Catalysis Letters最新文献

Recyclable Palladium-Catalyzed Carbonylative Cyclization of Trifluoroacetimidoyl Chlorides with Nitro Compounds Towards 2-(Trifluoromethyl)quinazolin-4(3H)-ones 可回收钯催化的三氟乙酰胺酰氯与硝基化合物羰基环化制2-（三氟甲基）喹唑啉-4(3H)-酮

IF 2.3 4区化学

Catalysis Letters Pub Date : 2025-10-04 DOI: 10.1007/s10562-025-05180-9

Jinbiao Wu, Jianan Zhan, Mingzhong Cai

{"title":"Recyclable Palladium-Catalyzed Carbonylative Cyclization of Trifluoroacetimidoyl Chlorides with Nitro Compounds Towards 2-(Trifluoromethyl)quinazolin-4(3H)-ones","authors":"Jinbiao Wu, Jianan Zhan, Mingzhong Cai","doi":"10.1007/s10562-025-05180-9","DOIUrl":"10.1007/s10562-025-05180-9","url":null,"abstract":"<div><p>A new mesoporous SBA-15-anchored Schiff base and phosphine mixed bidentate palladium(II) complex [SBA-15-N, P-PdCl<sub>2</sub>] was prepared via immobilization of 3- aminopropyltriethoxysilane on SBA-15, followed by condensation with 2–(diphenylphosphino)benzaldehyde and then coordination with PdCl<sub>2</sub>. With the use of 5 mol% of SBA15-N, P-PdCl<sub>2</sub> as catalyst, the carbonylative cyclization between trifluoroacetimidoyl chlorides and nitro compounds proceeds smoothly in 1,4-dioxane at 120 °C with Na<sub>2</sub>CO<sub>3</sub> (2 equiv.) as base by using Mo(CO)<sub>6</sub> (2 equiv.) as both a solid CO source and a reductant, yielding a variety of 2-(trifluoromethyl)quinazolin-4(3<i>H</i>)-ones in 68–94% yields. The SBA-15-N, P-PdCl<sub>2</sub> complex can be easily separated by a simple centrifugation process and recycled more than 8 cycles without a remarkable loss of activity. The current protocol not only solves the basic problem of expensive palladium catalyst recovery and reuse, but also prevents palladium contamination in the final product.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div><div><p>A highly efficient heterogeneous palladium-catalyzed carbonylative cyclization of trifluoroacetimidoyl chlorides, nitro compounds and Mo(CO)6 towards 2-(trifluoro- methyl)quinazolin-4(3H)-ones is described.</p></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 11","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210261","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}

引用次数: 0

Coordination-Tuned Cu single-Atom Catalyst for Efficient CO2 Electroreduction to C1 Products 配位调整Cu单原子催化剂用于高效CO2电还原制C1产品

IF 2.3 4区化学

Catalysis Letters Pub Date : 2025-10-03 DOI: 10.1007/s10562-025-05199-y

Hui Li, Jing Zhang, Xindi Cao, Zhonglin Bi, Han Dai, Junfeng Zhao

{"title":"Coordination-Tuned Cu single-Atom Catalyst for Efficient CO2 Electroreduction to C1 Products","authors":"Hui Li, Jing Zhang, Xindi Cao, Zhonglin Bi, Han Dai, Junfeng Zhao","doi":"10.1007/s10562-025-05199-y","DOIUrl":"10.1007/s10562-025-05199-y","url":null,"abstract":"<div><p>Electrochemical reduction of CO<sub>2</sub> to valuable C1 products is a promising strategy for carbon mitigation and renewable energy storage. Copper-based single-atom catalysts have garnered significant attention due to their exceptional catalytic performance for CO<sub>2</sub> reduction reactions. In this study, we used density functional theory to systematically investigate the effect of heteroatom (B, O, S) doping on Cu–N–C SACs. By adjusting the coordination environment of Cu active sites, we aimed to enhance the catalytic efficiency and selectivity for C1 products, such as CO, HCOOH, CH<sub>3</sub>OH, and CH<sub>4</sub>. Our results reveal that doping with heteroatoms significantly modulates the electronic structure of the Cu active sites, thereby influencing CO<sub>2</sub> adsorption, intermediate stabilization, and reaction pathways. The S-doped Cu-N<sub>2</sub>S<sub>2</sub>-1 and Cu-N<sub>2</sub>S<sub>2</sub>-2 catalysts exhibit superior CO selectivity, while B-doped Cu-N<sub>2</sub>B<sub>2</sub>-2 and Cu-N<sub>1</sub>B<sub>3</sub> catalysts demonstrate high HCOOH production efficiency. The Cu-N<sub>2</sub>B<sub>2</sub>-1 catalyst shows optimal activity for multi-electron products (CH<sub>3</sub>OH and CH<sub>4</sub>), while Cu-N<sub>1</sub>B<sub>3</sub> and Cu-N<sub>0</sub>O<sub>4</sub> display superior selectivity for CH<sub>3</sub>OH and CH<sub>4</sub>, respectively. Stability analyses confirm the structural and electrochemical robustness of these catalysts under operating conditions. This work provides critical insights into the coordination engineering of Cu SACs and establishes a rational design strategy for high-performance catalysts in sustainable CO<sub>2</sub> conversion.</p></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 11","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210339","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}

引用次数: 0

One-Pot Multicomponent Synthesis of Chromene Analogues by HQS@CoFe2O4 Nanocatalyst HQS@CoFe2O4纳米催化剂一锅多组分合成铬类似物

IF 2.3 4区化学

Catalysis Letters Pub Date : 2025-10-03 DOI: 10.1007/s10562-025-05184-5

K. S. Patil, S. T. Mane, D. M. Sirsat, D. G. Kanase

{"title":"One-Pot Multicomponent Synthesis of Chromene Analogues by HQS@CoFe2O4 Nanocatalyst","authors":"K. S. Patil, S. T. Mane, D. M. Sirsat, D. G. Kanase","doi":"10.1007/s10562-025-05184-5","DOIUrl":"10.1007/s10562-025-05184-5","url":null,"abstract":"<div><p>A green and efficient method has been developed for the synthesis of chromene analogues via atom-economical heterocyclization. This methodology enables ultrarapid and sustainable synthesis of heterocyclic analogues, without generating byproducts and multiple reuse cycles of the nanocatalyst. This process involves the reaction of different aldehydes, 4-hydroxycoumarin, and malononitrile in water using 8-hydroxyquinoline-5-sulfonic acid@CoFe<sub>2</sub>O<sub>4</sub> (HQS@CoFe<sub>2</sub>O<sub>4</sub>) as a magnetic catalyst under mild reaction conditions (70 °C). The procedure offers several advantages, including operational simplicity, high yields (97%), short reaction times, and no need for laborious purification steps. The catalyst demonstrates excellent activity in aqueous media and its easy preparation and straightforward magnetic separation make it a practical and effective heterogeneous system. Notably, the catalyst can be reused multiple times with minimal loss of performance. The synthesized chromene analogues were characterized by melting point, IR, and ¹H NMR spectroscopy, confirming their successful formation.</p><h3>\u0000 <b>Graphical Abstract</b>\u0000 </h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 11","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210340","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}

引用次数: 0

Enhancing Synergistic Interactions Among Metal Atoms Through S Doping for Efficient Oxygen Evolution Reaction 通过S掺杂增强金属原子间的协同作用，实现高效析氧反应

IF 2.3 4区化学

Catalysis Letters Pub Date : 2025-10-03 DOI: 10.1007/s10562-025-05198-z

Shengjie Jiang, Qi Wang, Gonggang Sun, Xinbao Li

{"title":"Enhancing Synergistic Interactions Among Metal Atoms Through S Doping for Efficient Oxygen Evolution Reaction","authors":"Shengjie Jiang, Qi Wang, Gonggang Sun, Xinbao Li","doi":"10.1007/s10562-025-05198-z","DOIUrl":"10.1007/s10562-025-05198-z","url":null,"abstract":"<div><p>Developing highly active and stable non-precious-metal electrocatalysts for the oxygen evolution reaction (OER) is essential for efficient green hydrogen production. However, monometallic catalysts exhibit poor stability and high overpotentials under high current densities. Therefore, the development of multi-metallic catalysts has become a focus of attention. Herein, we report a NiCoFeS/NF catalyst that exhibits higher OER activity in alkaline solution compare with commercial RuO<sub>2</sub>-based catalysts. The synthesized NiCoFeS/NF catalyst delivers a current density of 100 mA cm<sup>− 2</sup> at a low overpotential of 280 mV and exhibits a Tafel slope of 49 mV dec<sup>− 1</sup>, reflecting its favorable kinetics. Furthermore, the NiCoFeS/NF catalyst exhibited a long-term stability over 120 h, ensuring its potential for practical applications. Detailed characterizations revealed that sulfur incorporation not only creates additional active sites but also induces the self-unfolding of nanoparticles into nanosheets, thereby enlarging the electrochemically active surface area (ECSA).</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 11","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210341","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}

引用次数: 0

Copper Catalysts Supported on Porous Aromatic Frameworks for Hydrogenation of Ethylene Carbonate 多孔芳香骨架负载的铜催化剂用于碳酸乙烯加氢

IF 2.3 4区化学

Catalysis Letters Pub Date : 2025-10-03 DOI: 10.1007/s10562-025-05200-8

Elizaveta Oskina, Daria Makeeva, Leonid Kulikov, Anton Maximov

{"title":"Copper Catalysts Supported on Porous Aromatic Frameworks for Hydrogenation of Ethylene Carbonate","authors":"Elizaveta Oskina, Daria Makeeva, Leonid Kulikov, Anton Maximov","doi":"10.1007/s10562-025-05200-8","DOIUrl":"10.1007/s10562-025-05200-8","url":null,"abstract":"<div><p>Hydrogenation of organic carbonates on heterogeneous catalysts is one of the ways of indirect conversion of carbon dioxide, which is essential for addressing the urgent problem of decarbonization. Cu-based catalysts are the most widely used in hydrogenation, but their properties strongly depend on the characteristics of the heterogeneous carriers used. Although SiO<sub>2</sub>-based catalysts are the most extensively studied, it is of interest to develop catalysts based on new types of carriers such as MOFs, COFs and PAFs. In the current work, a series of copper-based catalysts with different metal contents (2, 5, 10, 30 wt%) based on porous aromatic framework PAF-30 and its amino-functionalized derivative PAF-30-NH<sub>2</sub> were synthesized and investigated in the hydrogenation of ethylene carbonate. The influence of reaction temperature, hydrogen pressure, concentration of ethylene carbonate in its solution in THF, copper content in the catalysts and reduction conditions on the activity of the catalysts was systematically studied. A high activity of 940 mg<sub>EC</sub> g<sub>cat</sub><sup>−1</sup> h<sup>−1</sup> was attained with 30Cu-PAF-30-NH<sub>2</sub> catalyst at 200 °C and 4 MPa H<sub>2</sub> in 4 h.</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 11","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210342","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}

引用次数: 0

Photocatalytic Degradation of Ciprofloxacin Antibiotics Via Cobalt Doped SPINEL Ferrites Nanocomposite: Synthesis, Characterization, and Mechanistic Insights 钴掺杂尖晶石铁氧体纳米复合材料光催化降解环丙沙星抗生素：合成、表征和机理研究

IF 2.3 4区化学

Catalysis Letters Pub Date : 2025-10-03 DOI: 10.1007/s10562-025-05194-3

Fozia Aslam, Taniya Aslam, Fuad M. Alzahrani, Md Nagib Mahfuz Sunny, Muhammad Muntazir Mehdi, Khalid J. Alzahrani, Muhammad Yasar, Anorgul I. Ashirova, Mirjalol Ismoilov Ruziboy Ugli, Yuling Feng

{"title":"Photocatalytic Degradation of Ciprofloxacin Antibiotics Via Cobalt Doped SPINEL Ferrites Nanocomposite: Synthesis, Characterization, and Mechanistic Insights","authors":"Fozia Aslam, Taniya Aslam, Fuad M. Alzahrani, Md Nagib Mahfuz Sunny, Muhammad Muntazir Mehdi, Khalid J. Alzahrani, Muhammad Yasar, Anorgul I. Ashirova, Mirjalol Ismoilov Ruziboy Ugli, Yuling Feng","doi":"10.1007/s10562-025-05194-3","DOIUrl":"10.1007/s10562-025-05194-3","url":null,"abstract":"<div><p>The widespread occurrence of pharmaceutical pollutants, particularly ciprofloxacin, in aquatic environments threatens ecosystem health and promotes bacterial resistance to antibiotics. Conventional wastewater treatments fail to meet the standards (< 0.1 µg/L), while TiO₂ photocatalysts show limited visible-light activity because of their wide band gaps (3.0-3.2 eV). In this study, Co-doped Co<sub>x</sub>Sr<sub>0.7−x</sub>Mn<sub>0.3</sub>Al<sub>0.4</sub>Fe<sub>1.6</sub>O<sub>4</sub> (X = 0,0.2) spinel ferrites were synthesized, and X-ray diffraction confirmed a cubic spinel ferrite structure, with cobalt doping reducing the crystallite size (from 28.371 to 20.488 nm). FTIR spectroscopy revealed the incorporation of Co through the peak shifts. The Co-doped catalyst exhibited enhanced properties: BET surface area increased from 6.63 to 32.14 m²/g, pore volume from 0.86 to 1.29 cm³/g, and optical band gap narrowed from 2.82 to 2.61 eV. Ciprofloxacin degradation improved from 53.65% to 100% in 70 min, with a quantum efficiency of 1.85 × 10⁻⁶ molec/photon and a space-time yield of 9.24 × 10⁻⁸ molec/ph. Kinetic analysis showed first-order behaviour (k₁ = 0.02411 min⁻¹, R² = 0.98864). The catalyst degraded Rhodamine B (82%), Methylene Blue (71.81%), tetracycline (66.82%), and sulfamethoxazole (42%) with hydroxyl radicals as the primary oxidisers, maintaining 91.66% efficiency after five 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 11","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210343","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}

引用次数: 0

Green Valorization of 5-Hydroxymethylfurfural To Biofuel 2, 5-Dimethylfuran Over Fe–Ni Bimetallic Catalysts Supported on Coal Fly Ash 粉煤灰负载铁镍双金属催化剂催化5-羟甲基糠醛制备生物燃料2,5 -二甲基呋喃

IF 2.3 4区化学

Catalysis Letters Pub Date : 2025-09-30 DOI: 10.1007/s10562-025-05167-6

Yilin Sun, Sangni Chen, Weiqi Song, Mengyuan Zou, Zhouhuan Chen, Xianxiang Liu

{"title":"Green Valorization of 5-Hydroxymethylfurfural To Biofuel 2, 5-Dimethylfuran Over Fe–Ni Bimetallic Catalysts Supported on Coal Fly Ash","authors":"Yilin Sun, Sangni Chen, Weiqi Song, Mengyuan Zou, Zhouhuan Chen, Xianxiang Liu","doi":"10.1007/s10562-025-05167-6","DOIUrl":"10.1007/s10562-025-05167-6","url":null,"abstract":"<div><p>Biomass, as a renewable and environmentally friendly energy source, has attracted widespread attention in recent years. Among biomass-derived platform molecules, 5-hydroxymethylfurfural (HMF) is particularly important due to its potential to be converted into a variety of high-value chemicals. The development of green and efficient catalysts is crucial for the selective conversion of HMF. In this study, industrial solid waste coal fly ash (CFA) was utilized as a support to prepare a series of iron–nickel bimetallic catalysts via a simple grinding method for the catalytic hydrogenolysis of HMF to biofuel 2,5-dimethylfuran (DMF), a promising biofuel. The structural and surface properties of the catalysts were characterized by XRD, TG, XPS, and TEM. The effects of Fe–Ni composition, reaction temperature, catalyst dosage, and reaction time on HMF conversion and DMF selectivity were systematically investigated. The results revealed that the optimized catalyst achieved complete conversion of HMF and a DMF selectivity of up to 97.4% under mild conditions. Furthermore, the incorporation of Fe significantly enhanced the hydrogenation selectivity of Ni, demonstrating a strong synergistic effect in the bimetallic system. This work provides a sustainable approach for biomass valorization and highlights the potential of repurposing industrial waste materials for catalytic applications.</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 11","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210570","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}

引用次数: 0

A Ternary Transition Metal Oxide Composite as an Efficient Electrode for Electrocatalytic Ammonia Oxidation 三元过渡金属氧化物复合材料作为电催化氨氧化的高效电极

IF 2.3 4区化学

Catalysis Letters Pub Date : 2025-09-30 DOI: 10.1007/s10562-025-05185-4

Li Xiao, Xiulin Wang, Huichao Yao, Suofu Nie, Sida Wu, Sen Ren, Yuqing Zhang, Ruoyun Dai, Yangyu Li, Xingbo Ge

{"title":"A Ternary Transition Metal Oxide Composite as an Efficient Electrode for Electrocatalytic Ammonia Oxidation","authors":"Li Xiao, Xiulin Wang, Huichao Yao, Suofu Nie, Sida Wu, Sen Ren, Yuqing Zhang, Ruoyun Dai, Yangyu Li, Xingbo Ge","doi":"10.1007/s10562-025-05185-4","DOIUrl":"10.1007/s10562-025-05185-4","url":null,"abstract":"<div><p>Electrochemical ammonia treatment has garnered significant interest due to its operational simplicity, environmental compatibility, and adaptability to diverse conditions. A key challenge remains the development of robust, highly active, and cost-effective anodes for ammonia oxidation. Herein, we report a ternary metal oxides electrode for ammonia oxidation reaction, fabricated by integrated electrochemical deposition and thermal treatment. The resulting NiCoCu oxides electrode achieves a net current density of 75.2 mA/cm<sup>2</sup> at 1.62 V vs. RHE for ammonia oxidation. The electrolytic cell exhibits a Faradaic efficiency of ~ 24% and enables ~ 93% ammonia removal after 24 h of operation. Density functional theory (DFT) analysis reveals that incorporating Ni and Co modulates the catalyst’s electronic structure, inducing surface charge redistribution and optimizing adsorption strength of reaction intermediates. This work establishes a versatile strategy for fabricating NiCoCu oxides electrode with high efficacy in electrocatalytic ammonia oxidation. </p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div><div><p>This study provides a ternary metal oxides electrode for ammonia oxidation reaction, fabricated by integrated electrochemical deposition and thermal treatment.</p></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 11","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210565","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}

引用次数: 0

Synergistic Enhancement of Au-Fe/TS-1 Bimetallic Catalysts for Propylene Gas-Phase Epoxidation Au-Fe/TS-1双金属催化剂在丙烯气相环氧化反应中的增效作用

IF 2.3 4区化学

Catalysis Letters Pub Date : 2025-09-30 DOI: 10.1007/s10562-025-05191-6

Longzhao Zhang, Xiangyu Huang, Weihua Ma

{"title":"Synergistic Enhancement of Au-Fe/TS-1 Bimetallic Catalysts for Propylene Gas-Phase Epoxidation","authors":"Longzhao Zhang, Xiangyu Huang, Weihua Ma","doi":"10.1007/s10562-025-05191-6","DOIUrl":"10.1007/s10562-025-05191-6","url":null,"abstract":"<div><p>The introduction of a second metal into Au/TS-1 can increase the number of active sites and control the size of metal particles to enhance catalytic activity. In this study Au-Fe bimetallic catalyst Au-Fe/TS-1 was prepared by the deposition-precipitation (DP) method, the structure and morphology of the catalyst were characterized by XRD, BET, and HRTEM. The effects of Fe source (such as Fe(NO<sub>3</sub>)<sub>3</sub>, Fe<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub>, NaFeEDTA) and Fe/Au ratio on propylene epoxidation performance were systematically investigated. The facile hydrolysis of Fe<sup>3+</sup> and the absence of ligand coordination resulted in substantial coating of the TS-1 surface with Fe(OH)<sub>3</sub> which severely impaired propylene oxide (PO) selectivity and promoted the peroxidation reaction. However, using NaFeEDTA as Fe source can significantly inhibit excessive Fe deposition and the Au nanoparticles of Au-Fe/TS-1 is around 2 nm (smaller than the 3 nm in Au/TS-1). The synergistic effect of Au-Fe enhances the epoxidation activity of the catalyst, thereby increasing the rate of PO formation. Specifically, the optimal catalyst, Au-Fe<sub>0.2</sub>(E)/TS-1(using NaFeEDTA as Fe source), achieved a maximum PO formation rate of 146 g<sub>PO</sub>·h<sup>−1</sup>·kg<sub>Cat</sub><sup>−1</sup> at 200 °C (significantly higher than 96 g<sub>PO</sub>·h<sup>−1</sup>·kg<sub>Cat</sub><sup>−1</sup> of Au/TS-1), with PO selectivity exceeding 90%. These findings provide valuable insights for the rational design and development of more efficient Au-M bimetallic 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 11","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210571","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}

引用次数: 0

The Effect of the Ln Type on the Structure and Catalytic Properties of Ln Chromites Ln类型对Ln铬铁矿结构及催化性能的影响

IF 2.3 4区化学

Catalysis Letters Pub Date : 2025-09-27 DOI: 10.1007/s10562-025-05190-7

V. V. Popov, E. B. Markova, Y. V. Zubavichus, A. P. Menushenkov, A. A. Yastrebtsev, A. A. Ivanov, B. R. Gaynanov, M. M. Berdnikova, A. A. Pisarev, A. V. Kurochkin, E. S. Kulikova, N. A. Kolyshkin, E. V. Khramov

{"title":"The Effect of the Ln Type on the Structure and Catalytic Properties of Ln Chromites","authors":"V. V. Popov, E. B. Markova, Y. V. Zubavichus, A. P. Menushenkov, A. A. Yastrebtsev, A. A. Ivanov, B. R. Gaynanov, M. M. Berdnikova, A. A. Pisarev, A. V. Kurochkin, E. S. Kulikova, N. A. Kolyshkin, E. V. Khramov","doi":"10.1007/s10562-025-05190-7","DOIUrl":"10.1007/s10562-025-05190-7","url":null,"abstract":"<p>The influence of the lanthanide cation type on the structure and catalytic properties of both individual and high-entropy (HE) <i>Ln</i> chromites (<i>Ln</i> = La – Yb) was studied. <i>Ln</i> chromites crystallized in a distorted perovskite structure with the orthorhombic symmetry (sp. gr. <i>Pbnm</i>). The distortion of the perovskite structure increases with a decrease in <span>({Ln}^{3+})</span> cation radius. In HE <i>Ln</i> chromites <span>({Ln}^{3+})</span> cations retain certain independence in behavior despite occupying the same crystallographic site in the structure. The use of <i>Ln</i> chromites significantly reduces the conversion onset temperature and increases the percentage of its conversion. It was found that the ionic radius and electron structure of the <span>({Ln}^{3+})</span> cation determine the acidity of the active sites and the differential heat of adsorption at zero surface coverage, which are the main factors determining the adsorption capacity and pathways of the propane conversion process. The use of light <i>Ln</i> chromites with the maximum concentration of Lewis acid sites promotes the propane dehydrogenation reaction with the formation of propylene. A decrease in the number of Lewis acid sites and an increase in the number of Brønsted acid sites as the 4<i>f</i> shell of the <span>({Ln}^{3+})</span> cations is filled promotes the propane cracking reaction with the formation of a mixture of methane and ethylene. A characteristic feature of the catalytic behavior of HE <i>Ln</i> chromites is the formation of butadiene in the conversion products, which is attributed to the increased acidity of the active sites and the differential heat of adsorption at zero surface coverage.</p>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 11","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145170677","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}

引用次数: 0