ChemCatChem最新文献_第4页

Towards Artificial Photosynthetic Assemblies Inspired by Photosynthetic Bacteria 在光合细菌的启发下实现人工光合组装

IF 4.5 3区化学

ChemCatChem Pub Date : 2024-09-13 DOI: 10.1002/cctc.202401365

Yifei Han, Zhan-Ting Li, Jia Tian

引用次数: 0

Heterogeneous Electrocatalysts for Electrochemical Cross‐coupling Reactions 用于电化学交叉偶联反应的异质电催化剂

IF 4.5 3区化学

ChemCatChem Pub Date : 2024-09-13 DOI: 10.1002/cctc.202401491

Apurba K Das, Deepak K. K. Kori

引用次数: 0

Concentration‐Dependent Thermodynamics of the Inhibitory Paths in Homogeneous Mn(I) Hydrogenation Catalysis 均相 Mn(I) 加氢催化中抑制路径的浓度热力学

IF 4.5 3区化学

ChemCatChem Pub Date : 2024-09-13 DOI: 10.1002/cctc.202401237

Wenjun Yang, Erik Nieuwlands, Ivan Chernyshov, Georgy Filonenko, Evgeny Alexandrovich Pidko

{"title":"Concentration‐Dependent Thermodynamics of the Inhibitory Paths in Homogeneous Mn(I) Hydrogenation Catalysis","authors":"Wenjun Yang, Erik Nieuwlands, Ivan Chernyshov, Georgy Filonenko, Evgeny Alexandrovich Pidko","doi":"10.1002/cctc.202401237","DOIUrl":"https://doi.org/10.1002/cctc.202401237","url":null,"abstract":"Many catalytic reactions suffer from product inhibition, which especially hard to control in homogeneous hydrogenation due to the scaling relation between the inhibited and active states of the catalyst. We recently reported one such pathway in Mn(I) hydrogenation and demonstrated that addition of alkoxide bases could affect the thermodynamic favorability of this reaction and selectively suppress the product inhibition. Since external reaction promotors are formally not involved in reaction thermodynamics, we set to investigate the explicit molecular interactions behind these apparently environmental effects. Herein, we reveal that the thermodynamic landscape of the inhibitory process exhibits a non‐monotonic dependence on the base concentration. We related this phenomenon to the presence of two dominant mechanisms operating at different base concentrations. Specifically, the base additives can enhance the ionic strength and lower the free energy of the inhibited state at low promotor concentration. At high base concentrations we suggest the formation of highly labile alcohol‐alkoxide clusters which stabilize the free alcohol and make its addition to the catalyst unfavourable, thereby suppressing the inhibition. While relatively weak, such non‐covalent interactions between reactants and reaction environment can cause substantial perturbations to the free energy of catalytic process, ultimately deciding its fate.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"114 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142253436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Recent advances of in situ insights into CO2 reduction toward fuels 就地了解二氧化碳还原成燃料的最新进展

IF 4.5 3区化学

ChemCatChem Pub Date : 2024-09-12 DOI: 10.1002/cctc.202401388

Liang Chen, Chengbin Zhang, Xingchen Jiao

引用次数: 0

Effect of TiO2 crystal phase on the catalytic transfer hydrogenation using formic acid over the Pd/TiO2 catalyst 二氧化钛晶相对钯/二氧化钛催化剂催化甲酸转移加氢的影响

IF 4.5 3区化学

ChemCatChem Pub Date : 2024-09-12 DOI: 10.1002/cctc.202401401

Shanshan Chen, Licheng Li, Lili Mu, Zelin Hua, Xuejuan Zhao, Chenxuanzhi Ruan

{"title":"Effect of TiO2 crystal phase on the catalytic transfer hydrogenation using formic acid over the Pd/TiO2 catalyst","authors":"Shanshan Chen, Licheng Li, Lili Mu, Zelin Hua, Xuejuan Zhao, Chenxuanzhi Ruan","doi":"10.1002/cctc.202401401","DOIUrl":"https://doi.org/10.1002/cctc.202401401","url":null,"abstract":"The influence of crystal phase of TiO2 on the catalytic performance of transfer hydrogenation using formic acid (HCOOH) over Pd/TiO2 catalyst has not been clarified before. Herein, Pd/TiO2 catalysts with four typical TiO2 crystal phases, i.e., rutile, anatase, brookite and TiO2(B), were synthesized and analyzed. The catalytic results showed that the TiO2 crystal phase could vary the transfer hydrogenation performance of the Pd/TiO2 catalysts by several to tens of times, which was in the following tendency: Pd/Rutile > Pd/Anatase > Pd/Brookite > Pd/TiO2(B). Detailed comparison manifests the Pd dispersion state is obviously different on various TiO2 surfaces, which the relatively small particle size and more metallic are observed on Pd/Rutile and Pd/Anatase catalysts, contributing to the high catalytic performance. The reaction mechanism study further indicates that HCOOH on Pd/Rutile is more liable to be dehydrogenated than that on other Pd/TiO2 catalysts, especially for the transformation of bidentate to monodentate formate. Pd/Brookite shows the relatively highest selectivity of HCOOH dehydration. However, it is difficult for the HCOOH dehydrogenation to occur on Pd/TiO2(B). This work elucidates the roles of TiO2 crystal phase in Pd/TiO2 catalysts for the transfer hydrogenation reaction, which is expected to facilitate the development of efficient catalysts.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"7 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142208893","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Optimization and reaction kinetics of catalytic transfer hydrogenation of 5‐hydroxymethylfurfural to 2, 5‐dimethylfuran over CuCoOx catalysts CuCoOx 催化剂催化 5-羟甲基糠醛转移加氢制 2，5-二甲基呋喃的优化和反应动力学

IF 4.5 3区化学

ChemCatChem Pub Date : 2024-09-11 DOI: 10.1002/cctc.202401412

Ziyi Yan, Xiaofeng Wang, Fandi Zeng, Qingbo Li, Xinhua Liang

{"title":"Optimization and reaction kinetics of catalytic transfer hydrogenation of 5‐hydroxymethylfurfural to 2, 5‐dimethylfuran over CuCoOx catalysts","authors":"Ziyi Yan, Xiaofeng Wang, Fandi Zeng, Qingbo Li, Xinhua Liang","doi":"10.1002/cctc.202401412","DOIUrl":"https://doi.org/10.1002/cctc.202401412","url":null,"abstract":"From the perspective of reaction kinetics, the catalytic transfer hydrogenation (CTH) reaction of 5‐hydroxymethylfurfural (HMF) was studied in this work. Its hydrogenation product, 2,5‐dimethylfuran (DMF), was a stable and water‐insoluble biofuel alternative to gasoline. In this study, CuCoOx catalysts were used and 2‐propanol (IPA) was the hydrogen donor. The results exhibited that the HMF conversion reached 100% with the complete formation of DMF at 170 °C. Experimental and characterization results revealed that the balance of metal sites and acid sites was critical, which could inhibit the side reactions and enhance the yield of the target product. By adopting the Langmuir‐Hinshelwood‐Hougen‐Watson (LHHW) kinetic model, it was found that direct hydrogen transfer from IPA to HMF predominated over indirect transfer via H2. Moreover, the results revealed that the hydrogenolysis of BHMF to MFA was the rate‐limiting step. The kinetic study in this work is expected to provide valuable insights into the industrial optimization of the CTH reaction of HMF and lay the foundation for the study of hydrogen transfer pathways in this process.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"151 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142208894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Nickel‐Catalyzed Asymmetric Michael Addition of Acyl Imidazoles to Acrolein or β‐Ester Enones 镍催化的酰基咪唑与丙烯醛或 β 酯烯酮的不对称迈克尔加成反应

IF 4.5 3区化学

ChemCatChem Pub Date : 2024-09-10 DOI: 10.1002/cctc.202401324

Qian Shi, Jiani Sun, Jiangbo Wu, Xuehe Lu, Xiaoyu Wu

引用次数: 0

Epoxidation at Isolated Titanium Site Modeled by Ti‐Siloxy‐Polyoxometalates Built on [α–A–XW9O34]9‐ and [α–B–YW9O33]9‐ Comparative Study of their Hydrolytic Stability 建立在 [α-A-XW9O34]9- 和 [α-B-YW9O33]9- 基础上的钛硅氧聚氧金属酸盐模拟的孤立钛位点环氧化作用--水解稳定性比较研究

IF 4.5 3区化学

ChemCatChem Pub Date : 2024-09-10 DOI: 10.1002/cctc.202401106

Ludivine K/Bidi, Albert Solé-Daura, Teng Zhang, Alix Desjonquères, Josep Maria Poblet, Anna Proust, Jorge J. Carbó, Geoffroy Guillemot

{"title":"Epoxidation at Isolated Titanium Site Modeled by Ti‐Siloxy‐Polyoxometalates Built on [α–A–XW9O34]9‐ and [α–B–YW9O33]9‐ Comparative Study of their Hydrolytic Stability","authors":"Ludivine K/Bidi, Albert Solé-Daura, Teng Zhang, Alix Desjonquères, Josep Maria Poblet, Anna Proust, Jorge J. Carbó, Geoffroy Guillemot","doi":"10.1002/cctc.202401106","DOIUrl":"https://doi.org/10.1002/cctc.202401106","url":null,"abstract":"This report investigates the structural differences in a series of titanium complexes constructed from silanol functionalized polyoxometalate (SiloxPOMs) derivatives, designed to create a constrained coordination site for titanium (IV) cations, namely (THA)3[PW9O34(tBuSiO)3Ti(OiPr)] and (THA)3[SbW9O33(tBuSiO)3Ti(OiPr)]. The complexes serve as structural and functional models for titanium‐silicates, facilitating the epoxidation of allylic alcohols and alkenes by aqueous hydrogen peroxide solutions. The different activity and selectivity observed between the two derivatives are attributed to variations in the polyoxotungstic platform used, A‐type–[XW9O34]n–vs B–type –[YW9O33]3–. A combined experimental and theoretical investigation highlights the influence of these structural differences on water interaction and hydrolytic stability, with A‐type structures proving more susceptible to hydrolysis. In addition, the study also delves into the nuclearity of the active sites, a monomeric titanium (IV)‐hydroperoxide [Ti]–(OOH) active species evidenced by diffusion NMR spectroscopy, and the influence of the presence of water on catalytic performance in epoxidation reaction, thus shedding light on the relationship between catalyst stability, intermediates formed and reaction pathway. The study finally demonstrates the suitability of B‐type SiloxPOM derivatives as models for titanium‐silicates, offering insights into their stability and catalytic activity for epoxidation reactions.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"107 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142226555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Recent advantages on mass transfer structure construction in transition metal‐based cost‐effective catalyst toward alkaline oxygen evolution 过渡金属基低成本高效能碱性氧进化催化剂传质结构构建的最新优势

IF 4.5 3区化学

ChemCatChem Pub Date : 2024-09-09 DOI: 10.1002/cctc.202401166

Xuehua Zhang, Li Zhang, Songlei Lv, Guodong Xu, Jiawei Shi, Jing Li, Weiwei Cai

{"title":"Recent advantages on mass transfer structure construction in transition metal‐based cost‐effective catalyst toward alkaline oxygen evolution","authors":"Xuehua Zhang, Li Zhang, Songlei Lv, Guodong Xu, Jiawei Shi, Jing Li, Weiwei Cai","doi":"10.1002/cctc.202401166","DOIUrl":"https://doi.org/10.1002/cctc.202401166","url":null,"abstract":"The electrochemical oxygen evolution reaction (OER) can be combined with various reactions to fabricate electrochemical energy conversion and storage devices while the slow kinetics and poor mass transfer capability at high current densities were the key constraints to its large‐scale application. Therefore, this review primarily focuses on design and optimization of mass transfer structures of TM‐metal‐based OER catalysts. Nanostructuring, porous design, and the creation of hierarchical architectures have been applied during catalyst synthesis to enhance the surface area and accessibility, thereby improving mass transfer and catalytic OER efficiency. Strategies including doping, substrate invitation, soft/hard templating has been utilized to accelerate mass transfer as well as the ion/electron conduction efficiency for the overall improvement of OER performance of the catalysts. These developments underline the critical role of advanced material design in achieving high‐performance OER catalysts and highlight the potential of TM‐based materials in cost‐effective and scalable applications.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"1 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142208898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Front Cover: Direct Catalytic Conversion of Carbon Dioxide to Liquid Hydrocarbons over Cobalt Catalyst Supported on Lanthanum(III) Ion-Doped Cerium(IV) Oxide (ChemCatChem 17/2024) 封面：以镧(III)离子掺杂的氧化铈(IV)为载体的钴催化剂将二氧化碳直接催化转化为液态烃（ChemCatChem 17/2024）

IF 3.8 3区化学

ChemCatChem Pub Date : 2024-09-09 DOI: 10.1002/cctc.202481701

Dr. Keigo Tashiro, Hikaru Konno, Akihide Yanagita, Shunta Mikami, Prof. Shuhei Shimoda, Erika Taira, Dr. David S. Rivera Rocabado, Prof. Ken-ichi Shimizu, Prof. Takayoshi Ishimoto, Shigeo Satokawa

{"title":"Front Cover: Direct Catalytic Conversion of Carbon Dioxide to Liquid Hydrocarbons over Cobalt Catalyst Supported on Lanthanum(III) Ion-Doped Cerium(IV) Oxide (ChemCatChem 17/2024)","authors":"Dr. Keigo Tashiro, Hikaru Konno, Akihide Yanagita, Shunta Mikami, Prof. Shuhei Shimoda, Erika Taira, Dr. David S. Rivera Rocabado, Prof. Ken-ichi Shimizu, Prof. Takayoshi Ishimoto, Shigeo Satokawa","doi":"10.1002/cctc.202481701","DOIUrl":"https://doi.org/10.1002/cctc.202481701","url":null,"abstract":"The Front Cover illustrates liquid hydrocarbon formation by CO2 hydrogenation through reverse water gas shift and the Fischer–Tropsch synthesis reactions over a supported cobalt catalyst. In their Research Article, Keigo Tashiro, Shigeo Satokawa, and co-workers reveal that lanthanum-doped ceria provides the oxygen vacancies which promote CO2 reduction to CO, and the supported cobalt metals produce long-chain hydrocarbons via Fischer–Tropsch synthesis. As reported by the authors, the CO2 direct Fischer–Tropsch reaction technology will contribute to reaching a bright carbon-neutral future. For more details, see the Research Article by K. Tashiro, S. Satokawa, and co-workers (DOI: 10.1002/cctc.202400261).\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture>\u0000 </div>\u0000 </figure>\u0000 ","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"16 17","pages":""},"PeriodicalIF":3.8,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cctc.202481701","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142165618","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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