ag/TiO₂/g-C₃N₄ nanocomposite achieved complete (98%) conversion of PNP to PAP within just 6.5 min under visible light irradiation. This performance was approximately three times higher than that of 0.5% Ag/TiO₂/g-C₃N₄, twice that of 2% Ag/TiO₂ (commercial)/g-C₃N₄, and significantly superior to bare TiO₂/g-C₃N₄. The outstanding photocatalytic efficiency of the 2% Ag/TiO₂/g-C₃N₄ system is attributed to its superior light-harvesting ability and efficient charge separation via a Z-scheme mechanism. These findings present a promising and scalable strategy for engineering advanced ternary nanocomposite photocatalysts with enhanced environmental remediation capabilities.</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 10","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145090629","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 NiS/Ni3S4/Ni3S2/NF Heterostructure as High-Efficiency Electrocatalyst for Oxygen Evolution Reaction","authors":"Tuojie Yang,&nbsp;Lei Yang,&nbsp;Yiming Xie,&nbsp;Chang Dai,&nbsp;Zihang Li,&nbsp;Sifan Zhang,&nbsp;Ke Wang,&nbsp;Fulong Li,&nbsp;Lin Jiang,&nbsp;Yinghui Sun","doi":"10.1007/s10562-025-05166-7","DOIUrl":"10.1007/s10562-025-05166-7","url":null,"abstract":"<div><p>The design of cost-effective electrocatalysts with excellent performance is imperative for water splitting. Herein, novel heterostructured NiS/Ni₃S₄/Ni₃S₂/NF electrocatalysts were successfully prepared by hydrothermal synthesis in a one-pot process, exhibiting efficient activity in the oxygen evolution reaction (OER) with a low overpotential of 237 mV at 10 mA cm^-2 and a corresponding Tafel slope of 30.44 mV dec^-1 in 1.0 M KOH. The overall electrocatalytic water splitting cell voltage was only 1.51 V at 10 mA cm^-2 in KOH when using NiS/Ni₃S₄/Ni₃S₂/NF as the anode and platinum on carbon (Pt/C) as the cathode. Density functional simulations further revealed that the exceptional activity primarily stems from the coupling interactions between Ni₃S₂(110)/Ni₃S₄(100) interfaces, which not only optimizes the adsorption free energy of OER intermediates but also enhances catalytic performance. This synthetic strategy provides an avenue for expanding other cost-effective multiphase metal heterostructures.</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 10","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145073845","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 Dehydrogenation of 2-Propanol via Surface Synergism of CuO@ Nanostructured Ceria Derived from Modified Ce-UiO-66","authors":"Ahmed Abdo Hassan,&nbsp;Mostafa Farrag,&nbsp;Rabei M. Gabr,&nbsp;Mohamed I. Said","doi":"10.1007/s10562-025-05161-y","DOIUrl":"10.1007/s10562-025-05161-y","url":null,"abstract":"<div><p>Dehydrogenation of alcohols to ketones and hydrogen offers a green and sustainable procedure for H₂ production as a best alternative for clean fuel. Researchers are challenged today to develop catalysts that possess remarkable conversion as well as high selectivity towards alcohol dehydration. CuO modified, structured cerias were successfully synthesized by carbonization of Ce-UiO-66 at 400–600 °C. The synthesized materials were characterized by XRD, XPS, TGA, TEM, EDX and FTIR spectroscopy. Surface texture also was investigated through N₂ adsorption at (77 ^°K). The catalysts were posted towards the dehydrogenation of 2-propanol in the gas phase. The catalytic performance could easily be tested by varying the Cu/Ce ratio, calcination temperature, and catalyst loading. The optimized CuO/CeO₂ ratio exhibited &gt; 99% conversion and 100% selectivity for both H₂ and acetone at 225 °C. The characterization results showed that the synergetic effect between Cu²⁺ and ceria existed and thus strengthening H₂ production, meanwhile following acetone generation. Kinetic analysis was studied isothermally at different temperatures which reveals that the dehydrogenation of 2-propanol behaves as first-order kinetics. The data was extended to determine the rate constant and the apparent activation energy (E_a), which was found to be 19.48 kJ/mole. We proceeded further to compute ∆H, ∆S, and ∆G values. The values that confirm the thermodynamic spontaneity of the dehydrogenation pathway. The surface synergisms caused by the CuO modification, which increase the ratio of Ce(III) to Ce(IV) atoms and cause the creation of Cu(I) and Cu(II) sites, are responsible for the catalytic performance of the produced catalysts. Consequently, the CuO modification promotes the dehydrogenation pathway which needs these basic sites. Therefore, it is reasonable to propose that the most likely cause of the observed CuO enhancement of 2-propanol dehydrogenation is the improved production of Ce(III)/Ce(IV) and Cu(I)/Cu(II) redox couples. A Langmuir Hinshelwood mechanism was suggested, which included adsorbed IPA, H₂, acetone, and isopropoxide into the site balance and supposed that the removal of the initial atom was the step that determined the reaction rate.</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 10","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145073916","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":"Copper Catalyzed Selective Monoarylation of Anilines by a New Reusable Catalyst Supported on Magnetic Mesoporous Silica","authors":"Mahsa Sotoude,&nbsp;Yagoub Mansoori,&nbsp;Fatemeh Ghahramani,&nbsp;Abolfazl Bezaatpour","doi":"10.1007/s10562-025-05173-8","DOIUrl":"10.1007/s10562-025-05173-8","url":null,"abstract":"<div><p>This study presents the anchoring of a Cu-complex onto a magnetite/SBA-15 composite material. The synthesis was achieved via sequential functionalization of magnetic mesoporous silica, first with (3-aminopropyl) triethoxysilane (APTES), followed by trichlorotriazine and tetraethylenepentamine (TEPA), resulting in the formation of Fe₃O₄@SBA-TEPA. Subsequent coordination of the grafted polyamine ligand with CuI in acetonitrile yielded the Cu-complex, Fe₃O₄@SBA-TEPA-Cu. Comprehensive characterization of the supported complex was performed using Fourier-transform infrared spectroscopy (FT-IR), and thermogravimetric analysis (TGA). The anchored Cu-catalyst displayed remarkable efficiency in catalyzing C-N bond formation via the Ullmann-type <i>N</i>-arylation of haloarenes and anilines under optimized reaction conditions, selectively producing the mono <i>N</i>-arylation product with high fidelity. The catalyst demonstrated outstanding recyclability, showing minimal deactivation over seven consecutive reaction cycles, highlighting its robustness and stability.</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 10","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145073641","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":"Investigating Shaped Effects of Ag/Al2O3 for Ethylene Epoxidation Using CFD Simulation Method","authors":"Lijun Yang,&nbsp;Xinlong Liu,&nbsp;Huanwen Zhou,&nbsp;Yue Yao,&nbsp;Xiaoyuan Liao","doi":"10.1007/s10562-025-05172-9","DOIUrl":"10.1007/s10562-025-05172-9","url":null,"abstract":"<div><p>In work, the shaped alumina as supports of Ag/α-Al₂O₃ for ethylene oxidation, has been fully been investigated by CFD simulation method. It was found that three kinds of shaped supports, i.e., 7-Hole cylinder, Raschig ring and Hollow fourlobe α-Al₂O₃, have significant influence on the catalytic activity of ethylene epoxidation. The shaped effects mainly reflected in two aspects: (1) significantly affect the fluid flow characteristics and pressure drop distribution; (2) determines the effective mass transfer area and diffusion path, which in turn affects these reactants concentration distribution and conversion efficiency. The Hollow fourlobe packing structure demonstrated the best overall performance, has the activity and selectivity have the order of Hollow fourlobe &gt; 7-Hole cylinder &gt; Raschig ring, Hollow fourlobe Ag/α-Al₂O₃ was with the highest ethylene conversion 8%, and ethylene oxide selectivity 86%. This work will provide a reference for designing highly efficient industrial catalysts.</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 10","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145073578","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":"Imidazolium-Based Deep Eutectic Solvents Catalyzed Cycloaddition Reaction of Epoxide with CO2 in Simulated Flue Gas","authors":"Jie Zhou,&nbsp;Wen-Wang Yu,&nbsp;Xiang-Guang Meng,&nbsp;Wen Li,&nbsp;Dan-Dan Chu","doi":"10.1007/s10562-025-05174-7","DOIUrl":"10.1007/s10562-025-05174-7","url":null,"abstract":"<div><p>The development of catalytic systems capable of in situ capturing carbon dioxide (CO₂) from flue gas under ambient pressure and subsequently converting it into high-value chemicals holds significant practical importance for reducing atmospheric CO₂ levels and advancing the chemical industry. In this study, deep eutectic solvents (DESs) composed of an imidazolium salt and 3-aminobenzyl alcohol were synthesized and employed to catalyze the cycloaddition of CO₂ from simulated flue gas (15% CO₂ + 85% N₂) with epoxides. This catalytic system exhibited excellent catalytic activity, the yield of cyclic carbonate reached up to 94.3% upon reacting under simulated flue gas conditions at 55 °C and 1 atm for 24 h. The effects of temperature, reaction time and catalyst dosage on catalytic efficiency were investigated. The scope of various epoxides was also explored. Furthermore, the catalytic system is readily recyclable, maintaining nearly consistent catalytic activity over five cycles. The catalytic mechanism was clarified via FT-IR and NMR spectroscopic analyses, and a plausible cycloaddition reaction pathway was proposed.</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 10","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145073642","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":"Pd-Cu@MIL-101 Bimetallic Catalyst Enhances the Performance for CO Esterification to Dimethyl Carbonate","authors":"Yi-Ding Li,&nbsp;Lian-He Zhao,&nbsp;Yu-Ping Xu,&nbsp;Wen-Qiang Zou,&nbsp;Jing Sun,&nbsp;Zhong-Ning Xu,&nbsp;Guo-Cong Guo","doi":"10.1007/s10562-025-05176-5","DOIUrl":"10.1007/s10562-025-05176-5","url":null,"abstract":"<div><p>CO esterification to dimethyl carbonate (DMC) offers a promising alternative synthesis route. Contrary to the conventional view that Pd(II) species serve as the active centers, Pd(0) confined in metal–organic frameworks (MOFs) catalyst was developed, which reversed product selectivity and enabled highly selective DMC formation. Extending beyond monometallic systems, we further investigated Pd–Cu@MOFs bimetallic catalysts, revealing that the Cu fraction plays a key role in modulating catalytic activity. A series of 2Pd-xCu@MIL-101 (x = 2, 4, 6) bimetallic catalysts by loading Pd-Cu nanoparticles (NPs) into MIL-101 were synthesized. Under identical reaction conditions, all 2Pd-xCu@MIL-101 catalysts outperformed the 2Pd@MIL-101 catalyst. The 2Pd–4Cu@MIL-101 catalyst exhibited the highest CO conversion activity (60%), markedly surpassing that of the monometallic 2Pd@MIL-101 catalyst (38%). The experimental results demonstrate that the introduction of Cu NPs decreases the particle size of Pd NPs and facilitates their incorporation into the mesopores of MIL-101. According to the characterization results of X-ray photoelectron spectra (XPS) and in situ diffuse reflectance infrared Fourier-transform spectroscopy (DRIFTS), partial electron transfer may occur between Pd NPs and the Cr-oxo sites of MIL-101 as well as the incorporated Cu species, thereby facilitating CO activation and enhancing catalytic activity. This work provides valuable insights for the development of high-performance catalysts for CO esterification to DMC.</p><h3>Graphical Abstract</h3><p>The 2Pd–4Cu@MIL-101 catalyst delivers superior CO esterification activity. Cu incorporation reduces Pd size, confines Pd within MIL-101 pores, and enables electron transfer with Cu and Cr–oxo sites, thereby promoting CO activation and enhancing catalytic performance</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 10","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145073640","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":"Construction and Performance Assessment of an Enzymatic Reactor for Xylulose Synthesis from Hemicellulose","authors":"Zhongliang Su,&nbsp;Shenghu Hao,&nbsp;Yue Ji,&nbsp;Jiantong Fan,&nbsp;Qiuyue Zhang,&nbsp;Yanju Lu,&nbsp;Xiao Liu","doi":"10.1007/s10562-025-05164-9","DOIUrl":"10.1007/s10562-025-05164-9","url":null,"abstract":"<div><p>Xylulose has broad application prospects in fields such as biomanufacturing, bioenergy, pharmaceuticals, and materials. Enzyme-catalyzed synthesis of xylulose from hemicellulose faces challenges such as enzyme deactivation, low reusability, and high industrial costs. To address these issues, our study employed large-pore resin Amberlyst-15(A-15) as a carrier to immobilize both xylanase and xylose isomerase enzymes. The method involved amino-functionalization of the resin using a Macroporous Ion Exchange Resins A-15’s catalytic properties towards hemicellulose for xylose. The immobilization of xylanase and xylose isomerase was achieved through adsorption-crosslinking, successfully combining organic and enzymatic catalysis. By optimizing the enzyme-catalyzed conditions and immobilization methods, stable and active immobilized enzymes were prepared, with investigations into the effects of crosslinkers, crosslinker concentrations, and crosslinking times, leading to the identification of optimal production conditions. The reaction was conducted at 50 °C in a pH 5.5 buffer system for 12 h, the immobilized dual-enzyme prepared by the adsorption-crosslinking method achieved a hemicellulose conversion rate of 56.60%, significantly higher than that of free enzymes. The immobilized enzyme exhibited higher relative activity than the free enzyme at 80 °C and maintained significantly higher relative activity after 15 days of storage.</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 10","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145073643","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":"Effects of Cerium Oxide Incorporation and Zeolite Cationic Form on ZSM-5 Catalysts for Glycerol Dehydration","authors":"Billy Joy Vargas,&nbsp;Caroline Pereira Roldão,&nbsp;Rui dos Santos Ferreira Filho,&nbsp;Juliana Oliveira Fernandes,&nbsp;Edilene Deise da Silva Ferracine,&nbsp;Cezar Augusto da Rosa,&nbsp;Vanessa Bongalhardo Mortola","doi":"10.1007/s10562-025-05169-4","DOIUrl":"10.1007/s10562-025-05169-4","url":null,"abstract":"<div><p>NaZSM-5, HZSM-5, and Ce/HZSM-5 zeolites with a Si/Al ratio of 25 were synthesized via a hydrothermal method developed by our research group, which enables the formation of hierarchical ZSM-5 structures with micro and mesoporosity. These materials were evaluated as catalysts for the glycerol dehydration reaction. The incorporation of cerium oxide into HZSM-5 introduced redox properties that enhanced catalyst stability under oxygen-deficient conditions. When air was co-fed, the oxidative removal of carbonaceous deposits promoted sustained catalytic activity, with Ce/HZSM-5 maintaining consistent performance under both oxidizing and non-oxidizing environments. HZSM-5 also demonstrated stable activity in the presence of oxygen, benefiting from surface regeneration. In contrast, NaZSM-5 exhibited the lowest selectivity, producing a broader range of by-products, a behavior attributed to its lower surface area, limited mesoporosity, and reduced concentration of strong acid sites. These findings highlight the critical role of hierarchical structure, acidity, and redox functionality in enhancing the activity and selectivity of zeolite-based catalysts for acrolein production.</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 10","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145037158","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":"An Efficient and Selective Synthesis of Chalcones via Claisen-Schmidt Condensation Reaction Catalyzed by CuO@rGO Nano Catalyst","authors":"Dipak B. Bawiskar,&nbsp;C. B. Sherin Mol,&nbsp;Allwin Sudhakaran,&nbsp;Venkat V. Narayan,&nbsp;Nitin K. Chaudhari,&nbsp;Balasaheb L. Nikam,&nbsp;Arvind H. Jadhav","doi":"10.1007/s10562-025-05158-7","DOIUrl":"10.1007/s10562-025-05158-7","url":null,"abstract":"<div><p>The formation of carbon-carbon bonds is a fundamental approach in organic synthesis for deriving complex molecular architectures. The Claisen-Schmidt condensation is one of the most essential and efficient broad-spectrum reactions. The synthesis of α,β-unsaturated carbonyl compounds, particularly chalcones, by reductive addition relies heavily on this method. Herein we reported a highly efficient and selective method for synthesizing chalcones through the Claisen–Schmidt condensation reaction using a CuO@rGO (copper oxide supported on reduced graphene oxide) nano-catalyst. The CuO@rGO catalyst was synthesized via a solution combustion method and thoroughly characterized to assess its structural, morphological, and surface properties. The catalyst exhibited fascinating morphological characteristics and enhanced catalytic performance due to the presence of CuO nanoparticles supported on the reduced graphene oxide matrix. Under mild and environmentally friendly conditions, CuO@rGO significantly improved the reaction rate and yielded chalcones with excellent selectivity and yields reaching up to 96%. Systematic optimization of key reaction parameters, including reaction time, temperature, solvent, and catalyst loading, confirmed the robustness and versatility of the prepared catalyst across a range of substituted substrates, converting them into the desired product. Furthermore, mechanistic insights revealed that the active sites of Cu²⁺ supported on rGO promote an effective path for the formation of the desired product. Reusability tests confirmed the catalyst retained high activity over multiple cycles with negligible performance loss. Further analysis of the reused catalyst also showed no alteration in its physicochemical characteristics. This study highlights CuO@rGO as a promising and sustainable heterogeneous catalyst for the synthesis of α,β-unsaturated carbonyl compounds.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div><p>A highly efficient CuO@rGO nano-catalyst was developed for the selective synthesis of chalcones via Claisen-Schmidt condensation. The catalyst demonstrated excellent activity under mild conditions, achieving up to 96% yield with high selectivity. Its reusability and green synthesis approach make it a promising candidate for sustainable organic transformations.</p></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 10","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145037140","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}