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Citric acid:An efficient and green catalyst for rapid one pot synthesis of quinoxaline derivatives at room temperature

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Chinese Chemical Letters 2011年第4期22卷 389-392页

作者： Radhakrishnan Mahesh Arghya Kusum Dhar Tara Sasank T.V.N.V. Sappanimuthu Thirunavukkarasu Thangaraj Devadoss Birla Institute of Technology & Science PilaniRajasthan-333031India Orchid Chemicals and Pharmaceutical Ltd. SholinganallurChennai-600119India

The condensation of o-phenylenediamines with 1,2-dicarbonyl compounds in the presence of citric acid afforded the corresponding quinoxaline derivatives in higher yields at room temperature in ethanol,and most of the r... 详细信息

关键词： Quinoxalins Citric acid o-Phenylenediamines 1 2-Dicarbonyl compounds green catalyst

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Chitosan-immobilized Palladium Complex: a green and Highly Active Heterogeneous catalyst for Heck Reaction

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Chinese Chemical Letters 2004年第4期15卷 475-477页

作者： PuLIU LanWANG XiangYuWANG DepartmentofChemistry ZhengzhouUniversityZhengzhou450052

A green heterogeneous catalyst for Heck reaction-chitosan-immobilized palladium complex was prepared. The catalyst exhibits high activity and stereoselectivity under the moderate reaction conditions. The catalyst can be separated easily from the reaction mixture and reused after washing. Under the suitable reaction conditions, the cross-coupling of iodobenzene (ArI) with acrylic acid (AA) or acrylate can be achieved 93.3% or 99% yield of trans-cinnamic acid or trans-cinnamic ester.

关键词： Chitosan-immobilized palladium complex green catalyst Heck reaction.

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Improvement of High-efficiency green catalysts for Flue Gas Denitrification

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Meteorological and Environmental Research 2024年第4期15卷 49-51页

作者： Liyan JIN Qingyi YU Naixin ZHANG Yu WEI Xinlu YANG Yu GAO College of Environmental and Chemical Engineering Shenyang University of TechnologyShenyang 110870China

Based on the basic principle and mechanism of flue gas denitrification,the commonly used catalysts for flue gas denitrification were introduced firstly,and then the catalytic performance,stability and reaction mechanism of catalysts in the market were *** types of catalysts were studied to look for green catalysts with high activity,sulfur resistance,water vapor resistance and other *** mechanism of denitration reaction of green catalysts was discussed,and the laws of formation,propagation and consumption of active species in the reaction process were revealed to provide theoretical basis for optimizing catalyst design and improving reaction *** the research status and problems of new catalysts for flue gas denitrification were ***,the future development direction of green catalysts for flue gas denitration was discussed to improve the performance and stability of catalysts and meet the performance requirements of denitration catalysts in different industries.

关键词： Flue gas denitration green catalyst Denitration catalyst Activity Selective catalytic reduction catalyst activation

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Pseudobrookite based heterostructures for efficient electrocatalytic hydrogen evolution

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Materials Reports(Energy) 2021年第2期1卷 90-98页

作者： Niranjala Fernando Jayashree Swaminathan Francisco Carlos Robles Hernandez Gayan Priyadarshana Chanaka Sandaruwan Wenli Yang Veranja Karunaratne Zixing Wang Gehan AJAmaratunga Nilwala Kottegoda Ashokkumar Meiyazhagan Pulickel M.Ajayan Department of Design and Engineering Faculty of Science and TechnologyBournemouth UniversityDorsetBH125BBUK Department of Materials Science&NanoEngineering Rice UniversityTexas77005USA Department of Mechanical Engineering Technology University of HoustonHoustonTX77204USA Materials Science&Engineering Cullen College of EngineeringUniversity of HoustonHoustonTX77204USA Department of Materials and Mechanical Technology Faculty of TechnologyUniversity of Sri JayewardenepuraPitipanaHomagamaSri Lanka Sri Lanka Institute of Nanotechnology PitipanaHomagamaSri Lanka Department of Engineering University of CambridgeCambridgeCB21TNUK Department of Chemistry Center for Advanced Materials ResearchUniversity of Sri JayewardenepuraGangodawilaNugegodaSri Lanka

Synthesis of ultrathin heterostructures has received much attention in the recent past due to their unique physical and chemical *** this work,we report the synthesis of Fe_(2)TiO_(5)–TiO_(2)heterostructures using a simple hydrothermal technique employing natural ilmenite as the *** arranged nanostructures with interconnected nano-petals of thickness around 50 nm are *** electrocatalytic properties of the synthesized Fe_(2)TiO_(5)–TiO_(2)heterostructures are enhanced following the cathodization *** observed enhancement in the synthesized materials’electrocatalytic property can be attributed to the defect-rich Fe_(2-x)TiO_(5-x)-TiO_(2-x)*** current approach and technique discussed in this work offer a simple method to synthesize a nanostructured heterostructure material and create defects for enhancing electrocatalytic activity.

关键词： Heterostructures Cathodization green catalyst 2D materials Hydrogen evolution Electrocatalysis Pseudobrookite

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