Reaction Chemistry & Engineering最新文献

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 3.4 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, 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, 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":" ","pages":""},"PeriodicalIF":3.4,"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}

引用次数: 0

Electrochemical hydrocarboxylation of styrene with CO2 in continuous flow† 连续流中苯乙烯与CO2的电化学羧化反应†

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-05-16 DOI: 10.1039/D5RE00162E

Jonas Mortier, Christian V. Stevens and Thomas S. A. Heugebaert

引用次数: 0

Selective transfer hydrogenation of furfural under continuous flow conditions promoted by the recoverable homogeneous Shvo's catalyst† 可回收均相Shvo催化剂†促进连续流动条件下糠醛的选择性转移加氢

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-05-13 DOI: 10.1039/D5RE00176E

Giulia Brufani, Maitê Campos, Chiara Lenzi, Luís Adriano Santos do Nascimento, Emilia Paone, Andrea Piazzi, Rita Mazzoni, Luigi Vaccaro and Francesco Mauriello

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A modular, reusable biocatalytic flow system for UDP-GlcNAc production† 用于生产UDP-GlcNAc的模块化、可重复使用的生物催化流程系统。

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-05-09 DOI: 10.1039/D5RE00127G

Tom L. Roberts, Jonathan P. Dolan, Gavin J. Miller, Marcelo A. D. Lima and Sebastian C. Cosgrove

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Photocatalytic evolution of nitrous oxide from nitric monoxide over Pt-loaded titanium dioxide under UV irradiation† 紫外光照射下负载pt的二氧化钛上氧化一氮的光催化演化

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-05-07 DOI: 10.1039/D5RE00119F

Ryo Asayama, Masanori Takemoto, Arata Suzuki, Ryuichi Watanabe, Fuminao Kishimoto, Kenta Iyoki, Tatsuya Okubo and Toru Wakihara

引用次数: 0

Physicochemical aspects of solid phase synthesis using cross-linked polymeric matrices 使用交联聚合物基质的固相合成的物理化学方面

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-04-29 DOI: 10.1039/D5RE00115C

Sebastián Pinzón-López, Eric T. Sletten, Matthias Kraume, Peter H. Seeberger and José Danglad-Flores

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Lead titanate-modified perovskite with silver and cobalt as a superior photocatalyst toward the conversion of methylene blue 钛酸铅修饰钙钛矿与银和钴作为亚甲基蓝转化的优良光催化剂

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-04-29 DOI: 10.1039/D4RE00546E

Amin Yousefvand, Mahdieh Ghobadifard and Sajjad Mohebbi

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Expression of Concern: Immobilized tetrakis(triphenylphosphine)palladium(0) for Suzuki–Miyaura coupling reactions under flow conditions 关注表达：流动条件下固定化四（三苯基膦）钯(0)用于Suzuki-Miyaura偶联反应

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-04-24 DOI: 10.1039/D5RE90015H

G. Valerie Ramaotsoa, Ian Strydom, Jenny-Lee Panayides and Darren Riley

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The kinetics of aqueous lactose hydrolysis with sulfuric acid† 硫酸水解乳糖的动力学研究

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-04-23 DOI: 10.1039/D5RE00175G

Wenjia Wang, Owen J. Dziedzic, Claire R. Lesnjak, Zhuoqian Yu, James Miller, Xiaolei Shi, Jarryd R. Featherman, Scott A. Rankin and George W. Huber

{"title":"The kinetics of aqueous lactose hydrolysis with sulfuric acid†","authors":"Wenjia Wang, Owen J. Dziedzic, Claire R. Lesnjak, Zhuoqian Yu, James Miller, Xiaolei Shi, Jarryd R. Featherman, Scott A. Rankin and George W. Huber","doi":"10.1039/D5RE00175G","DOIUrl":"https://doi.org/10.1039/D5RE00175G","url":null,"abstract":"Lactose-rich Greek yogurt acid whey (GAW) is a waste stream in the dairy industry that has caused severe environmental and economic challenges to the U.S. agricultural communities. Lactose is a sugar found in dairy products that has a low sweetness value and is often difficult to digest. Lactose can be hydrolyzed into glucose–galactose syrups (GGS). However, 5-hydroxymethylfurfural (HMF) is formed which must be removed for the GGS to be used as an alternative sustainable sweetener. In this study, we model lactose hydrolysis and include the first detailed kinetic investigation of HMF formation during sulfuric-acid-catalyzed lactose hydrolysis. We systematically examined the effects of temperature, lactose concentration, pH, and reaction time on the hydrolysis process, proposed 57 possible reaction networks, and developed a kinetic model accurately describing lactose hydrolysis and HMF formation, and calculated key kinetic parameters. Our model demonstrated strong alignment with experimental data and allowed us to simulate optimal conditions for maximizing GGS yield over 89% while minimizing HMF formation by 75–80%. This study provides valuable insights for optimizing reactor design and operational strategies, improving the economic viability and sustainability of GAW valorization.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 7","pages":" 1676-1691"},"PeriodicalIF":3.4,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144472771","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

Ag-doped Ni/SiO2 catalysts for the synthesis of aromatic amines from aromatic phenol† 用掺银Ni/SiO2催化剂从芳香酚†合成芳香胺

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-04-22 DOI: 10.1039/D5RE00055F

Kun Li, Baicheng Feng, Meng Guo, Rong Qu and Yan Jin

{"title":"Ag-doped Ni/SiO2 catalysts for the synthesis of aromatic amines from aromatic phenol†","authors":"Kun Li, Baicheng Feng, Meng Guo, Rong Qu and Yan Jin","doi":"10.1039/D5RE00055F","DOIUrl":"https://doi.org/10.1039/D5RE00055F","url":null,"abstract":"Aromatic primary amines are chemical products and raw materials with a wide range of applications. However, synthesis of primary aromatic amines relies heavily on non-renewable petrochemicals as feedstock. We have prepared a catalyst for Ni/SiO2 doped Ag, and a process has been instituted to prepare aromatic primary amines, which use renewable resources as raw materials through a fixed bed reactor under ambient pressure conditions. The catalyst and process were validated using phenol synthesis of aniline as a template reaction. The resultant surface phenol conversion is 99% and aniline selectivity is 98.5%, and the by-product of the reaction is water, which is in line with the principles of green chemistry. The broad applicability of the catalysts and synthesis process was further verified by the synthesis of aromatic primary amines using the corresponding aromatic phenols. The catalysts were characterized using TEM, SEM, BET, XPS and XRD techniques to fully analyze their morphology, microstructure and elemental composition. The adsorption model was constructed based on the characterization results, and the density functional theory (DFT) calculations confirmed that after doping Ag, phenol formed shorter chemical bonds at the active site of Ni–Ag bimetal through chemical adsorption, which indicated that it had stronger adsorption energy for phenol, and the amount of electron transfer from the active site of Ni–Ag bimetal to phenol was 2.9 fold higher than that before doping, which significantly promoted the activation of reactants.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 7","pages":" 1596-1605"},"PeriodicalIF":3.4,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144472764","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