ChemCatChem最新文献

{"title":"Cover Feature: Multisite Amino-Allylidene Ligands from Thermal CO Elimination in Diiron Complexes and Catalytic Activity in Hydroboration Reactions (ChemCatChem 18/2024)","authors":"Chiara Zappelli,&nbsp;Francesco Taglieri,&nbsp;Silvia Schoch,&nbsp;Giulio Bresciani,&nbsp;Tiziana Funaioli,&nbsp;Fabio Marchetti,&nbsp;Stefano Zacchini,&nbsp;Andrea Di Giuseppe,&nbsp;Marcello Crucianelli","doi":"10.1002/cctc.202481802","DOIUrl":"https://doi.org/10.1002/cctc.202481802","url":null,"abstract":"<p><b>The Cover Feature</b> represents the key intermediate in the hydroboration of a ketone promoted by a novel complex. The diiron scaffold together with the amino pendant of the hydrocarbyl ligand plays an important role in this process, with main interactions depicted as beam of lights, connecting the interacting moieties. In their Research Article, Marcello Crucianelli and co-workers present the synthesis of new diiron organometallic complexes bearing functionalities with different electronic and steric properties. A wide screening study of these molecules allowed to evaluate their catalytic activity in the hydroboration with pinacolborane, efficiently converting carbonyl compounds into organoboronates, under mild conditions. More information can be found in the Research Article by F. Marchetti, A. Di Giuseppe, M. Crucianelli, and co-workers (DOI: 10.1002/cctc.202400811).\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure>\u0000 </p>","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"16 18","pages":""},"PeriodicalIF":3.8,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cctc.202481802","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142316812","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}

{"title":"Special Collection: Catalysts and Reactors under Dynamic Conditions for Energy Storage and Conversion","authors":"Linda Klag,&nbsp;Roger Gläser,&nbsp;Ulrike Krewer,&nbsp;Karsten Reuter,&nbsp;Jan-Dierk Grunwaldt","doi":"10.1002/cctc.202401191","DOIUrl":"https://doi.org/10.1002/cctc.202401191","url":null,"abstract":"&lt;p&gt;Power-to-chemical, power-to-fuel or power-to-gas are nowadays more than ever important cornerstones on the way to decarbonize the industry. The German Energy Transition (“Energiewende”)&lt;span&gt;&lt;sup&gt;1-3&lt;/sup&gt;&lt;/span&gt; aims at decreasing the net emissions of CO&lt;sub&gt;2&lt;/sub&gt; by 65 % in 2030, 88 % by 2040 and CO&lt;sub&gt;2&lt;/sub&gt;-neutrality in 2045.&lt;span&gt;&lt;sup&gt;4&lt;/sup&gt;&lt;/span&gt; Similar targets are set in Europe (CO&lt;sub&gt;2&lt;/sub&gt;-neutrality in 2050), and other countries around the globe.&lt;/p&gt;&lt;p&gt;Dominant sources of renewable electricity are wind and photovoltaic solar power. In contrast to fossil resources, the availability of both renewables fluctuates on time scales of minutes to days. The necessity for a stable electricity grid posts new demands on rapid storage of large amounts of excessively generated energy – a completely new technological challenge since many ideas are still very new, immature and inefficient for application on the required technical scale. In addition, this opens new pathways to sustainable production of chemicals and brings together two areas that traditionally have only had few links: (1) solar and wind power including grids and (2) conversion to chemicals and fuels. In other words: physics, chemistry and engineering are combined to master the energy transition. At the core is catalysis which allows to transform the electrical energy and low-energy molecules such as water and CO&lt;sub&gt;2&lt;/sub&gt; into high-energy reactive molecules: hydrogen, hydrocarbons and fuels. These conversions rely on electrocatalysis and (mainly) heterogeneous catalysis. Application areas in focus are water electrolysis into hydrogen and oxygen as well as conversion of CO&lt;sub&gt;2&lt;/sub&gt; into hydrocarbons, especially methane, methanol, and CO.&lt;/p&gt;&lt;p&gt;Up to now, technical catalysis in both electrochemical and conventional chemical processes has been conducted at steady-state operation. However, these processes need to be considered under dynamic conditions that better represent the availability fluctuations of renewable power. From a scientific point of view this is very attractive, since the mechanism of catalytic processes at the molecular level is mostly unknown under transient reaction conditions.&lt;span&gt;&lt;sup&gt;5-7&lt;/sup&gt;&lt;/span&gt; New methods have to be developed that allow describing the molecular processes theoretically, understand them by &lt;i&gt;operando&lt;/i&gt; spectroscopic methods and develop appropriate and adaptive catalytic materials. Hence, it requires an interdisciplinary scientific approach, involving chemistry, theoretical approaches including quantum mechanics, spectroscopy including photon science, mathematics, reactor modelling, and machine learning. New materials as well as (electro-)catalytic processes have to be predicted and then developed using a knowledge-based materials design. While this approach is promising and attractive, it also poses a challenge to the next generation of scientists, who need a deep interdisciplinary knowledge in addition to their specialized s","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"16 21","pages":""},"PeriodicalIF":3.8,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cctc.202401191","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142642389","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}

{"title":"Low Temperature Sabatier CO2 Methanation","authors":"Clément Molinet-Chinaglia,&nbsp;Seema Shafiq,&nbsp;Philippe Serp","doi":"10.1002/cctc.202401213","DOIUrl":"https://doi.org/10.1002/cctc.202401213","url":null,"abstract":"<p>The CO₂ methanation reaction, or Sabatier reaction, is experiencing renewed interest in the context of large-scale recycling of point CO₂ emissions, leading to the power-to-gas technology. The reaction represents a flexible route to transform CO₂ into methane by hydrogenation with (green) dihydrogen. This exothermic transformation takes place at a reasonable rate at temperatures above 200 °C and is directed to the targeted product at low temperatures. The CO₂ methanation nevertheless remains kinetically limited due to the chemical stability of CO₂ and the high bond dissociation energy for C═O in CO₂. Therefore, the current urgent demand is for the development of catalysts and associated processes with superior activity for CO₂ activation at low temperatures. This critical review aims to overview the state of the art of this low-temperature technology using thermal, plasma and photo-assisted catalysis. We summarize research advances around low-temperature CO₂ methanation, focusing on catalyst formulations (metal, supports and promoters), reaction mechanisms and suitable activation processes. We discuss each of these critical aspects of the technology and identify the main challenges and opportunities for low temperature (≤200 °C) CO₂ methanation.</p>","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"16 24","pages":""},"PeriodicalIF":3.8,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cctc.202401213","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142862019","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}

{"title":"Copper Catalyzed Fluoroalkyl-Selenization of Olefins","authors":"Jian-Liang Yu, Qing-Qing Zhang, Yi-Fan Zhang, Ya-Wen Zuo, Ruo-Xing Jin, Xi-Sheng Wang","doi":"10.1002/cctc.202401395","DOIUrl":"https://doi.org/10.1002/cctc.202401395","url":null,"abstract":"An efficient copper catalyzed fluoroalkyl-selenization reaction of olefins has been developed, providing 1,2-difluoroarylselenides in moderate to excellent yields. The readily available ethyl bromodifluoroacetate and diphenyl diselenide (Ph2Se2) have been employed as efficient radical precursor and selenization reagents to react with olefins. The reaction features a broad substrate scope, including substituted alkenes with various functional groups.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"9 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142253382","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}

{"title":"Valorization of Glycerol to Glycerol Carbonate and Glycidol by Different Dialkyl Carbonates Utilizing Tricalcium Aluminate Hexahydrate as Transesterification Catalyst","authors":"Yvette Szabó, Sándor Balázs Nagy, Adél Anna Ádám, Rebeka Mészáros, Zoltán Kónya, Ákos Kukovecz, Pál Sipos, Szabados Márton","doi":"10.1002/cctc.202401217","DOIUrl":"https://doi.org/10.1002/cctc.202401217","url":null,"abstract":"Herein, we report a base‐catalyzed transesterification reaction of glycerol, a waste product of the biodiesel industry, with various dialkyl carbonates, which act both as reactants and solvents, to convert glycerol carbonate into an industrially useful molecular building block. The catalyst, being used for the first time, is also a waste product from industry, present in bauxite residues and in the Portland cement, simply known as tricalcium aluminate. Despite being well‐known and readily available, this solid is only extremely poorly researched catalyst, nevertheless, using dimethyl and diethyl carbonate, glycerol conversion rates &gt;80% and glycerol carbonate yields &gt;60% could be achieved in just 1 hour (under air atmosphere, and reflux). In a comparison of the performance with other catalysts commonly researched today, as well as with other components of red mud and cements, the results showed that tricalcium aluminate is excellent, cheap and largely environmentally friendly material for this purpose. Reusability studies of the catalysts have also shown that they provide high conversion and product yields even after repeated use, although different material characterization techniques showed intense glycerol‐catalyst surface interaction and intermediate product formation, the deactivating side effects of which could be avoided by catalyst regeneration steps.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"6 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142253384","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}

{"title":"Unraveling the Role of the Nitrate Ion and Solvent Water on the O‐O Bond Formation Step in Fe‐TAML Catalyzed Water Oxidation","authors":"Rong-Zhen Liao, Ying-Ying Li, Aaron Eisses, Evert Jan Meijer, Si-Xiang Chen","doi":"10.1002/cctc.202401356","DOIUrl":"https://doi.org/10.1002/cctc.202401356","url":null,"abstract":"Density functional theory‐based molecular dynamics combined with an explicit solvation model were employed to elucidate the O‐O further bond formation step in Fe‐TAML catalyzed water oxidation reaction. The water nucleophilic attack (WNA) and nitrate nucleophilic attack (NNA) on the oxo group of the high‐valent [TAML+•‐Fe5+=O] species were calculated to have comparable active barriers (24 kcal/mol vs. 22 kcal/mol). This suggests nitrate ion can behave as a co‐catalyst to promote the O‐O bond formation. More importantly, a crucial role of the presence and thermal motion of solvent water in the NNA process was observed. This was quantified by an increase of the activation energy barrier by 4 kcal/mol, determined by comparing the explicit solvent DFT‐MD simulation with implicit solvent static DFT calculation.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"5 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142253389","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}

{"title":"Computational insight into transition metal atoms anchored on B2C3P as single-atom electrocatalysts for nitrogen reduction reaction","authors":"Pengfei Ma, Liwei Jiang, Chengsong Liu, Zhijun Yang, Wei Song, Chaozheng He, Tao Zhang","doi":"10.1002/cctc.202401325","DOIUrl":"https://doi.org/10.1002/cctc.202401325","url":null,"abstract":"NH3 is not only an important chemical raw material, but also a high energy storage chemical with zero carbon. Electrocatalytic nitrogen reduction reaction (NRR), which can be driven by clean electric energy under ambient conditions, have become a promising technology for NH3 synthesis due to their environmentally friendly properties. Due to the limitations of low yield and high overpotential, efficient catalysts are urgently needed to solve this problem. In this study, based on density functional theory method and high throughput screening strategy, the NRR was investigated on transition metal single atom anchored to two-dimensional B2C3P surface (TM@B2C3P) as single-atom catalysts (SACs). The results showed that V@B2C3P and Ti@B2C3P have good catalytic properties, and the limiting potentials via the enzymatic pathway were −0.10 and −0.24 V, respectively. Furthermore, the charge density difference and crystal orbital Hamilton population calculations demonstrated that the high catalytic activity can be attributed to the obvious charge transfer between TM@B2C3P and the adsorption intermediates. It is hoped that this work can play a certain role in exploring the application of SACs in NRR.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"15 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142253383","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}

{"title":"Comparative Electrocatalysis of Hydrogen Production and Oxidation: Technetium vs Rhenium Tris(thiolate) Complexes","authors":"Xuelian Li, Yingke Wang, Cheng Xu, Zeyi Guo, Yazhu Lu, Deqing Kong, Junfei Wang, Jia Guan, Hao Tang","doi":"10.1002/cctc.202400830","DOIUrl":"https://doi.org/10.1002/cctc.202400830","url":null,"abstract":"The development of an efficient catalyst that can selectively activate and generate hydrogen molecules is in urgent demand. Inspired by the 5d rhenium‐tris(thiolate) complex that is capable of catalytically producing and oxidizing H2, the mechanisms of electrocatalytic H2 oxidation (HOR) and evolution (HER) catalyzed by the 4d technetium‐tri(thiolate) analogs, [TcL3] (L = diphenylphosphinobenzenethiolate, a noninnocent ligand), were investigated by DFT calculations, aiming at elucidating the role of the metal in metal‐ligand cooperativity. DFT calculations anticipate high reactivity in both HOR and HER for [TcL3] beyond that of its Re counterparts. Substituting the Re metal for Tc in metal‐tris(thiolate) complexes results in a greater thiyl‐radical character in the Tc complex compared to that in Re. Even when both complexes evolve H2 with similar [ECEC] mechanisms, the proton relays behave with a distinct disparity, featuring the S ligand in the Tc species as compared to the metal‐hydride in Re. The HOR mechanism also bifurcates as [TcL3]2+ is predicted to mainly occur via the ligand‐based pathway, in contrast to the predominant metal and ligand‐based reactivity for Re. This study established the role of the metal in HER and HOR while emphasizing the utility of such metal‐DPPBT cooperativity in the catalytic process.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"6 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142253393","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}

{"title":"PLS‐guided Mutant Recombination to Improve the Stability of Bovine Enterokinases Obtained by Directed Evolution","authors":"Paul Dalby, Weina Li, Weinfeng Shen, Niccolo A. E. Venanzi, Cheng Zhang, Yiwen Li, Daidi Fan","doi":"10.1002/cctc.202400943","DOIUrl":"https://doi.org/10.1002/cctc.202400943","url":null,"abstract":"Activity and thermostability are critical yet challenging to improve simultaneously in enzymes. Using directed evolution, we previously identified bovine enterokinase (EKL) variants with enhanced soluble expression and thermal stability. Partial least squares (PLS) analysis of 321 EKL variants revealed the impact of individual mutations and identified neutral or detrimental mutations in top‐performing variants. Leveraging PLS rankings, we created new variants with fewer mutations and enhanced stability. Most original and PLS‐guided variants exhibited an activity‐stability trade‐off. However, two new triple‐ and quadruple‐mutants improved both activity and stability, surpassing the trade‐off limit. Recombining PLS‐guided mutations likely eliminated neutral or harmful mutations, enhancing stability. MD simulations linked residue‐specific dynamics with stability, pinpointing critical structural regions near aggregation‐prone areas. Our findings validate PLS as a potent strategy to enhance enzyme properties, complementing directed evolution.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"34 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142268806","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}

{"title":"Advances in Catalytic Hydrogenation of Liquid Organic Hydrogen Carriers (LOHCs) Using High-Purity and Low-Purity Hydrogen","authors":"Safira Ramadhani,&nbsp;Quan Nguyen Dao,&nbsp;Yoel Imanuel,&nbsp;Muhammad Ridwan,&nbsp;Hyuntae Sohn,&nbsp;Hyangsoo Jeong,&nbsp;Keunsoo Kim,&nbsp;Chang Won Yoon,&nbsp;Kwang Ho Song,&nbsp;Yongmin Kim","doi":"10.1002/cctc.202401278","DOIUrl":"10.1002/cctc.202401278","url":null,"abstract":"<p>Liquid organic hydrogen carriers (LOHCs) are emerging as a promising solution for global hydrogen logistics. The LOHC process involves two primary chemical reactions: hydrogenation for hydrogen storage and dehydrogenation for hydrogen reconversion. In the exothermic hydrogenation reaction, hydrogen-lean compounds are converted to hydrogen-rich compounds, storing hydrogen from various sources such as water electrolysis, fossil fuel reforming, biomass processing, and industrial by-products. Conversely, hydrogen is extracted from hydrogen-rich compounds through an endothermic dehydrogenation reaction and supplied to several hydrogenation utilization offtakers. This review article discusses the development trends in catalytic hydrogenation processes for various LOHC materials, including benzene, toluene, naphthalene, biphenyl-diphenylmethane, benzyltoluene, dibenzyltoluene, and <i>N</i>-ethylcarbazole. It introduces references for catalytic hydrogenation processes utilizing both high-purity and low-purity (alternatively, mixed) hydrogen feedstocks, with particular emphasis on low-purity hydrogen applications. The direct storage of hydrogen with minimal purification, using by-product hydrogen and mixed hydrogen from hydrocarbon and biomass reforming, is crucial for the economic viability of this hydrogen carrier system.</p>","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"16 24","pages":""},"PeriodicalIF":3.8,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cctc.202401278","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142253385","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}