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BINAP-Functionalized 2D Metal-Organic Frameworks for Heterogeneous Rh Catalysts 非均相Rh催化剂的binap功能化二维金属有机骨架
IF 2.5 4区 化学
Catalysis Letters Pub Date : 2026-09-23 DOI: 10.1007/s10562-026-05528-9
Xiao Feng, Chengzhong Huang, Baogang Yang, Yanling Han
{"title":"BINAP-Functionalized 2D Metal-Organic Frameworks for Heterogeneous Rh Catalysts","authors":"Xiao Feng,&nbsp;Chengzhong Huang,&nbsp;Baogang Yang,&nbsp;Yanling Han","doi":"10.1007/s10562-026-05528-9","DOIUrl":"10.1007/s10562-026-05528-9","url":null,"abstract":"<div><p>Two-dimensional metal organic frameworks (2D MOFs), characterized by their atomic-level thickness, ultrahigh specific surface area, and highly exposed active sites, offer an ideal platform for constructing advanced heterogeneous catalysts. Herein, chiral BINAP-derived ligands were successfully immobilized within a 2D MOF scaffold, followed by metallization with rhodium (Rh) active species to construct a well-defined heterogeneous asymmetric catalyst. The obtained Zr-BTB-<b>L</b>-Rh retained the intact hierarchical porous structure with atomically dispersed Rh active species, providing an excellent “quasi-homogeneous” environment for efficient reactant transport. In the asymmetric Hayashi-Miyaura addition of arylboronic acids to 2-cyclohexen-1-one, the catalyst demonstrated exceptional performance with over 99% yield and over 99% enantioselectivity (ee). Remarkably, it enabled a turnover number (TON) up to 99 times that of its homogeneous counterpart at low catalyst loading. Moreover, the catalyst could be easily recycled and maintains stable activity and enantioselectivity over five consecutive runs.</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":"156 10","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149034571","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
Engineering of Porous Polyamide-Supported Deep Eutectic Solvent as a Metal-Free Heterogeneous Catalyst for the Synthesis of 3,4-Dihydropyrimidinones and 5-Substituted-1H-Tetrazoles 多孔聚酰胺负载深度共晶溶剂合成3,4-二氢嘧啶和5-取代1h -四唑的非金属非均相催化剂工程研究
IF 2.5 4区 化学
Catalysis Letters Pub Date : 2026-09-23 DOI: 10.1007/s10562-026-05529-8
Fatemeh Sharifirad, Mohammad Mehdi Khodaei
{"title":"Engineering of Porous Polyamide-Supported Deep Eutectic Solvent as a Metal-Free Heterogeneous Catalyst for the Synthesis of 3,4-Dihydropyrimidinones and 5-Substituted-1H-Tetrazoles","authors":"Fatemeh Sharifirad,&nbsp;Mohammad Mehdi Khodaei","doi":"10.1007/s10562-026-05529-8","DOIUrl":"10.1007/s10562-026-05529-8","url":null,"abstract":"<div><p>Deep eutectic solvents (DESs) have emerged as environmentally friendly and tunable green alternatives to traditional ionic liquids and organic solvents, offering advantages such as low toxicity, thermal stability, and negligible vapor pressure. However, challenges related to their separation and reuse limit their practical application in catalysis. Immobilizing DESs on solid substrates, particularly porous organic polymers (POPs), addresses these limitations by enhancing catalyst recovery, stability, and reusability. POPs, especially those based on triazine-containing polyamides, provide a robust, chemically stable, and highly porous framework that facilitates effective mass transfer and substrate activation through Lewis basic sites. In this study, the synthesis of a novel metal-free catalyst, ChCl@TPA, was achieved by in situ formation of a DES via hydrogen bonding between choline chloride (ChCl) and amide groups on the POP surface. This immobilized DES catalyst exhibits bifunctional catalytic activity arising from the synergistic effect between the hydrogen bond network and triazine moieties (as basic sites), enabling efficient synthesis of Biginelli and tetrazole derivatives under mild and green conditions. The catalyst demonstrates excellent recyclability and structural integrity over multiple cycles, highlighting the potential of DES immobilization on POP supports for sustainable and multifunctional catalysis aligned with green chemistry principles.</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":"156 10","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149034569","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
Flash Joule Heating–Driven Fabrication of Defect-Rich Catalysts Derived from Spent Li1.27Mn1.73O4 Batteries for Low-Temperature VOCs Oxidation 闪现焦耳加热制备Li1.27Mn1.73O4废电池富缺陷催化剂用于低温氧化VOCs
IF 2.5 4区 化学
Catalysis Letters Pub Date : 2026-09-16 DOI: 10.1007/s10562-026-05527-w
Xuan Wang, Yu Zheng, Hong Yu Guo, Xin Hui Duan, Cairong Gong, Gang Xue
{"title":"Flash Joule Heating–Driven Fabrication of Defect-Rich Catalysts Derived from Spent Li1.27Mn1.73O4 Batteries for Low-Temperature VOCs Oxidation","authors":"Xuan Wang,&nbsp;Yu Zheng,&nbsp;Hong Yu Guo,&nbsp;Xin Hui Duan,&nbsp;Cairong Gong,&nbsp;Gang Xue","doi":"10.1007/s10562-026-05527-w","DOIUrl":"10.1007/s10562-026-05527-w","url":null,"abstract":"<div><p>Efficient catalytic elimination of volatile organic compounds (VOCs) at low temperatures remains a major challenge. Herein, spent lithium-ion battery (SLIB) cathode materials were utilized as precursors to prepare highly active FMn-aA catalysts for benzene oxidation through flash Joule heating (FJH). Compared with the conventional synthesis route using metal salts as precursors and muffle furnace (MF) heating, the FJH process, together with lithium-ion removal, generated more oxygen vacancies and active oxygen species, resulting in enhanced low-temperature reducibility and superior catalytic activity. The optimized FMn-25 A catalyst achieved over 90% benzene conversion at only 208 °C. In-situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) revealed that the abundant oxygen vacancies promoted the generation of active oxygen species, thereby accelerating the oxidation of benzene and its reaction intermediates. This work provides a sustainable strategy for converting spent lithium-ion batteries into high-performance VOC oxidation catalysts, offering a promising approach for green industrial VOC abatement.</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":"156 10","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148986573","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
Efficient Trimetallic Co–Ni–Mo Nanoparticles Anchored on Carbon Quantum Dots for Efficient Hydrogen Generation via Sodium Borohydride Hydrolysis 锚定在碳量子点上的高效三金属Co-Ni-Mo纳米颗粒通过硼氢化钠水解高效产氢
IF 2.5 4区 化学
Catalysis Letters Pub Date : 2026-09-16 DOI: 10.1007/s10562-026-05491-5
Ahmed M. Abd-elaal, Ayman Yousef, Mohamed M. Abdelsalam, I. G. Rashed, M. M. El-Halwany
{"title":"Efficient Trimetallic Co–Ni–Mo Nanoparticles Anchored on Carbon Quantum Dots for Efficient Hydrogen Generation via Sodium Borohydride Hydrolysis","authors":"Ahmed M. Abd-elaal,&nbsp;Ayman Yousef,&nbsp;Mohamed M. Abdelsalam,&nbsp;I. G. Rashed,&nbsp;M. M. El-Halwany","doi":"10.1007/s10562-026-05491-5","DOIUrl":"10.1007/s10562-026-05491-5","url":null,"abstract":"<div><p>A highly efficient trimetallic Co–Ni–Mo nanocatalyst supported on N-doped carbon quantum dots (Co–Ni–Mo@CQDs) was successfully synthesized via a hydrothermal-assisted chemical reduction strategy for H<sub>2</sub> generation through sodium borohydride (NaBH<sub>4</sub>) hydrolysis. Systematic composition optimization demonstrated that Co<sub>70</sub>Ni<sub>25</sub>Mo<sub>5</sub>@CQDs exhibited the highest catalytic activity among the investigated mono-, bi-, and trimetallic systems. Structural characterization by XRD, SEM, TEM, and EDX confirmed the successful formation of ultrasmall metallic nanoparticles with an average particle size of 6.12 ± 1.01 nm uniformly dispersed on the CQDs matrix without detectable phase segregation. The optimized catalyst achieved rapid H<sub>2</sub> evolution, reaching complete H<sub>2</sub> release (162 mL) within 15 min at a catalyst concentration of 100 mg L<sup>−1</sup>. Kinetic investigations revealed an approximately first-order dependence on catalyst concentration (reaction order = 1.03) and a fractional reaction order with respect to NaBH<sub>4</sub> concentration (0.31), indicating a surface-controlled hydrolysis mechanism with rapid BH<sub>4</sub><sup>−</sup> saturation on the catalyst surface. The catalyst exhibited a low apparent activation energy of 9.04 ± 0.87 kJ mol<sup>−1</sup>, demonstrating highly favorable hydrolysis kinetics. Moreover, the optimized Co<sub>70</sub>Ni<sub>25</sub>Mo<sub>5</sub>@CQDs catalyst exhibited a hydrogen generation rate (HGR) of 7,000 mL H<sub>2</sub> gcat<sup>−1</sup> min<sup>−1</sup>. The remarkable catalytic performance is attributed to the synergistic interaction among Co, Ni, and Mo species together with the excellent dispersion and electron-transfer properties of the CQDs support. Furthermore, the catalyst maintained acceptable catalytic stability over 6 consecutive hydrolysis cycles, highlighting its potential as a low-cost, efficient alternative to noble-metal catalysts for on-demand H<sub>2</sub> 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":"156 10","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148986546","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
Cu-Loaded Catalysts for Efficient Hydrogenation of Furfural to Furfuryl Alcohol: Modulation of Hydrogenation Performance by Introducing Carbon Layer 负载cu催化剂的糠醛高效加氢制糠醇:引入碳层对加氢性能的调节
IF 2.5 4区 化学
Catalysis Letters Pub Date : 2026-09-16 DOI: 10.1007/s10562-026-05493-3
Qihang Ye, Zhaoping Zhong, Yuxuan Yang, Wei Wang, You Jia, Qi Xiong, Huanqi Chen, Xiang Zheng
{"title":"Cu-Loaded Catalysts for Efficient Hydrogenation of Furfural to Furfuryl Alcohol: Modulation of Hydrogenation Performance by Introducing Carbon Layer","authors":"Qihang Ye,&nbsp;Zhaoping Zhong,&nbsp;Yuxuan Yang,&nbsp;Wei Wang,&nbsp;You Jia,&nbsp;Qi Xiong,&nbsp;Huanqi Chen,&nbsp;Xiang Zheng","doi":"10.1007/s10562-026-05493-3","DOIUrl":"10.1007/s10562-026-05493-3","url":null,"abstract":"<div><p>Furfural, a key biomass-derived platform chemical, requires efficient hydrogenation for economic and research benefits. Herein, we propose a carbon-encapsulated catalyst with optimized active sites (using carbon-containing organics) for its highly selective hydrogenation. Experimental results demonstrated that carbon loading facilitated the conversion of strong acid sites to medium‑strong acid sites on the catalyst support, and also increased the Lewis/Brønsted (L/B) ratio. Through optimization of reaction conditions and carbon loading, complete conversion of furfural and a furfuryl alcohol selectivity as high as 99.17% were achieved at 160 °C for 4 h. The prepared catalyst maintained high furfuryl alcohol selectivity even after five cycles, owing to the protective carbon layer on the active support and the well-dispersed Cu species on its surface. DFT calculations further revealed that furfural preferentially adsorbs on the catalyst surface via the η¹(O)-aldehyde configuration, confirming the promotional role of the catalyst in furfural hydrogenation.</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":"156 10","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148985358","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
Flaky Carbon Supported NiCo Nanoparticles as Highly Efficient HER/OER Bifunctional Electrocatalysts for Water Splitting 片状碳负载纳米镍作为高效HER/OER双功能电催化剂的研究
IF 2.5 4区 化学
Catalysis Letters Pub Date : 2026-09-11 DOI: 10.1007/s10562-026-05526-x
Muxi Wang, Wenwen Luo, Ruowei Yi, Guang Li, Qingfeng Yi
{"title":"Flaky Carbon Supported NiCo Nanoparticles as Highly Efficient HER/OER Bifunctional Electrocatalysts for Water Splitting","authors":"Muxi Wang,&nbsp;Wenwen Luo,&nbsp;Ruowei Yi,&nbsp;Guang Li,&nbsp;Qingfeng Yi","doi":"10.1007/s10562-026-05526-x","DOIUrl":"10.1007/s10562-026-05526-x","url":null,"abstract":"<div><p>Bifunctional non-noble-metal electrocatalysts (NiCo@CN-sh) exhibiting high efficiency for both the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) were successfully synthesized via a simple pyrolysis method. By modulating the nickel-cobalt ratio and the organic carbon source, a catalyst system with a three-dimensional hierarchical porous structure was constructed, enabling efficient overall water splitting in alkaline media. The results demonstrate that the Ni<sub>1</sub>Co<sub>3</sub>@CN-sh sample exhibits remarkable OER activity, requiring an overpotential of only 191 mV to achieve a current density of 100 mA cm<sup>−2</sup>, while also displaying a low HER overpotential of 194 mV. Its performance is comparable to that of commercial noble-metal benchmarks (Pt/C and IrO<sub>2</sub>). In a two-electrode overall water splitting electrolyzer employing Ni<sub>1</sub>Co<sub>3</sub>@CN-sh as both the cathode and anode (configured as (-) Ni<sub>1</sub>Co<sub>3</sub>@CN-sh || Ni<sub>1</sub>Co<sub>3</sub>@CN-sh (+)), a cell voltage of merely 1.796 V was required to attain a current density of 100 mA cm<sup>−2</sup>, surpassing the performance of a noble-metal-based reference system. Notably, the catalyst demonstrated remarkable stability during alkaline water electrolysis at an elevated temperature of 80 °C and a near-industrial current density of 500 mA cm<sup>−2</sup>, maintaining stable operation for over 200 h with a cell voltage of approximately 1.84 V. This underscores its potential for practical industrial applications. This study not only provides a promising alternative to noble-metal-based catalysts but also offers a new design strategy for developing efficient and robust bifunctional electrocatalysts for overall water splitting.</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":"156 10","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148927491","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
FeWO4/g-C3N5 Nanocomposite: A Reusable Photocatalyst for N-Alkylation of Indazolones Under Blue LED FeWO4/g-C3N5纳米复合材料:蓝色LED下茚唑酮n -烷基化的可重复使用光催化剂
IF 2.5 4区 化学
Catalysis Letters Pub Date : 2026-09-10 DOI: 10.1007/s10562-026-05523-0
Kumar Aravindraj, Selvaraj Mohana Roopan
{"title":"FeWO4/g-C3N5 Nanocomposite: A Reusable Photocatalyst for N-Alkylation of Indazolones Under Blue LED","authors":"Kumar Aravindraj,&nbsp;Selvaraj Mohana Roopan","doi":"10.1007/s10562-026-05523-0","DOIUrl":"10.1007/s10562-026-05523-0","url":null,"abstract":"<div><p>A highly efficient method for the synthesis of benzyl-indol-yl-phenyl-indazol-one has been successfully synthesized under blue light irradiation using FeWO<sub>4</sub>/g-C<sub>3</sub>N<sub>5</sub> photocatalyst. Using this method, the formation of C–N bonds is possible for a variety of benzyl-indol-yl-phenyl-indazol-ones in remarkable yields by using different benzyl chlorides and indol-yl-phenyl-indazolones as substrates. The high efficiency of this method has been realized by the fact that the FeWO<sub>4</sub>/g-C<sub>3</sub>N<sub>5</sub> photocatalyst can be reused up to five times for the synthesis of N-alkylated indazolones without any loss in its catalytic activity.</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":"156 10","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148927133","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
Influence of the Surface Acidity of Niobium Catalysts Modified with Phosphate in the Photocatalysis of CO2 for Conversion into Methanol and Acetic Acid 磷酸修饰铌催化剂表面酸度对CO2光催化制甲醇和乙酸的影响
IF 2.5 4区 化学
Catalysis Letters Pub Date : 2026-09-10 DOI: 10.1007/s10562-026-05495-1
Elson Oliveira, Jean Castro da Cruz, Washington Luiz Esteves Magalhaes, Caue Ribeiro
{"title":"Influence of the Surface Acidity of Niobium Catalysts Modified with Phosphate in the Photocatalysis of CO2 for Conversion into Methanol and Acetic Acid","authors":"Elson Oliveira,&nbsp;Jean Castro da Cruz,&nbsp;Washington Luiz Esteves Magalhaes,&nbsp;Caue Ribeiro","doi":"10.1007/s10562-026-05495-1","DOIUrl":"10.1007/s10562-026-05495-1","url":null,"abstract":"<div><p>Artificial photosynthesis represents a promising avenue for chemical energy storage, addressing the urgent need to mitigate carbon emissions through emerging technologies. This work investigates how phosphate-induced surface acidity in niobium photocatalysts influences the aqueous photoreduction of CO<sub>2</sub> into methanol and acetic acid. We synthesized the TT-Nb<sub>2</sub>O<sub>5</sub> catalyst via the oxidant peroxide method (OPM) using a niobium oxalate precursor, followed by mild thermal treatment at 150 °C and surface modification with varying concentrations of H<sub>3</sub>PO<sub>4</sub>. The density of C<sub>as</sub> was quantified through indirect potentiometric titration in alkaline aqueous suspensions. Photocatalytic tests were conducted in a quartz reactor saturated with CO<sub>2</sub> under UV irradiation (254 nm, 15 W) for 4 h. The catalyst modified with 0.5 mol L<sup>−1</sup> H<sub>3</sub>PO<sub>4</sub> (Nb-0.5) exhibited superior performance, achieving high selectivity for acetic acid (59%) and methanol (40%), while HCOOH and CO remained as minor intermediates (0.2%). Notably, the phosphatization process suppressed CO evolution and preserved catalytic activity over four reaction cycles, a significant improvement over non-phosphatized counterparts. Within the evaluated phosphatization conditions, the results suggest that surface acidity and textural accessibility jointly influence conversion efficiency. The specific acidity of 0.99 ± 0.07 mmol g<sup>−1</sup> was associated with the highest production rates of 267 µmol g<sup>−1</sup> h<sup>−1</sup> for acetic acid and 181 µmol g<sup>−1</sup> h<sup>−1</sup> for methanol. These findings elucidate the critical role of surface acidity modulation in phosphatized niobium systems, offering a strategic pathway for enhancing sustainable artificial photosynthesis.</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":"156 10","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10562-026-05495-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148927357","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}
引用次数: 0
Hollow Spherical Al2O3 for Enhanced Transesterification of Dimethyl Oxalate to Diethyl Oxalate 空心球形氧化铝增强草酸二甲酯制草酸二乙酯的酯交换反应
IF 2.5 4区 化学
Catalysis Letters Pub Date : 2026-09-10 DOI: 10.1007/s10562-026-05525-y
Zhoulin Hu, Jianwei Li, Chuanqi Zhang, Wenzhi Guo, Bin Dai, Chuancai Zhang
{"title":"Hollow Spherical Al2O3 for Enhanced Transesterification of Dimethyl Oxalate to Diethyl Oxalate","authors":"Zhoulin Hu,&nbsp;Jianwei Li,&nbsp;Chuanqi Zhang,&nbsp;Wenzhi Guo,&nbsp;Bin Dai,&nbsp;Chuancai Zhang","doi":"10.1007/s10562-026-05525-y","DOIUrl":"10.1007/s10562-026-05525-y","url":null,"abstract":"<div><p>This study prepared and evaluated hollow spherical (B-Al<sub>2</sub>O<sub>3</sub>) and needle-like (N-Al<sub>2</sub>O<sub>3</sub>) alumina catalysts in a fixed-bed reactor for the transesterification of dimethyl oxalate (DMO) with ethanol (EtOH) to produce diethyl oxalate (DEO), using commercial alumina (C-Al<sub>2</sub>O<sub>3</sub>) as a reference. Experimental results indicated that catalytic activity followed the order B-Al<sub>2</sub>O<sub>3</sub> &gt; N-Al<sub>2</sub>O<sub>3</sub> &gt; C-Al<sub>2</sub>O<sub>3</sub>. At 140 °C and a space velocity of 0.2 h<sup>–1</sup>, B-Al<sub>2</sub>O<sub>3</sub> achieved a DMO conversion of 100%, with a DEO selectivity of 84.9% and an ethyl methyl oxalate (EMO) selectivity of 15.1%. The superior performance of B‑Al<sub>2</sub>O<sub>3</sub> originated from its largest specific surface area (202.52 m<sup>2</sup>/g), abundant weak acid‑base sites, and high oxygen vacancies that served as Lewis acid sites, providing more accessible active sites and promoting reactant activation. In situ DRIFTS results suggested a possible nucleophilic substitution pathway for the reaction, involving the replacement of CH<sub>3</sub>O − in DMO by C<sub>2</sub>H<sub>5</sub>O− from EtOH to form DEO. Deactivation studies revealed that coke deposition primarily caused catalyst deactivation; however, catalytic activity could be fully restored after regeneration. This study highlighted the morphological advantages of hollow spherical alumina and elucidated its structure–activity relationship, offering a design strategy for developing efficient catalysts for the green synthesis of DEO.</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":"156 10","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148927134","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
Confinement of Nickel Nanoparticles in Tailored MCF via Removable Carbon Template: Enhanced DRM Activity and Sintering Resistance 通过可移动碳模板在定制MCF中限制镍纳米颗粒:增强DRM活性和抗烧结性能
IF 2.5 4区 化学
Catalysis Letters Pub Date : 2026-09-10 DOI: 10.1007/s10562-026-05504-3
Chao Hu, Pengcheng Dai, Minghui Li, Yaoyao Xu, Ziwen Zhao, Dingyi Jing, ShenQiao Song
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