ChemCatChem最新文献_第6页

Sustainable Production of BioAIE Materials From Biomass

IF 3.8 3区化学

ChemCatChem Pub Date : 2024-11-13 DOI: 10.1002/cctc.202401510

Weiren Zhong, Yuting Lin, Zhichen Zhao, Xu-Min Cai, Bo Zhang

引用次数: 0

How Ir–Rh Alloys Improve Electrochemical Ammonia Oxidation Activity Studied by Density Functional Theory

IF 3.8 3区化学

ChemCatChem Pub Date : 2024-11-13 DOI: 10.1002/cctc.202401177

Brendan J. R. Laframboise, Shayne J. Johnston, Prof. Leanne D. Chen

{"title":"How Ir–Rh Alloys Improve Electrochemical Ammonia Oxidation Activity Studied by Density Functional Theory","authors":"Brendan J. R. Laframboise, Shayne J. Johnston, Prof. Leanne D. Chen","doi":"10.1002/cctc.202401177","DOIUrl":"https://doi.org/10.1002/cctc.202401177","url":null,"abstract":"The electrochemical ammonia oxidation reaction (AOR) has applications in hydrogen storage and ammonia waste remediation. Using density functional theory, we investigate the mechanism of AOR on Ir, Rh, and their alloys at varied atomic ratios (<math></math>, <math></math>, and <math></math>) toward <math></math>(g), <math></math>(aq), and <math></math>(aq) formation. This work introduces a method for computational alloy design by considering both electronic energy and configurational entropy. The structures considered are selective to <math></math>(g) formation and all favored *N–N coupling. An <math></math> alloy was found to reduce the theoretical onset potential for <math></math>(g) formation relative to pure Ir while not exhibiting a downhill coupling step corresponding to catalyst poisoning by *N as shown for pure Rh, consistent with previous experimental work. The formation of <math></math>(aq) and <math></math>(aq) demand significantly higher potentials, typically limited by the final hydroxylation step before desorption.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"17 4","pages":""},"PeriodicalIF":3.8,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cctc.202401177","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143439009","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

Production of Tagatose from Galactose with CaO at Room Temperature

IF 3.8 3区化学

ChemCatChem Pub Date : 2024-11-13 DOI: 10.1002/cctc.202401533

Jikai Zhao, Ethan Cruz, Xiaolei Shi, Scott A. Rankin, George W. Huber

引用次数: 0

Chalcogen-Bonding Catalyzed In Situ Trityl Cation Activation for C—C Bond Forming Reactions

IF 3.8 3区化学

ChemCatChem Pub Date : 2024-11-13 DOI: 10.1002/cctc.202401683

Dr. Niklas Lohmann, Kevin Fengler, Dr. Alica C. Keuper, Dr. Olga García Mancheño

{"title":"Chalcogen-Bonding Catalyzed In Situ Trityl Cation Activation for C—C Bond Forming Reactions","authors":"Dr. Niklas Lohmann, Kevin Fengler, Dr. Alica C. Keuper, Dr. Olga García Mancheño","doi":"10.1002/cctc.202401683","DOIUrl":"https://doi.org/10.1002/cctc.202401683","url":null,"abstract":"In this work, the use of chalcogen bonding for the catalytic activation of trityl cation by chloride abstraction from bench stable trityl chloride and further application in C—C bond forming reactions is reported. In particular, telluronium salts bearing noncoordinative counter anions such as BArF24 proved highly efficient. Thus, low catalyst loading of 1 mol% allows for the trapping of the in situ generated trityl cation in a Friedel–Crafts reaction, as well as its use as catalyst in the carbonyl-ene cyclization of citronellal or as hydride-type oxidant in diastereoselective C—H functionalization/cyclization of tetrahydroisoquinoline derivatives. A new family of chiral chalcogen–triazolium salts presenting the chirality in the central backbone was also designed and employed in the C—H functionalization reaction, slightly outperforming hydrogen and halogen bonding activation. Although no appreciable chirality transfer has been achieved so far, those simple and modular structures might open new possibilities toward enantioselective chalcogen catalysis.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"17 4","pages":""},"PeriodicalIF":3.8,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cctc.202401683","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143439011","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

CuO/CeO2 Nanocomposites With p–n Heterojunction for Photocatalytic CO2 Reduction to CH4

IF 3.8 3区化学

ChemCatChem Pub Date : 2024-11-13 DOI: 10.1002/cctc.202401485

Dr. Mengmeng Ce, Qingxiao Xue, Yixuan Wang, Kunhe Yi, Prof. Xuan-He Liu, Congyi Wu

{"title":"CuO/CeO2 Nanocomposites With p–n Heterojunction for Photocatalytic CO2 Reduction to CH4","authors":"Dr. Mengmeng Ce, Qingxiao Xue, Yixuan Wang, Kunhe Yi, Prof. Xuan-He Liu, Congyi Wu","doi":"10.1002/cctc.202401485","DOIUrl":"https://doi.org/10.1002/cctc.202401485","url":null,"abstract":"CH4 is a significant fuel with considerable industrial value. Photocatalytic CO2 reduction presents an effective strategy for producing CH4, offering a green, environmentally friendly, and sustainable solution. However, challenges such as inefficient light absorption and inadequate separation and transport of photogenerated electron-hole pairs are crucial barriers to its progress. Herein, an efficient CuO/CeO2 photocatalyst with p-n heterojunction was prepared for the photocatalytic reduction of CO2 to CH4. CuO/CeO2 exhibited improved light absorption efficiency, along with enhanced separation and transport of photogenerated charges, leading to superior photocatalytic performance compared with individual CuO and CeO2. Only CO was detected on CuO or CeO2. In contrast, CuO/CeO2 produced CH4 and C2H4 at yields of 80.2 µmol·g−1 and 2.1 µmol·g−1 within 4 h, respectively. And the selectivity for CH4 reached up to 97.4%.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"17 4","pages":""},"PeriodicalIF":3.8,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143439012","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: Nitrite Electroreduction Enhanced by Hybrid Compounds of Keggin Polyoxometalates and 1-Butyl-3-Vinylimidazolium (ChemCatChem 21/2024) 封面：凯金多氧金属酸盐和 1-丁基-3-乙烯基咪唑鎓杂化物增强亚硝酸盐电还原（ChemCatChem 21/2024）

IF 3.8 3区化学

ChemCatChem Pub Date : 2024-11-12 DOI: 10.1002/cctc.202482101

Dr. Yulin Zhou, Dr. Jing Sun, Dr. Sébastien Gallet, Dr. Jesus Raya, Prof. Corinne Boudon, Prof. Antoine Bonnefont, Prof. Laurent Ruhlmann, Dr. Vasilica Badets

{"title":"Front Cover: Nitrite Electroreduction Enhanced by Hybrid Compounds of Keggin Polyoxometalates and 1-Butyl-3-Vinylimidazolium (ChemCatChem 21/2024)","authors":"Dr. Yulin Zhou, Dr. Jing Sun, Dr. Sébastien Gallet, Dr. Jesus Raya, Prof. Corinne Boudon, Prof. Antoine Bonnefont, Prof. Laurent Ruhlmann, Dr. Vasilica Badets","doi":"10.1002/cctc.202482101","DOIUrl":"https://doi.org/10.1002/cctc.202482101","url":null,"abstract":"The Front Cover highlights an immobilization method of four Keggin-type polyoxometalates (POMs) ([H2W12O40]6−, [BW12O40]5− [SiW12O40]4−, [PW12O40]3−) by using the reaction with an ionic liquid, 1-butyl-3-vinylimidazolium (BVIM) bromide. The reaction yields a hybrid material (BVIM-POM) as a water-insoluble salt. Cross polarization 1H-31P NMR evidenced the presence of BVIM in the structure of (BVIM)3[PW12O40]. The salt is mixed with carbon powder and Nafion to prepare an ink and casted on glassy carbon electrodes. The electrochemical behavior of immobilized POMs material is preserved while the electrochemical activity for nitrite reduction is measured. Differential electrochemical mass spectrometry (DEMS) shows the formation of NO and N2O. More information can be found in the Research Article by Laurent Ruhlmann, Vasilica Badets, and co-workers (DOI: 10.1002/cctc.202400226).\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture>\u0000 </div>\u0000 </figure>\u0000 ","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"16 21","pages":""},"PeriodicalIF":3.8,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cctc.202482101","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142641698","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

Innovative Synthesis of YF3-TiO2 Acid–Base Catalysts with High Surface Area by Embedding Yttrium Trifluoride Nanoparticles in TiO2 Metallogel

IF 3.8 3区化学

ChemCatChem Pub Date : 2024-11-12 DOI: 10.1002/cctc.202401530

Roua Ben Salem, Marion Eternot, Bhagyesh Purohit, Pascal Bargiela, Nadine Essayem, Shashank Mishra

{"title":"Innovative Synthesis of YF3-TiO2 Acid–Base Catalysts with High Surface Area by Embedding Yttrium Trifluoride Nanoparticles in TiO2 Metallogel","authors":"Roua Ben Salem, Marion Eternot, Bhagyesh Purohit, Pascal Bargiela, Nadine Essayem, Shashank Mishra","doi":"10.1002/cctc.202401530","DOIUrl":"https://doi.org/10.1002/cctc.202401530","url":null,"abstract":"Combining a water-tolerant oxide such as TiO2 with yttrium fluoride is expected to provide catalysts with enhanced acid–base properties for catalytic applications in water. We present here a new strategy of incorporating preformed YF3 nanoparticles (NPs) in a TiO2-based metallogel, followed by its soft drying at room temperature to produce YF3-TiO2 xerogel with high surface area. The as-synthesized YF3-TiO2 materials were calcinated at 300 and 400°C and characterized by X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), 19F NMR spectroscopy and N2 physisorption, calorimetry of NH3 adsorption, and FT-IR of pyridine adsorption. These studies indicate that the fluorine is present under a stable form of YF3 for the catalysts calcined at 300°C. The acid–base properties of these YF3-TiO2 catalysts were investigated in a model reaction, that is, dihydroxyacetone (DHA) conversion in water, and compared with the blank TiO2 and YF3 NPs alone. The incorporation of YF3 in the TiO2 matrix leads to enhanced initial rate of DHA dehydration into pyruvaldehyde, which is slowly converted to lactic acid as the reaction progresses. This suggests that the Brønsted acidity was boosted by the presence of YF3 species via water adsorption in a dissociative form.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"17 4","pages":""},"PeriodicalIF":3.8,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143438873","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

Cover Feature: Photoactive Conjugated Polyelectrolyte-Ionomer Composite Coatings for Versatile Photoreactors (ChemCatChem 21/2024) 封面专题：用于多功能光反应器的光活性共轭聚电解质-离子聚合物复合涂层（ChemCatChem 21/2024）

IF 3.8 3区化学

ChemCatChem Pub Date : 2024-11-12 DOI: 10.1002/cctc.202482102

Bolormaa Bayarkhuu, Sunil Kumar, Hyekyung Cho, Jueun Park, Mingizem Gashaw Seid, Jeehye Byun

引用次数: 0

Stereocatalytic Effect of CeO2 for the Synthesis of trans-3-Penten-2-ol

IF 3.8 3区化学

ChemCatChem Pub Date : 2024-11-12 DOI: 10.1002/cctc.202401605

Siyang Yan, Ruilin Feng, Jiaxu Liu, Chenxi Bai, Yanlong Qi

{"title":"Stereocatalytic Effect of CeO2 for the Synthesis of trans-3-Penten-2-ol","authors":"Siyang Yan, Ruilin Feng, Jiaxu Liu, Chenxi Bai, Yanlong Qi","doi":"10.1002/cctc.202401605","DOIUrl":"https://doi.org/10.1002/cctc.202401605","url":null,"abstract":"The transformation of biobased alkanediols over heterogeneous catalysts is a major object. Here, a series of catalysts were prepared for 2,4-pentanediol dehydration to 3-penten-2-ol. Ceria-based catalysts had a unique property of showing high efficiency. More importantly, a stereocatalytic effect was observed for CeO2, yielding trans-3-penten-2-ol with a high selectivity. Raman, XPS, TPD, and TPR were carried out to clarify the catalyst structure, and the relationship between the catalyst structure and catalytic performance were studied. The amount of Lewis acid sites can hardly be correlated with the total concentrations of the oxygen vacancies. It was suggested that the geometry structure of the active sites played a crucial role in trans-3-penten-2-ol production. The oxygen vacancies originating from CeO2 consisted of active sites with a geometrical structure, which were different from those created by Pr doping CeO2. In addition, the Pr doping enhanced the oxygen migration, which resulted in side reactions, consequently, giving a lower selectivity to trans-3-penten-2-ol.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"17 4","pages":""},"PeriodicalIF":3.8,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143438841","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

Catalyst Based on Palladium-Modified MIL-53(Al) Pyrolysate for ORR in Alkaline Media

IF 3.8 3区化学

ChemCatChem Pub Date : 2024-11-12 DOI: 10.1002/cctc.202401538

K. Yu Vinogradov, R. V. Shafigulin, V. A. Davydov, Е. О. Tokranova, О. V. Korchagin, M. V. Radina, А. V. Sokolov, А. V. Bulanova

{"title":"Catalyst Based on Palladium-Modified MIL-53(Al) Pyrolysate for ORR in Alkaline Media","authors":"K. Yu Vinogradov, R. V. Shafigulin, V. A. Davydov, Е. О. Tokranova, О. V. Korchagin, M. V. Radina, А. V. Sokolov, А. V. Bulanova","doi":"10.1002/cctc.202401538","DOIUrl":"https://doi.org/10.1002/cctc.202401538","url":null,"abstract":"A catalyst for the oxygen reduction reaction (ORR) based on the metal-organic framework material MIL-53(Al) modified with palladium was synthesized. Its textural and morphological characteristics were studied using the method of adsorption porosimetry, scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray analysis (EDAX), X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and thermogravimetric analysis (TGA-DSC). The electrocatalytic properties of the synthesized material in ORR were studied by voltammetry, using a rotating disk electrode. Corrosion resistance was studied in the CV mode. It was found that the synthesized catalyst is characterized by high corrosion resistance. The tolerance of synthesized catalyst Pyr_MIL-53(Al)_Pd to the methanol was studied. The obtained catalyst was studied in a membrane electrode assembly (MEA) formed by spraying an ionomer suspension onto a gas diffusion layer (GDL). The synthesized Pyr-MIL-53 (Al)_Pd and commercial platinum (60% Pt) (HiSPEC 9100) catalysts were compared in the cathode composition, and 10% PtM (M = Ni, Mo)/CNT catalysts were used on the anode. The power density of the FC (P) was calculated based on the obtained current-voltage curves. Based on the set of characteristics, the synthesized catalyst based on MIL-53 (AL) doped with palladium is superior in efficiency to the commercial platinum catalyst.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"17 4","pages":""},"PeriodicalIF":3.8,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143438874","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