ChemPlusChem最新文献_第2页

Cover Feature: Production of Acetylene from Viable Feedstock: Promising Recent Approaches (ChemPlusChem 11/2024) 封面专题：利用可行原料生产乙炔：前景广阔的最新方法（ChemPlusChem 11/2024）

IF 3 4区化学

ChemPlusChem Pub Date : 2024-11-17 DOI: 10.1002/cplu.202481102

Dr. Yulia V. Gyrdymova, Andrei N. Lebedev, Prof. Yan-Jun Du, Dr. Konstantin S. Rodygin

引用次数: 0

Green Synthesis of Urea from Carbon Dioxide and Ammonia Catalyzed by Ultraporous Permanently Polarized Hydroxyapatite. 超多孔永久极化羟基磷灰石催化二氧化碳和氨气合成尿素的绿色方法。

IF 3 4区化学

ChemPlusChem Pub Date : 2024-11-14 DOI: 10.1002/cplu.202400705

Marc Arnau, Júlia Sanz, Pau Turon, Carlos Alemán, Jordi Sans

{"title":"Green Synthesis of Urea from Carbon Dioxide and Ammonia Catalyzed by Ultraporous Permanently Polarized Hydroxyapatite.","authors":"Marc Arnau, Júlia Sanz, Pau Turon, Carlos Alemán, Jordi Sans","doi":"10.1002/cplu.202400705","DOIUrl":"https://doi.org/10.1002/cplu.202400705","url":null,"abstract":"The sustainable synthesis of urea from ammonia (NH3) and carbon dioxide (CO2) using ultraporous permanently polarized hydroxyapatite (upp-HAp) as catalyst has been explored as an advantageous CO2-revalorization strategy. As the simultaneous activation of N2 and CO2 (single-step) demands an increase of the reaction conditions, we have re-visited the industrial two-step Bazarov reaction. upp-HAp has been designed as a stable multifunctional catalyst capable of promoting both CO2 and NH3 adsorption for their subsequent C-N bond formation. Herein we report the synthesis of 1 mmol/gcat of urea with a selectivity of 97% under strictly mild conditions (95-120 ºC and 1 bar of CO2; without applying any electrical currents or UV irradiation) which represents an efficiency of ~2% and ~30% with respect to the NH3 and CO2 content, respectively. The study of the NH3 content, products adsorbed in the catalyst, presence of intermediates and temperature of the reaction allows unveiling the great potential of upp-HAp as a green catalyst for sustainable Bazarov reactions. Results suggest that the double-step approach could be more advantageous for both synthesizing urea and as a CO2-revalorization strategy, which in turn promotes the development of specific technologies for the independent synthesis of green NH3.","PeriodicalId":148,"journal":{"name":"ChemPlusChem","volume":" ","pages":"e202400705"},"PeriodicalIF":3.0,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142613378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Solvothermal Synthesis of Medium-Entropy Oxide Spheres for Thermocatalytic Conversion of CO2 to Methanol. 溶热合成中等熵氧化物球体，用于热催化二氧化碳转化为甲醇。

IF 3 4区化学

ChemPlusChem Pub Date : 2024-11-13 DOI: 10.1002/cplu.202400691

Monika Mielniczuk, Amy Knorpp, Rishabh Shukla, Rolf Erni, Dariusz Kata, Thomas Graule, Ewa Drożdż, Michael Stuer

{"title":"Solvothermal Synthesis of Medium-Entropy Oxide Spheres for Thermocatalytic Conversion of CO2 to Methanol.","authors":"Monika Mielniczuk, Amy Knorpp, Rishabh Shukla, Rolf Erni, Dariusz Kata, Thomas Graule, Ewa Drożdż, Michael Stuer","doi":"10.1002/cplu.202400691","DOIUrl":"https://doi.org/10.1002/cplu.202400691","url":null,"abstract":"New chemical compositions and structures for medium- and high-entropy oxides (HEOs) currently represent a promising new avenue in materials research for a wide range of applications including catalysis, energy storage, and ceramics. To speed up further development, synthesis methods for multicationic oxides are needed for controlling features like morphology, porosity, and chemical compositions. In this work, mesoporous spinel oxide spheres with five cations are synthesized using solvothermal synthesis techniques. The targeted chemistry included Co, Al, Fe, and Cr as the first four cations, where the fifth cation was varied by increasing cation radii (Ga, In, Yb, Ho, or Ce). After calcination, all as-synthesized precursors led to mesoporous oxide spheres with spinel oxide structures. In order to demonstrate an example of applicability for targeting different M3+ cations, the sample containing Co, Al, Fe, Cr, and In was tested in a model reaction of thermocatalytic CO2 hydrogenation and is shown to be active with a preference to methanol formation (58% selectivity, 7.8% conversion at 300 °C). The synthesis of multicationic mesoporous spheres appears to be quite flexible in terms of possible M3+ cations compositions and is a potential material to combine targeted chemistry for applications like catalysis.","PeriodicalId":148,"journal":{"name":"ChemPlusChem","volume":" ","pages":"e202400691"},"PeriodicalIF":3.0,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142613384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 across-the-Board: Centro-Arylated Push-Pull Tetraene Chromophores and Guest-Host Polymers for Electro-Optics. 全面优化：中心芳基推挽四烯色团和用于电光学的客座聚合物。

IF 3 4区化学

ChemPlusChem Pub Date : 2024-11-12 DOI: 10.1002/cplu.202400551

Di Zhang, Jingdong Luo

{"title":"Optimization across-the-Board: Centro-Arylated Push-Pull Tetraene Chromophores and Guest-Host Polymers for Electro-Optics.","authors":"Di Zhang, Jingdong Luo","doi":"10.1002/cplu.202400551","DOIUrl":"https://doi.org/10.1002/cplu.202400551","url":null,"abstract":"The research and development of push-pull tetraene chromophores (PPT-phores) have contributed greatly to the field of organic electro-optic (EO) materials and devices since the inauguration of CLD-1 in 2001. This study is thus a systematic contribution to synthesize and characterize a series of centro-arylated PPT-phores based on strong electron-donating tetrahydroquinolinyl groups and variable strong electron-accepting tricyanofuran derivatives. In particular, we report the crystallographic data to show various packing modes of these PPT-phores with detailed information about bond length alternation and intermolecular interactions, the optical absorption edges of guest-host polymers by the Tauc model, and the anisotropy and dispersion of Pockels tensors for the poled polymers by attenuated total reflection spectroscopy. Such analyses have not been addressed to any significant extent previously and are fundamentally important to the future development of PPT-phore-based EO materials and devices. The poled films of several centro-arylated PPT-phores in polycarbonates exhibited large EO activities, excellent thermal stability, and tunable optical transparency at the telecom O- and C-band. The study demonstrates the effectiveness of π-bridge centro-arylation enabled by molecular shape modification and rigidity enhancement, over the relatively flexible and labile thioether or alkoxy groups, in rational design of hyperpolarizable PPT-phores for high-performance EO polymers.","PeriodicalId":148,"journal":{"name":"ChemPlusChem","volume":" ","pages":"e202400551"},"PeriodicalIF":3.0,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142613382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Crown Ether-Magnesium Ion Complexes: A Reliable Theoretical Estimation of Host-Guest Interaction and Binding Energies in a Solvent. 冠醚-镁离子配合物：溶剂中主客体相互作用和结合能的可靠理论估算。

IF 3 4区化学

ChemPlusChem Pub Date : 2024-11-11 DOI: 10.1002/cplu.202400599

Katarina Ćeranić, Branislav Milovanović, Milena Petković

引用次数: 0

Art and Inspiration: Edouard Benedictus and the Invention of Laminated Safety Glass. 艺术与灵感：Edouard Benedictus 和夹层安全玻璃的发明。

IF 3 4区化学

ChemPlusChem Pub Date : 2024-11-11 DOI: 10.1002/cplu.202400572

Seth C Rasmussen

引用次数: 0

The Analysis of Vibrational Spectra: Past, Present and Future. 振动光谱分析：过去、现在和未来。

IF 3 4区化学

ChemPlusChem Pub Date : 2024-11-11 DOI: 10.1002/cplu.202400461

Stewart F Parker

引用次数: 0

ChemFET Anion Sensor Based on MOF Nanoparticles. 基于 MOF 纳米粒子的 ChemFET 阴离子传感器。

IF 3 4区化学

ChemPlusChem Pub Date : 2024-11-10 DOI: 10.1002/cplu.202400622

Douglas H Banning, Audrey M Davenport, Natalie M Lakanen, Jiawei Huang, Carl K Brozek, Darren W Johnson

引用次数: 0

With a Little Help from My Friends: The Role of Detergents for Energy, Efficiency, and Hygiene in Domestic Dishwashing. 在朋友的帮助下：洗涤剂在家用洗碗机的能源、效率和卫生方面的作用。

IF 3 4区化学

ChemPlusChem Pub Date : 2024-11-08 DOI: 10.1002/cplu.202400657

Dirk P Bockmühl, Thomas J Tewes

引用次数: 0

High-Performance Intermetallic Pt₃Co/C Electrocatalyst for the Oxygen Reduction Reaction Synthesized by Pre-Lithiation Method. 用预石灰化方法合成的用于氧还原反应的高性能金属间 Pt3Co/C 电催化剂。

IF 3 4区化学

ChemPlusChem Pub Date : 2024-11-01 DOI: 10.1002/cplu.202400626

Zhengying Zhang, Dong Fang, Liyang Li, Hua Yang, Jian Liu, Feng Liu, Yong Gao, Olim Ruzimuradov

{"title":"High-Performance Intermetallic Pt3Co/C Electrocatalyst for the Oxygen Reduction Reaction Synthesized by Pre-Lithiation Method.","authors":"Zhengying Zhang, Dong Fang, Liyang Li, Hua Yang, Jian Liu, Feng Liu, Yong Gao, Olim Ruzimuradov","doi":"10.1002/cplu.202400626","DOIUrl":"10.1002/cplu.202400626","url":null,"abstract":"Fuel cells are recognized as promising alternatives to existing conventional energy systems for a sustainable future. However, the synthesis of efficient and robust platinum (Pt) based catalysts remains a challenge for practical fuel cell applications. Herein, the Pt3Co/C nanoparticles with about 4.45 nm are firstly prepared by a \"pre-lithiation-deposition\" strategy on C carrier and used as efficient electrocatalysts for cathodic oxygen reduction reaction. Notably, after heat treatment at 600 °C, the obtained Pt3Co/C-600 catalyst shows excellent mass and specific activities (MA and SA) of 0.69 A mg <math> <semantics><msubsup><mrow></mrow> <mrow><mi>P</mi> <mi>t</mi></mrow> <mrow><mo>-</mo> <mn>1</mn></mrow> </msubsup> <annotation>${_{Pt}^{ - 1} }$</annotation> </semantics> </math> and 1.01 mA cm <math> <semantics><msubsup><mrow></mrow> <mrow><mi>P</mi> <mi>t</mi></mrow> <mrow><mo>-</mo> <mn>2</mn></mrow> </msubsup> <annotation>${_{Pt}^{ - 2} }$</annotation> </semantics> </math> , respectively, which are more than one order of magnitude higher than that of Pt/C-600. In particular, after accelerated durability testing with 20k cycles, the durability of the Pt3Co/C-600 catalyst (98.3 % retention of MA) is much higher than that of Pt3Co/C-600 without pre-lithiation (42.5 % retention of MA). The alloying of Pt and Co and the use of \"pre-lithiation\" to enable strong interactions between the carbon carriers and the Pt-Co nanoparticles contributed to the increased activity and excellent stability. This work provides a new perspective for the development of high-performance and low-cost Pt alloy electrocatalysts.","PeriodicalId":148,"journal":{"name":"ChemPlusChem","volume":" ","pages":"e202400626"},"PeriodicalIF":3.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142563344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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