Applied Catalysis A: General最新文献_第4页

Charge separation engineering: The synergistic effect of oxidation half-reaction and reduction half-reaction to promote photocatalytic hydrogen production 电荷分离工程：氧化半反应和还原半反应的协同作用促进光催化制氢

IF 4.7 2区化学

Applied Catalysis A: General Pub Date : 2025-05-28 DOI: 10.1016/j.apcata.2025.120381

Cheng Yang, Xiaolong Ma, Zhiliang Jin

{"title":"Charge separation engineering: The synergistic effect of oxidation half-reaction and reduction half-reaction to promote photocatalytic hydrogen production","authors":"Cheng Yang, Xiaolong Ma, Zhiliang Jin","doi":"10.1016/j.apcata.2025.120381","DOIUrl":"10.1016/j.apcata.2025.120381","url":null,"abstract":"<div><div>With a view to effectively promote the spatial separation ability of photogenerated carriers, designing photocatalysts and photocatalytic systems with high-efficient charge separation ability is an effective strategy to solve the problem of low carrier separation efficiency in the light-induced process. The composite photocatalyst UPC-HOF-6/Mn2O3/Pt with high-efficient charge separation ability is designed by anchoring Mn2O3 with oxidation ability and Pt with reduction ability to the oxidation site and reduction site respectively, achieving the rapid separation of photogenerated electron-hole pairs. Through the analysis of electron paramagnetic resonance technology, the charge transfer direction of the composite photocatalyst under light irradiation is clarified. The hydrogen evolution activity of the optimized composite photocatalyst UPC-HOF-6/Mn2O3/Pt is 6574.9 μmol·g−1, which is 6574.9 times and 206.9 times that of UPC-HOF-6 (0 μmol g−1) and Mn2O3 (31.7 μmol g−1) respectively, showing excellent photocatalytic activity. The realization of the rapid separation of photogenerated electron-hole pairs by designing photocatalysts with high-efficient charge separation ability lays a theoretical foundation for improving the spatial separation ability of photogenerated carriers.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"704 ","pages":"Article 120381"},"PeriodicalIF":4.7,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144169024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 built-in electric field in fragmented g-C3N4@ZnIn2S4 composite boosts the generation of superoxide radicals for highly selective photocatalytic toluene oxidation 在碎片状g-C3N4@ZnIn2S4复合材料中内置的电场促进超氧自由基的产生，用于高选择性光催化甲苯氧化

IF 4.7 2区化学

Applied Catalysis A: General Pub Date : 2025-05-28 DOI: 10.1016/j.apcata.2025.120382

Mengyao Shi, Jianmin Li, Yanan Niu, Yubin Wang, Jide Wang, Changyan Guo

{"title":"The built-in electric field in fragmented g-C3N4@ZnIn2S4 composite boosts the generation of superoxide radicals for highly selective photocatalytic toluene oxidation","authors":"Mengyao Shi, Jianmin Li, Yanan Niu, Yubin Wang, Jide Wang, Changyan Guo","doi":"10.1016/j.apcata.2025.120382","DOIUrl":"10.1016/j.apcata.2025.120382","url":null,"abstract":"<div><div>The sp3 C-H bond in hydrocarbons is a ubiquitous chemical bond found in organic compounds. Due to its inherent inertness, direct chemical conversion under mild conditions is significantly restricted. In this study, we have designed and synthesized a Z-type fragmented g-C3N4@ZnIn2S4 heterojunction photocatalyst with enhanced visible light response, achieving the oxidation of inert sp3 C-H bonds under mild conditions. During the photocatalytic selective oxidation of toluene, the synthesized catalyst demonstrated a 10.2 mmol g−1 h−1 conversion rate of toluene, with a selectivity for benzaldehyde products reaching up to 80 %. Control experiments and characterization analyses revealed that the formation of the Z-type heterojunction facilitated the establishment of an internal electric field, thereby enhancing charge separation and migration efficiency. This promoted the generation of superoxide radicals (·O2-), enabling efficient transformation of toluene. This research offers new insights into the application of Z-type heterojunctions and the activation of C-H bonds.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"704 ","pages":"Article 120382"},"PeriodicalIF":4.7,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144288853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Oxidation of n-alkanes using TS-1 and H2O2: Effects of chain length and solvents TS-1和H2O2氧化正构烷烃：链长和溶剂的影响

IF 4.7 2区化学

Applied Catalysis A: General Pub Date : 2025-05-27 DOI: 10.1016/j.apcata.2025.120378

Seyeon Park , Maura Gibbs , Zhuoming Feng , Karen I. Goldberg , Daeyeon Lee , Raymond J. Gorte , John M. Vohs

{"title":"Oxidation of n-alkanes using TS-1 and H2O2: Effects of chain length and solvents","authors":"Seyeon Park , Maura Gibbs , Zhuoming Feng , Karen I. Goldberg , Daeyeon Lee , Raymond J. Gorte , John M. Vohs","doi":"10.1016/j.apcata.2025.120378","DOIUrl":"10.1016/j.apcata.2025.120378","url":null,"abstract":"<div><div>The selective oxidation of n-C8H18, n-C12H26, n-C16H34, n-C20H42, and n-C36H74 was studied with a goal of using these as models to provide insight into how to functionalize polyolefins. Reactions were carried out using a TS-1 catalyst and H2O2 in a batch reactor with different cosolvents, including methanol, acetone, acetonitrile, methyl ethyl ketone, and methyl butyl ketone. Rates decreased with increasing alkane size, possibly due to the reduced solubility of larger alkanes into the water-rich phases. Cosolvents that promote the partitioning of alkanes in the aqueous phase increased the rates. 1H NMR spectroscopy demonstrated that ketones were the primary products, although some alcohols also formed. There was preferential reaction at the 2 position in the alkanes, but reaction at central carbons was also observed. The results of this study suggest strategies for using this catalytic chemistry to functionalize polyolefins.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"704 ","pages":"Article 120378"},"PeriodicalIF":4.7,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144169022","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Mechanism exploration of Cu-SnS2-sv@GO during the process of converting cellulose hydrolysate to lactic acid under mild reaction conditions 温和反应条件下Cu-SnS2-sv@GO纤维素水解产物制乳酸的机理探讨

IF 4.7 2区化学

Applied Catalysis A: General Pub Date : 2025-05-26 DOI: 10.1016/j.apcata.2025.120371

Pingli Sun , Xinrui Wang , Shaocong Yang , Fanyao Meng , Yue Zhao , Xiaomeng Zhou , Jianing Wang , Xinjian Zhang , Zhen Wang

{"title":"Mechanism exploration of Cu-SnS2-sv@GO during the process of converting cellulose hydrolysate to lactic acid under mild reaction conditions","authors":"Pingli Sun , Xinrui Wang , Shaocong Yang , Fanyao Meng , Yue Zhao , Xiaomeng Zhou , Jianing Wang , Xinjian Zhang , Zhen Wang","doi":"10.1016/j.apcata.2025.120371","DOIUrl":"10.1016/j.apcata.2025.120371","url":null,"abstract":"<div><div>Valorization of cellulose-based materials requires overcoming the energy barrier of glucose isomerization to fructose. However, the process is often reliant on high temperatures and harsh thermal-catalytic conditions. In this study, 6 %Cu-SnS2-sv@GO aerogels were developed as catalysts to produce lactic acid (LA) from enzyme-pretreated microcrystalline cellulose. These aerogels demonstrated remarkable thermo-catalytic and photocatalytic performances. The participation of Cu significantly enhanced the Lewis acidity and the total acidity of the catalyst, thereby boosting thermo-catalytic efficiency. Notably, the catalyst facilitated glucose isomerization to fructose at relatively low temperatures, with the reaction launching around 40 °C. Furthermore, Cu doping modulates the band structure of the catalyst, enhancing its light absorbability and improving the separation efficiency of photoinduced electron-hole pairs. Fructose produced during the single thermo-catalysis process accumulates due to its slow conversion rate. In contrast, the accumulated fructose is effectively depleted during thermo-photocatalysis, significantly enhancing both the selectivity and yield of levulinic acid (LA). Among the synthesized catalysts, 6 %Cu-SnS2-sv@GO demonstrated the highest performance, achieving an optimal LA yield of 83.6 % (based on the enzymatic hydrolysate) at 80 °C under 2 hours of visible-light irradiation. These findings present a novel and efficient strategy for the high-value utilization of cellulose-based materials.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"703 ","pages":"Article 120371"},"PeriodicalIF":4.7,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144147953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Construction of heterogeneous Fe-Ce@SiC/H2O2 system and its NO removal 异相Fe-Ce@SiC/H2O2体系的构建及其对NO的去除

IF 4.7 2区化学

Applied Catalysis A: General Pub Date : 2025-05-26 DOI: 10.1016/j.apcata.2025.120374

Wenxia Zhao , Zehao Zhou , Xiaomeng Guo , Zhongyang Wang , Yicong Yu , Xin Wang , Dingchao Zhang , Yanhu Zhang

{"title":"Construction of heterogeneous Fe-Ce@SiC/H2O2 system and its NO removal","authors":"Wenxia Zhao , Zehao Zhou , Xiaomeng Guo , Zhongyang Wang , Yicong Yu , Xin Wang , Dingchao Zhang , Yanhu Zhang","doi":"10.1016/j.apcata.2025.120374","DOIUrl":"10.1016/j.apcata.2025.120374","url":null,"abstract":"<div><div>Conventional SCR denitrification technology often encounters difficulties in adapting to the flue gas scenarios characterized by low temperatures and high moisture. Therefore developing a low-temperature denitrification process that is both cost-effective and efficient is crucial. In this paper, a heterogeneous Fe-Ce@SiC/H2O2 oxidation-absorption system was constructed. The NO removal performances of this system were systematically investigated. The results show that, compared with the acidic conditions, the heterogeneous Fe-Ce@SiC/H2O2 system under the alkaline conditions exhibited better NO removal performance. Specifically, under optimal experimental conditions, the removal efficiency of NO in the Fe-Ce@SiC/H2O2 system could reach up to 87.1 %. When the circulating water flow rate was further increased to 600 ml/min, NO could be completely removed. Combined with the results of SEM, XRD, BET, XPS, EPR, the gas-liquid phase products analysis, and the radical quenching experiments, the electrochemical test, the possible reaction mechanism was proposed. The electron transfer and co-catalysis between Fe and Ce facilitated the regeneration of the metal active sites, therefore, H2O2 was enhanced to produce more •O2- radicals under the catalysis of Fe-Ce@SiC. These •O2- radicals are the principal active species for NO oxidation under the alkaline conditions, whereas •OH radicals and 1O2 are relatively less active. The purified NO is mainly converted into NO3- and a small amount of NO2- in the absorption solution. The research results not only further improve the theoretical system of NOx removal by the heterogeneous Fenton system, but also expand the applicability of this technology in the field of flue gas denitrification.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"704 ","pages":"Article 120374"},"PeriodicalIF":4.7,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144185513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Mechanism investigation on the synergistic effect between Fe5C2 and Cu in CuFeZn catalysts for the selective hydrogenation of CO2 to ethanol CO2选择性加氢制乙醇CuFeZn催化剂中Fe5C2与Cu协同作用机理研究

IF 4.7 2区化学

Applied Catalysis A: General Pub Date : 2025-05-26 DOI: 10.1016/j.apcata.2025.120375

Siyao Gu, Zhenzhen Yang, Jing Ding, Jun Li, Lei Wang, Hui Wan, Guofeng Guan

{"title":"Mechanism investigation on the synergistic effect between Fe5C2 and Cu in CuFeZn catalysts for the selective hydrogenation of CO2 to ethanol","authors":"Siyao Gu, Zhenzhen Yang, Jing Ding, Jun Li, Lei Wang, Hui Wan, Guofeng Guan","doi":"10.1016/j.apcata.2025.120375","DOIUrl":"10.1016/j.apcata.2025.120375","url":null,"abstract":"<div><div>As a promising technology, the selective hydrogenation of CO2 to ethanol using CuFeZn catalysts has attracted significant attention. This study systematically investigates the mechanism of the hydrogenation of CO2 to ethanol over the CuFeZn model catalyst using periodic density functional theory (DFT), with particular focus on the key steps in CO2 hydrogenation. The calculations indicate that the formation of the CO* species is crucial for the production of CH3CH2OH, which requires overcoming an energy barrier of 1.91 eV. The coupling of CO* with CH3* is the rate-determining step, which involves overcoming an energy barrier of 2.77 eV. Further analysis shows that the CuFeZn catalyst’s synergistic effect significantly influences CO2 activation and the coupling reaction between CO* and CH3*, thereby enhancing CH3CH2OH formation. The high catalytic performance of the CuFeZn catalyst is attributed to the synergistic interactions between the active Fe5C2 and Cu. Density of States (DOS) and Electronic Localization Function (ELF) analyses show that the elevated Cu d-band center and the high electronic localization of FeⅣ in Fe5C2 enhance the formation of CO* species, thus promoting ethanol synthesis. In summary, by utilizing multiple active components to modulate the generation of CO* species and their activation barriers for coupling with CH3*, the selective production of ethanol can be significantly improved. This study underscores the crucial role of the CuFeZn catalyst for CO2 hydrogenation to ethanol, providing valuable theoretical insights for future catalyst design and optimization.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"704 ","pages":"Article 120375"},"PeriodicalIF":4.7,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144177922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Hydrophilic porous organic polymers with fluorene-viologen units for enhanced photocatalytic hydrogen production 具有芴-紫素单元的亲水多孔有机聚合物，用于增强光催化制氢

IF 4.7 2区化学

Applied Catalysis A: General Pub Date : 2025-05-26 DOI: 10.1016/j.apcata.2025.120377

Sinem Altınışık , Gizem Yıldız , Kübra Turgut , Cansu Yayla , İmren Hatay Patır , Sermet Koyuncu

{"title":"Hydrophilic porous organic polymers with fluorene-viologen units for enhanced photocatalytic hydrogen production","authors":"Sinem Altınışık , Gizem Yıldız , Kübra Turgut , Cansu Yayla , İmren Hatay Patır , Sermet Koyuncu","doi":"10.1016/j.apcata.2025.120377","DOIUrl":"10.1016/j.apcata.2025.120377","url":null,"abstract":"<div><div>The rising energy demand and environmental concerns have intensified the search for clean energy solutions. Photocatalytic water splitting offers a promising route, yet efficiency remains limited by the need for advanced photocatalysts with enhanced light absorption, charge separation, and water interaction. Porous organic polymers (POPs) are emerging as efficient materials for solar energy conversion due to their ordered conjugated structures. This study explores the impact of a ketone moiety on the hydrophilicity and photocatalytic hydrogen evolution efficiency of fluorene-bridged bicarbazole-viologen-based POPs (POP-MB-TP(DCzFO) and POP-MB-TP(DCzF)). Our results show that POP-MB-TP(DCzF) achieves a hydrogen evolution rate of 3.37 mmol g−1 h−1, nearly twice that of POP-MB-TP(DCzFO) (1.72 mmol g−1 h−1). This improvement highlights the role of hydrophilicity in charge transport and catalytic efficiency, providing insights for designing highly efficient organic photocatalysts for sustainable hydrogen production.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"704 ","pages":"Article 120377"},"PeriodicalIF":4.7,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144169021","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Modification of Bi2WO6 containing oxygen vacancies with Au to promote selective oxidation of benzyl alcohol 含氧空位Bi2WO6的Au修饰促进苯甲醇的选择性氧化

IF 4.7 2区化学

Applied Catalysis A: General Pub Date : 2025-05-26 DOI: 10.1016/j.apcata.2025.120376

Kaiyi Sun, Tinglan Wang, Ting Shang, Hongjie Wang, Guilan Fan, Wenyan Zhao, Jingyi Li

{"title":"Modification of Bi2WO6 containing oxygen vacancies with Au to promote selective oxidation of benzyl alcohol","authors":"Kaiyi Sun, Tinglan Wang, Ting Shang, Hongjie Wang, Guilan Fan, Wenyan Zhao, Jingyi Li","doi":"10.1016/j.apcata.2025.120376","DOIUrl":"10.1016/j.apcata.2025.120376","url":null,"abstract":"<div><div>Selective oxidation of benzyl alcohol to benzaldehyde by photocatalytic technology is important in the synthesis of pharmaceuticals and fine chemicals. Here, we prepared oxygen vacancy-containing Bi2WO6 (Bi2WO6-Ov) as a precursor by hydrothermal method, and prepared 2 wt% Au/Bi2WO6-Ov by sodium borohydride reduction method. 2 wt% Au/Bi2WO6-Ov dramatically upgraded the photocatalytic performance (The conversion of benzyl alcohol was 93.8 %) by utilizing the oxygen vacancy and the low loading of Au, which is nearly 10 times higher than that of conventional Bi2WO6-Ov. A series of characterization results (XRD, XPS, UV–vis DRS, PL, SEM, TEM, etc.), combined with DFT calculations, revealed that benzyl alcohol was well adsorbed on Au NPs (nanoparticles) as an acidic site, and the oxygen vacancies acted as an electron bridge and acted as Lewis bases. The electrons were transferred from the surface of Bi2WO6-Ov to Au, upgrading the electron-hole separation efficiency, which raised the ability of benzyl alcohol oxidation. Based on the above experiments and DFT calculations, a possible mechanism is proposed.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"703 ","pages":"Article 120376"},"PeriodicalIF":4.7,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144147952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Ga-SrTiO3 modified by CuCrOx/Co3O4 dual cocatalyst for efficient photocatalytic overall water splitting CuCrOx/Co3O4双助催化剂改性Ga-SrTiO3高效光催化全水分解

IF 4.7 2区化学

Applied Catalysis A: General Pub Date : 2025-05-25 DOI: 10.1016/j.apcata.2025.120373

Yiquan Zhan , Shaohui Lai , Junzhe Jiang , Lijiao Zhong , Yongsheng Liu , Kai Yang , Jinbiao Liu , Shiyong Liu , Liqing Li , Yoshihisa Sakata

{"title":"Ga-SrTiO3 modified by CuCrOx/Co3O4 dual cocatalyst for efficient photocatalytic overall water splitting","authors":"Yiquan Zhan , Shaohui Lai , Junzhe Jiang , Lijiao Zhong , Yongsheng Liu , Kai Yang , Jinbiao Liu , Shiyong Liu , Liqing Li , Yoshihisa Sakata","doi":"10.1016/j.apcata.2025.120373","DOIUrl":"10.1016/j.apcata.2025.120373","url":null,"abstract":"<div><div>Strontium titanate (SrTiO3) holds great potential for photocatalytic overall water splitting (OWS) to produce hydrogen. However, the current SrTiO3-based photocatalysts require expensive noble metals, such as Pt and Rh. There is an urgent need to explore cost-effective alternatives using non-noble metals. Herein, Cu, Cr, and Co were used as non-noble cocatalyst to modify the surface of Ga˗doped SrTiO3 photocatalyst (Ga-STO (flux)). The characterization results of XPS and TEM revealed the CuCrOx cocatalysts generated reduced Cu0/Cu+ species for hydrogen evolution reaction. The inclusion of Cr2O3 aided in maintaining the stability of Cu0/Cu+ species. The Co3O4 cocatalysts were responsible for the oxygen evolution reaction. Under simulated sunlight, the optimal CuCrOx/Co3O4/Ga-STO (flux) sample provided the best hydrogen and oxygen production rates of 204.56 μmol·h⁻¹ and 102.28 μmol·h⁻¹ , respectively.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"703 ","pages":"Article 120373"},"PeriodicalIF":4.7,"publicationDate":"2025-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144147954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Catalytic sulfoxidation and epoxidation using oxomolybdenum compounds generated from tricarbonyl(1-methylimidazole)molybdenum(0) 三羰基（1-甲基咪唑）钼(0)生成的氧钼化合物催化亚砜化和环氧化

IF 4.7 2区化学

Applied Catalysis A: General Pub Date : 2025-05-25 DOI: 10.1016/j.apcata.2025.120372

Margarida M. Antunes, Ana C. Gomes, Isabel S. Gonçalves, Martyn Pillinger, Anabela A. Valente

{"title":"Catalytic sulfoxidation and epoxidation using oxomolybdenum compounds generated from tricarbonyl(1-methylimidazole)molybdenum(0)","authors":"Margarida M. Antunes, Ana C. Gomes, Isabel S. Gonçalves, Martyn Pillinger, Anabela A. Valente","doi":"10.1016/j.apcata.2025.120372","DOIUrl":"10.1016/j.apcata.2025.120372","url":null,"abstract":"<div><div>The scope of molybdenum carbonyl precatalysts has been expanded to include [Mo(CO)3(1-mim)3] (1) (1-mim = 1-methylimidazole) for application in epoxidation and sulfoxidation processes, using relatively ecofriendly and industrially used oxidants. The mechanisms of conversion of 1 to active species were investigated by systematically combining catalytic and characterization studies. With tert-butylhydroperoxide (TBHP), 1 gives the functionalized polyoxomolybdate (1-Hmim)4[Mo8O26(1-mim)2]·2H2O (2), which then leads to the stable salt (1-Hmim)4[Mo8O26]·2H2O (3) containing β-octamolybdate molecular anions. With H2O2, 1 gives a structurally distinct octamolybdate, (1-Hmim)4[Mo8O26] (4), with characterization data that point to the presence of [Mo8O26]n4n− chains. In the reactions of cis-cyclooctene or dl-limonene with H2O2, 4 is a reaction-induced self-separating catalyst, i.e., in the initial stages it dissolves to give a homogeneous solution, but then self-precipitates once the oxidant is consumed. In the sulfoxidation of methyl phenyl sulfide, 4 was effective in producing the sulfoxide selectively with TBHP, and the sulfone with H2O2.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"704 ","pages":"Article 120372"},"PeriodicalIF":4.7,"publicationDate":"2025-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144185512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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