Applied Catalysis A: General最新文献_第9页

Trace Pt-loading transition metal hydroxides as efficient catalyst for vaporized hydrogen peroxide decomposition 痕量铂负载过渡金属氢氧化物作为气化过氧化氢分解的高效催化剂

IF 4.7 2区化学

Applied Catalysis A: General Pub Date : 2024-07-18 DOI: 10.1016/j.apcata.2024.119883

{"title":"Trace Pt-loading transition metal hydroxides as efficient catalyst for vaporized hydrogen peroxide decomposition","authors":"","doi":"10.1016/j.apcata.2024.119883","DOIUrl":"10.1016/j.apcata.2024.119883","url":null,"abstract":"<div>Vaporized hydrogen peroxide (VHP) holds great promise for the decontamination of space environment. Nevertheless, following the decontamination process, highly concentrated VHP within confined spaces is harmful to the human body. Hence, trace Pt-loading (0.57 wt%) transition metal hydroxides nanosheets anchored on Ni foam (Pt@NiAlCrFe-LDHs/NF) were prepared for VHP decomposition. Importantly, a strong electronic interaction between NiAlCrFe layer double hydroxides (NiAlCrFe-LDHs) and Pt was evidenced by XPS. Meanwhile, unique nanosheet-like morphology and rich mesoporous structure endow the catalyst with excellent performance. The catalytic activity of Pt@NiAlCrFe-LDHs/NF is approximately twice that of NiAlCrFe-LDHs/NF and seven times that of Pt/NF. The improved catalytic efficiency of Pt@NiAlCrFe-LDHs/NF results from the reduction in energy barrier for VHP decomposition reaction caused by the introduction of trace Pt. After ten recycling experiments, this catalyst still shows good durability with no significant deterioration in VHP decomposition efficiency. Finally, the growth mechanism of Pt@NiAlCrFe-LDHs/NF was also proposed and discussed.</div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141637537","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

Inhibiting effects during the co-conversion of lauric acid and anisole over Ni and NiMo catalysts 镍和镍钼催化剂在月桂酸和苯甲醚共转化过程中的抑制作用

IF 4.7 2区化学

Applied Catalysis A: General Pub Date : 2024-07-18 DOI: 10.1016/j.apcata.2024.119889

引用次数: 0

Ni0 dominated Ni/MgAl-LDO catalyst for highly efficient reductive amination of acetone to isopropylamine 用于丙酮与异丙胺高效还原胺化反应的 Ni0 主导型 Ni/MgAl-LDO 催化剂

IF 4.7 2区化学

Applied Catalysis A: General Pub Date : 2024-07-17 DOI: 10.1016/j.apcata.2024.119885

引用次数: 0

Self-coupling of electron acceptor units in conjugated microporous polymers strengthening local donor-acceptor interaction for improving photocatalytic activity 共轭微孔聚合物中电子受体单元的自偶联加强了局部供体与受体之间的相互作用，从而提高了光催化活性

IF 4.7 2区化学

Applied Catalysis A: General Pub Date : 2024-07-17 DOI: 10.1016/j.apcata.2024.119888

{"title":"Self-coupling of electron acceptor units in conjugated microporous polymers strengthening local donor-acceptor interaction for improving photocatalytic activity","authors":"","doi":"10.1016/j.apcata.2024.119888","DOIUrl":"10.1016/j.apcata.2024.119888","url":null,"abstract":"<div>The partial self-coupling of donor or acceptor unit during donor-acceptor (D-A) type CMPs synthesis is often overlooked for the effect on photocatalytic activity. Herein, we developed three D-A type CMPs, named SATE-CMP-n (n=1–3), which were constructed from triazine (TEPT) unit (A) and three salen units (D). With the rigidity of salen units increasing (the rigidity: salen-1 < salen-2 < salen-3), the self-coupling proportion of TEPT decreases. The experiments and DFT calculations reveal that salen-1 has the stronger electron-donating ability compared to salen-2 and salen-3, and that the self-coupling of TEPT units also enhances the electron-accepting ability. Therefore, SATE-CMP-1 exhibits the strongest D-A interaction and the highest separation and transfer efficiency of charge carriers, and has been used a photocatalyst for S−S and S−N coupling reactions. This work proves that the self-coupling of monomers in the construction of CMPs is not overlooked for adjusting the photocatalytic activity of catalyst.</div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141637536","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

Unveiling synergistic catalysis in reductive amination through a UiO-66-NH2@(PdAu)@MOF-808 sandwich nanostructure 揭示 UiO-66-NH2@(PdAu)@MOF-808 夹层纳米结构在还原胺化过程中的协同催化作用

IF 4.7 2区化学

Applied Catalysis A: General Pub Date : 2024-07-14 DOI: 10.1016/j.apcata.2024.119884

引用次数: 0

One-pot four-step direct synthesis of 2,5-furandicarboxylic acid from 2,5-diformylfuran under oxygen-free conditions 在无氧条件下以 2,5-二甲酰基呋喃为原料一步四步直接合成 2,5-呋喃二甲酸

IF 4.7 2区化学

Applied Catalysis A: General Pub Date : 2024-07-14 DOI: 10.1016/j.apcata.2024.119886

{"title":"One-pot four-step direct synthesis of 2,5-furandicarboxylic acid from 2,5-diformylfuran under oxygen-free conditions","authors":"","doi":"10.1016/j.apcata.2024.119886","DOIUrl":"10.1016/j.apcata.2024.119886","url":null,"abstract":"<div>2,5-Furanedicarboxylic acid (FDCA) is a valuable compound with the potential as a renewable and green alternative to terephthalic acid in polyester production. To address the issues of flammability, explosiveness, and product separation challenges associated with the current aerobic oxidation of 5-hydroxymethylfurfural (5-HMF) to FDCA route, herein, for the first time, a one-pot four-step direct reaction pathway for the synthesis of FDCA from 2,5-diformylfuran (DFF) and hydroxylamine salt is proposed. Under optimized conditions of 120 ℃ for 8 h, [HSO3-b-mim]·CF3SO3 catalyst and p-xylene-water dual liquid phase solvent, 100 % DFF conversion and 91.0 % FDCA separation yield were obtained. Notably, [HSO3-b-mim]·CF3SO3 exhibited excellent stability, maintaining its activity after being recycled more than five times. Through online experimentation and density functional theory (DFT) calculations, a four-step reaction mechanism involving aldehyde oximation, oxime dehydration, nitrile hydrolysis, and amide hydrolysis was proposed. This reaction pathway offers significant industrial application value due to its high FDCA yield, simple product separation, easy recovery and recycling of ionic liquid, and elimination of the need for oxygen.</div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141637534","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

A critical view about use of scavengers for reactive species in heterogeneous photocatalysis 关于在异相光催化中使用反应物清除剂的重要观点

IF 4.7 2区化学

Applied Catalysis A: General Pub Date : 2024-07-14 DOI: 10.1016/j.apcata.2024.119879

{"title":"A critical view about use of scavengers for reactive species in heterogeneous photocatalysis","authors":"","doi":"10.1016/j.apcata.2024.119879","DOIUrl":"10.1016/j.apcata.2024.119879","url":null,"abstract":"<div>In heterogeneous photocatalysis, different reactive species generated from the excitation of the semiconductor are responsible for the degradation of different contaminants in aqueous solution. In order to evaluate the influence of each of these reactive species on the photocatalysis process, it is common to perform an analysis using different chemical compounds, which (in theory) react selectively with only one reactive species, preventing this species from participating in the process. Questioning this analysis is the aim of this work and the reasons that lead us to this will be described and discussed. For this, different investigations were selected where this analysis was carried out on two model substrates, Rhodamine B and Phenol. With this, it was possible to determine which compounds are most used as scavengers for the different reactive species, and how these compounds influence the photodegradation process. It was possible to shown that none of the commonly used scavengers react selectively with only one reactive species, since it can also influence other reactions, either by reacting with other reactive species, with the surface of the catalyst, or with the substrate under study, among others. In our opinion, the conclusions obtained by using scavenger analysis should be carefully considered, and the compounds used should be renamed as interfering species of the photocatalytic process.</div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141709818","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

Advancements in rare earth mullite oxides (AMn2O5) for catalytic oxidation: Structure, activity and design strategies 用于催化氧化的稀土莫来石氧化物 (AMn2O5) 的研究进展：结构、活性和设计策略

IF 4.7 2区化学

Applied Catalysis A: General Pub Date : 2024-07-08 DOI: 10.1016/j.apcata.2024.119872

{"title":"Advancements in rare earth mullite oxides (AMn2O5) for catalytic oxidation: Structure, activity and design strategies","authors":"","doi":"10.1016/j.apcata.2024.119872","DOIUrl":"10.1016/j.apcata.2024.119872","url":null,"abstract":"<div>The development of rare earth catalysts is expected to reduce the dependence on noble metal catalysts in mobile and stationary sources. The AMn2O5 mullite oxide is a category of rare earth metal oxides for the catalytic oxidation of environmental pollutants, in which the A-site cations are the rare earth cations. The coexistence of the diverse Mn ions and the exposed Mn-Mn dimers in AMn2O5 mullite oxides contribute to the excellent catalytic performance for various catalytic reactions. Herein, the crystal structure and the identification of lattice oxygen of AMn2O5 mullite oxides have been discussed. Meanwhile, a comprehensive understanding of the activity and the thermal stability of AMn2O5 mullite oxides has been investigated. As a group of rare earth catalysts, the representing modification strategies with their advantages have been summarized to guide the rational design of next-generation mullite oxide catalysts. To gain a deeper understanding of AMn2O5 mullite oxides as heterogeneous catalysts, we have reviewed the publications in catalytic purification of vehicle exhaust and catalytic oxidation of volatile organic compounds, accompanied by the exploration of corresponding reaction mechanisms and the analysis of applied modification strategies. Furthermore, the perspective research direction of AMn2O5 mullite oxide catalysts has been outlined to inspire more valuable research work.</div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141637535","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

Insights into the development of greener mild zeolite dealumination routes applied to the hydrocracking of waste plastics 应用于废塑料加氢裂化的绿色温和沸石脱铝路线的开发启示

IF 4.7 2区化学

Applied Catalysis A: General Pub Date : 2024-07-08 DOI: 10.1016/j.apcata.2024.119873

Muhammad Usman Azam , Waheed Afzal , Auguste Fernandes , Inês Graça

{"title":"Insights into the development of greener mild zeolite dealumination routes applied to the hydrocracking of waste plastics","authors":"Muhammad Usman Azam , Waheed Afzal , Auguste Fernandes , Inês Graça","doi":"10.1016/j.apcata.2024.119873","DOIUrl":"https://doi.org/10.1016/j.apcata.2024.119873","url":null,"abstract":"<div>This study highlights novel, energy-efficient, environmentally friendly and less time-consuming methods to dealuminate zeolites, by forced convective steaming and use of molecular CO2. Zeolites with comparable (or superior) physicochemical properties than those of traditional dealumination techniques were produced. All dealuminated zeolites were tested for the hydrocracking of high-density polyethylene, showing considerably high activity and selectivity for lighter oils, particularly gasoline. The forced convective steamed zeolite revealed to be the best, given its high number of silanol groups, acidity and porosity, and lower environmental impact. Furthermore, bi-functional Ni-loaded dealuminated zeolites showed good stability and ability to be regenerated. Therefore, it is possible to generate hierarchical zeolites by dealumination with physicochemical and catalytic properties comparable to their rival technologies, following green chemistry metrics. Given the relevance of hierarchical zeolites in sustainable routes to produce chemicals and fuels, the potential of application of these newly developed catalysts is highly promising and vast.</div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0926860X24003181/pdfft?md5=19b12d7545b64658c0d346833e32410f&pid=1-s2.0-S0926860X24003181-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141605418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Influence of Ga doped CoMo/Al2O3 catalysts on the selective hydrogenation performance of polycyclic aromatic hydrocarbons 掺杂镓的 CoMo/Al2O3 催化剂对多环芳烃选择性加氢性能的影响

IF 4.7 2区化学

Applied Catalysis A: General Pub Date : 2024-07-08 DOI: 10.1016/j.apcata.2024.119880

引用次数: 0