Reaction Chemistry & Engineering最新文献_第3页

Quantification of the porosity in template-based ordered porous Ag electrodes and its effect on electrochemical CO2 reduction† 模板基有序多孔银电极孔隙率的量化及其对电化学CO2还原的影响。

IF 3.1 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-06-25 DOI: 10.1039/D5RE00068H

Maaike E. T. Vink-van Ittersum, Erik Betz-Güttner, Eric Hellebrand, Claudia J. Keijzer, Matt L. J. Peerlings, Peter Ngene and Petra E. de Jongh

{"title":"Quantification of the porosity in template-based ordered porous Ag electrodes and its effect on electrochemical CO2 reduction†","authors":"Maaike E. T. Vink-van Ittersum, Erik Betz-Güttner, Eric Hellebrand, Claudia J. Keijzer, Matt L. J. Peerlings, Peter Ngene and Petra E. de Jongh","doi":"10.1039/D5RE00068H","DOIUrl":"10.1039/D5RE00068H","url":null,"abstract":"The electrochemical reduction of CO2 combined with efficient CO2 capture is a promising approach to close the carbon cycle. We studied the effect of pore size on the activity and selectivity of porous Ag electrodes using template-based electrodes as model catalysts. Using polymer spheres with sizes between 115 nm and 372 nm as templates, ordered porous Ag catalysts with different pore diameters were obtained. These well-defined model systems allowed us to understand the effect of pore size on CO and H2 production. At the most cathodic potential, around −1.05 V, up to 4 times more CO than H2 was formed. The intrinsic CO production depends on the pore size, as it increases when changing the pore diameters from ∼100 nm to ∼300 nm. At pore diameters above ∼300 nm, the pore size does not affect the intrinsic CO production anymore. For the first time, FIB-SEM was used to quantitatively analyse the porosity of the electrodes and correlate it with trends in intrinsic activity. The catalyst with a pore diameter of ∼200 nm had the highest tortuosity of 2.41, which led to an increased CO production. The catalysts with a pore diameter of ∼200 nm and smaller have pore networks that are twice as long as the pore network of catalysts with ∼400 nm pores. This leads to an additional potential drop, which lowers the effective driving force for the electrochemical reaction. Disentanglement of these different factors is important for rational design of porous CO2 reduction catalysts.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 10","pages":" 2300-2310"},"PeriodicalIF":3.1,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12188718/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144525550","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}

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Highly efficient Fe3O4@Pd@C3TES catalysts for azide/nitroaromatic hydrogenation and Suzuki–Miyaura cross-coupling: the promotion of nano-porous triethoxypropylsilane as reaction cavities† 叠氮化物/硝基芳烃加氢和Suzuki-Miyaura交叉偶联的高效Fe3O4@Pd@C3TES催化剂：促进纳米多孔三乙氧基丙基硅烷作为反应腔†

IF 3.1 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-06-24 DOI: 10.1039/D5RE00113G

Xingtong Qian, Yaxuan Li, Danyang Zhu, Wenxu Chang, Zongyang Li, Guangyu Wang, Jiyao Feng, Huan Lu and Zhenhua Zhang

{"title":"Highly efficient Fe3O4@Pd@C3TES catalysts for azide/nitroaromatic hydrogenation and Suzuki–Miyaura cross-coupling: the promotion of nano-porous triethoxypropylsilane as reaction cavities†","authors":"Xingtong Qian, Yaxuan Li, Danyang Zhu, Wenxu Chang, Zongyang Li, Guangyu Wang, Jiyao Feng, Huan Lu and Zhenhua Zhang","doi":"10.1039/D5RE00113G","DOIUrl":"https://doi.org/10.1039/D5RE00113G","url":null,"abstract":"Designing superparamagnetic palladium nano catalysts that combine high catalytic efficiency, versatility across different reactions, and simple synthesis remains a key challenge in advanced catalysis, which requires careful optimization of both surface properties and nanoparticle architecture to achieve both reactivity and stability. Herein, we report a mag-core–shell structured Pd magnetic nano-catalyst (MNC), Fe3O4@Pd@C3TES, that displayed excellent catalytic performance in both hydrogenation of azides/nitroaromatics and Suzuki–Miyaura cross-coupling with broad substrate scope and good functional group tolerance. Compared to other silica coatings, a pore size of 6 nm in C3TES is key to the catalyst's capability. For a mechanistic study, Fe3O4@Pd@C3TES-catalyzed hydrogenation occurred via an in situ heterogeneous pathway, while for Suzuki–Miyaura coupling, a leaching–redeposition pathway was perceived. In both situations, the modification of alkyl groups and the nano porosity provided reaction cavities for active Pd species, enhancing both the activity and stability of the catalyst.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 10","pages":" 2321-2333"},"PeriodicalIF":3.1,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145121342","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}

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Steam reforming of methane: state of the art and novel technologies 甲烷蒸汽重整：最新技术与现状

IF 3.1 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-06-21 DOI: 10.1039/D5RE00001G

Aimaro Sanna, Dillon Openshaw, Princess Oghotomo and Giuseppe Bagnato

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Kinetically tunable, subzero-active, visual time–temperature indicators based on the permanganate–oxalate reaction† 动力学可调，亚零活性，基于高锰酸盐-草酸盐反应的视觉时间-温度指示器

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-06-16 DOI: 10.1039/D5RE00192G

Jorvani Cruz Villarreal, Emil Ljungberg, Nilojan Jehanathan, Milap Owens, Anika Li and Chad R. Borges

{"title":"Kinetically tunable, subzero-active, visual time–temperature indicators based on the permanganate–oxalate reaction†","authors":"Jorvani Cruz Villarreal, Emil Ljungberg, Nilojan Jehanathan, Milap Owens, Anika Li and Chad R. Borges","doi":"10.1039/D5RE00192G","DOIUrl":"https://doi.org/10.1039/D5RE00192G","url":null,"abstract":"Biological products and specimens often require consistent ultracold storage to preserve their integrity. Existing time–temperature indicators (TTIs) are inadequate for monitoring ultracold conditions at the individual aliquot level. We adapted the autocatalytic permanganate–oxalate reaction to create visual TTIs functional below 0 °C. Using eutectic compositions of LiClO4, NaClO4, and Mg(ClO4)2, we depressed the melting points of the reaction mixtures to −18 °C, −37 °C, and −67 °C, respectively. The incorporation of perchlorate salts as antifreeze systems did not derail the kinetic behavior of the permanganate–oxalate reaction and allowed the reactions to pause below their melting points. Here, we developed and characterized eight customized TTIs, running from five minutes at 25 °C to 7 days at −20 °C. Temperature sensitivity was consistent with Arrhenius behavior (i.e., exponential increases in run time with linear decreases in temperature). The TTIs exhibited good accuracy and reproducibility, with within-batch and between-batch run-time precision at the targeted temperatures of ≤4.8% CV and ≤7.5% CV, respectively. The average absorbance vs. time trajectories, expressed as RMSD %CVs, were 4.5% for intra-batch and 10.4% for inter-batch runs. Indicators withstood multiple freeze/thaw cycles or extended pre-freezing periods with minimal impact on reaction kinetics. Once activated and stored below their melting points, TTIs maintained color intensity for at least 12 months. This work establishes the permanganate–oxalate system in eutectic perchlorate-based antifreeze solutions as a simple, inexpensive approach for ultracold-active TTIs, offering customizable kinetics and robust performance. The described TTIs can serve to improve quality monitoring of biologicals and biospecimens during ultracold storage and handling.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 8","pages":" 1741-1757"},"PeriodicalIF":3.4,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144680940","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}

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Gas–solid two-phase flow low-temperature solid-phase method: a novel approach to mechanically synthesize heterometallic–organic frameworks 气固两相流低温固相法：机械合成异金属有机骨架的新方法

IF 3.1 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-06-16 DOI: 10.1039/D5RE00177C

Neng mei Deng, Yang Liu, Lu lu Tang, Xu cheng Fu and Jun Zhao

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An integrated reaction model of guaiacol hydrodeoxygenation using activated carbon supports: effects of support properties, metals, and solvents† 活性炭载体对愈创木酚加氢脱氧的综合反应模型：载体性质、金属和溶剂的影响

IF 3.1 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-06-11 DOI: 10.1039/D5RE00179J

Lei Yu, Robert X. Gottlieb, Jeffrey R. Page, Julia A. Valla and Matthew D. Stuber

{"title":"An integrated reaction model of guaiacol hydrodeoxygenation using activated carbon supports: effects of support properties, metals, and solvents†","authors":"Lei Yu, Robert X. Gottlieb, Jeffrey R. Page, Julia A. Valla and Matthew D. Stuber","doi":"10.1039/D5RE00179J","DOIUrl":"https://doi.org/10.1039/D5RE00179J","url":null,"abstract":"The hydrodeoxygenation (HDO) of guaiacol, a model compound for lignin-derived pyrolysis oils, was investigated using Ru and Ni catalysts supported on activated carbons derived from both commercial and renewable (food waste) sources. Comprehensive characterization of support properties including porosity, surface area, hydrophobicity, and morphology revealed their significant influence on catalyst performance. Liquid-phase HDO reactions were conducted in both aqueous and organic (decane) environments to evaluate solvent effects on reaction pathways and product distributions. Ru-based catalysts demonstrated superior activity compared to Ni-based catalysts, while supports with higher mesoporosity facilitated better metal dispersion and enhanced catalytic performance. Notably, food waste-derived activated carbon supports performed comparably or better than commercial activated carbon when combined with Ru, indicating their potential as sustainable catalyst supports. Mathematical optimization techniques were employed to estimate kinetic parameters and elucidate reaction pathways, revealing notable differences between aqueous and organic media. Specifically, methoxycyclohexanone dominated in organic medium, while cyclohexanol prevailed in aqueous medium. The optimization study identified that cyclohexanol was not an intermediate for cyclohexane production, contrary to conventional understanding. Diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) analysis provided insights into adsorption phenomena, explaining carbon balance discrepancies observed particularly in aqueous-phase reactions. This integrated experimental and computational approach advances the understanding of guaiacol HDO reaction mechanisms and provides guidance for the rational design of efficient catalysts for bio-oil upgrading.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 9","pages":" 2148-2169"},"PeriodicalIF":3.1,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144868536","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}

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Metal and non-metal oxide-supported selenium as potential industrial catalysts 金属和非金属氧化物负载的硒作为潜在的工业催化剂

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-06-10 DOI: 10.1039/D5RE00066A

Meng Ge, Tao Ju, Yiyang Zhang and Daming Yong

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NiFe2O4@SiO2-immobilized copper Schiff base complex as a versatile heterogeneous catalyst for efficient one-pot multicomponent synthesis of bioactive naphthopyran derivatives† NiFe2O4@SiO2-immobilized铜席夫碱配合物作为高效一锅多组分合成生物活性萘吡喃衍生物的多相催化剂†

IF 3.1 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-06-10 DOI: 10.1039/D5RE00146C

Sneha Paul, Thangjam Sanjurani, Anjana Gorai and Pranjit Barman

{"title":"NiFe2O4@SiO2-immobilized copper Schiff base complex as a versatile heterogeneous catalyst for efficient one-pot multicomponent synthesis of bioactive naphthopyran derivatives†","authors":"Sneha Paul, Thangjam Sanjurani, Anjana Gorai and Pranjit Barman","doi":"10.1039/D5RE00146C","DOIUrl":"https://doi.org/10.1039/D5RE00146C","url":null,"abstract":"Herein, we have presented the synthesis of a Cu(II) Schiff base metal complex immobilized on a silica-coated NiFe2O4 magnetic nanoparticle (MNP) surface, forming a novel heterogeneous and magnetically retrievable nanocatalyst, NiFe2O4@SiO2@CuSB. Comprehensive characterization through FT-IR, PXRD, SEM, EDS, TEM, SAED, VSM, BET, and XPS confirms the catalyst's structure, surface morphology, elemental composition, and properties. Using a one-pot multicomponent synthesis of naphthopyran derivatives, the catalytic performance of NiFe2O4@SiO2@CuSB was evaluated. This efficient, eco-friendly protocol enables the synthesis of naphthopyran derivatives using a diverse range of aldehydes, malononitrile, and 2-naphthol, exhibiting excellent functional group tolerance. The desired products have been synthesized in high yields without any byproducts. The heterogeneity of the solid nanocatalyst was assessed using a hot filtration test. This innovative catalyst offers a practical way to efficiently produce bioactive compounds, which have applications in medical chemistry.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 9","pages":" 2121-2136"},"PeriodicalIF":3.1,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144868534","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}

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Efficacy of mechanochemically prepared ceria–zirconia catalysts in ketonisation of acetic acid† 机械化学制备的二氧化锆催化剂在醋酸酮化反应中的作用

IF 3.1 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-06-10 DOI: 10.1039/D4RE00181H

Krutarth Pandit, Gunjan Deshmukh, Dipti Wagh, Vikram Chatake, Aniruddha Pandit, Supriyo Kumar Mondal, Atul Bari, Nancy Artioli and Haresh Manyar

{"title":"Efficacy of mechanochemically prepared ceria–zirconia catalysts in ketonisation of acetic acid†","authors":"Krutarth Pandit, Gunjan Deshmukh, Dipti Wagh, Vikram Chatake, Aniruddha Pandit, Supriyo Kumar Mondal, Atul Bari, Nancy Artioli and Haresh Manyar","doi":"10.1039/D4RE00181H","DOIUrl":"https://doi.org/10.1039/D4RE00181H","url":null,"abstract":"This work presents a comprehensive study on the catalytic and kinetic aspects of the ketonisation of acetic acid, a model volatile fatty acid, using Ce1−xZrxO2 as catalysts. Volatile fatty acids are promising biomass derived feedstock for production of drop-in sustainable aviation fuels through a series of cascade reactions, with ketonisation as the first step followed by aldol condensation and subsequent hydrogenation. A series of Ce1−xZrxO2 catalysts for ketonisation were prepared using a mechanochemical technique of ball milling, and their performance was evaluated for varying Ce/Zr mole ratios. Among the catalysts tested, Ce0.75Zr0.25O2 exhibited the highest conversion and selectivity towards the desired product, acetone. The catalyst characterisation showed the formation of nano-aggregates with an average particle size of 340.8 nm and a specific surface area of 66.2 m2 g−1. The kinetics of the reaction indicated a second-order dependence on acetic acid, while the products (acetone, water, and CO2) exhibited negative orders, suggesting competitive adsorption on the active sites of the catalyst. The activation energy for the reaction was determined to be 103.4 kJ mol−1 suggesting the surface reaction as the rate controlling step. These findings provide valuable insights into the catalytic behaviour and kinetics of the ketonisation reaction.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 9","pages":" 1994-2003"},"PeriodicalIF":3.1,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/re/d4re00181h?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144868524","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}

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Photovoltaic-driven electrocatalytic upcycling for polyethylene terephthalate plastic waste from simulated electrolysis to photovoltaic direct-driven electrolysis† 光伏驱动电催化对聚对苯二甲酸乙二醇酯塑料废物从模拟电解到光伏直接驱动电解的升级回收

IF 3.1 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-06-09 DOI: 10.1039/D5RE00166H

Jiyi Sun, Sen Yang, Chengcheng Cai, Xin Li, Huijing Ma, Yichan Wen, Yan Fang, Hongyu Song, Xufang Qian, Yixin Zhao and Tianfu Wang

{"title":"Photovoltaic-driven electrocatalytic upcycling for polyethylene terephthalate plastic waste from simulated electrolysis to photovoltaic direct-driven electrolysis†","authors":"Jiyi Sun, Sen Yang, Chengcheng Cai, Xin Li, Huijing Ma, Yichan Wen, Yan Fang, Hongyu Song, Xufang Qian, Yixin Zhao and Tianfu Wang","doi":"10.1039/D5RE00166H","DOIUrl":"https://doi.org/10.1039/D5RE00166H","url":null,"abstract":"The photovoltaic (PV)-driven electrolysis of polyethylene terephthalate (PET) plastic waste represents a sustainable pathway for resource recovery. Current research predominantly focuses on simulated electrolysis systems or integrated energy storage configurations, while practical implementation under real solar irradiation conditions remains insufficiently investigated. Herein, we report a direct PV-driven electrocatalytic strategy, capable of continuously and simultaneously upcycling PET using a NiOOH electrocatalyst. Remarkably, the catalyst exhibits stable operation for over 500 hours at 300 mA cm−2 in the laboratory, and it retains a Faradaic efficiency above 86% within 36 hours under real solar light PV-driven conditions. Through catalyst characterization, we reveal that current fluctuations inherent to solar intermittency induce structural degradation of active catalytic species, highlighting the critical need for enhanced stability optimization. This study provides a pioneering proof-of-concept direct PV-driven electrocatalytic strategy and presents a chemical engineering guideline for scaling PV-powered plastic upcycling technologies.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 9","pages":" 2114-2120"},"PeriodicalIF":3.1,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144868533","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