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Melamine-assisted pyrolytic synthesis of bifunctional cobalt-based core–shell electrocatalysts for rechargeable zinc–air batteries

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Journal of Energy Chemistry 2021年第2期30卷 364-371,I0013页

作者： Jiqing Jiao Yuan Pan Bin Wang wenjuan yang Shoujie Liu Chao Zhang Institute for New Energy Materials and Low Carbon Technologies School of Material Science and EngineeringTianjin University of TechnologyTianjin 300384China College of Materials Science and Engineering Qingdao UniversityQingdao 26607JShandongChina State Key Laboratory of Heavy Oil Processing China University of Petroleum(East China)Qingdao 266580ShandongChina Key Laboratory of Applied Surface and Colloid Chemistry Ministry of EducationSchool of Chemistry and Chemical EngineeringShaanxi Normal UniversityXi'an 710119ShaanxiChina International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education Institute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060GuangdongChina College of Chemistry and Materials Science Anhui Normal UniversityWuhu 241000AnhuiChina

Designing a highly active-and stable non-noble metal bifunctional oxygen catalyst for rechargeable Znair battery remains a great challenge. Herein, we develop a facile and melamine-assisted-pyrolysis(MAP)strategy for the synthesis of core–shell Co-based electrocatalysts@N-doped carbon nanotubes(Co@CNTs)derived from metal–organic frameworks. The Co@CNTs exhibited excellent bifunctional electrocatalytic performance for both oxygen evolution and reduction. DFT calculations demonstrated that the Gibbs free energy of the rate-determining step was small enough to improve ORR activities. As a result, a Zn-air battery assembled with Co@CNTs proves a lager power density, low voltage gap between charge–discharge and excellent stability. Thus, this work offers a facile strategy to realize the synthesis of non-noble metal electrocatalyst for Zn-air battery materials with high electrochemical performance.

关键词： Oxygen evolution reaction Oxygen reduction reaction Controllable synthesis Co@Carbon nanotubes Zn-air battery

Atomic iron on mesoporous N-doped carbon to achieve dehydrogenation reaction at room temperature

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Nano Research 2020年第11期13卷 3075-3081页

作者： Zheng Chen wenjuan yang Yue Wu Chao Zhang Jun Luo Chen Chen Yadong Li Key Laboratory of Functional Molecular Solids Ministry of EducationAnhui Key Laboratory of Molecule-Based MaterialsCollege of Chemistry and Materials ScienceAnhui Normal UniversityWuhu241000China International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education Institute of Microscale OptoelectronicsShenzhen UniversityShenzhen518060China Department of Chemistry Tsinghua UniversityBeijing100084China View author publications Center for Electron Microscopy Tianjin University of TechnologyTianjin300384China

Atomic non-noble metal materials show the potential to substitute noble metals in ***,melamine formaldehyde resin is developed to synthesize atomic iron on mesoporous nitrogen-doped *** triazine units with abundant nitrogen content and cavity can realize effectively anchoring of single metal *** atomic iron with unique charge and coordination characteristics shows superior catalytic performance in dehydrogenation *** N-heterocycles compounds and amines can be efficiently dehydrogenated into the corresponding products at room temperature,which is the mildest of all reported reaction conditions even when noble metal catalysts are ***,development of atomic non-noble metal catalysts with mesoporous structure may provide an effective way to realize the substitution for noble metals in heterogeneous catalysis.

关键词： atomic dispersion non-noble metal nitrogen-doped carbon mesoporous structure dehydrogenation

A Highly Efficient and Selective Water-Soluble Bimetallic Catalyst for Hydrogenation of Chloronitrobenzene to Chloroaniline

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China Petroleum Processing & Petrochemical Technology 2015年第2期17卷 26-31页

作者： Zhou Yafen yang wenjuan Zhou Limei Wang Manman Ma Xiaoyan Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province College of Chemistry and Chemical Engineering China West Normal University College of Materials and Chemistry & Chemical Engineering Chengdu University of Technology

Selective hydrogenation of chloronitrobenzene(CNB) to chloroaniline(CAN) catalyzed by water-soluble Ru/Pt bimetallic catalyst in an aqueous-organic biphasic system was studied. It was found that the catalytic activity increased obviously due to the addition of platinum. Ru/Pt bimetallic catalysts exhibited a strong synergistic effect when the molar ratio of Pt was in the range of 5%—80%. Under the mild conditions including a temperature of 25 ℃, a hydrogen pressure of 1.0 MPa and a Pt molar ratio of 20%, the conversion of p-chloronitrobenzene(p-CNB) reached 99.9%, with the selectivity to p-chloroaniline(p-CAN) equating to 99.4%. The Ru/Pt catalyst also showed high activity and selectivity for the hydrogenation of other chloro- and dichloro-nitrobenzenes with different substituted positions. In addition, the catalyst can be recycled five times without significant loss of activity.

关键词： water-soluble bimetallic catalyst hydrogenation chloronitrobenzene chloroaniline

Fine-tuning inverse metal-support interaction boosts electrochemical transformation of methanol into formaldehyde based on density functional theory

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Chinese Chemical Letters 2021年第8期32卷 2489-2494页

作者： wenjuan yang Junjun Li Xiaoya Cui Chenhuai yang Yiting Liu Xianwei Zeng Zhicheng Zhang Qitao Zhang SZU-NUS Collaborative Innovation Centre for Optoelectronic Science&Technology International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of EducationInstitute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060China Tianjin Key Laboratory of Molecular Optoelectronic Sciences Department of ChemistrySchool of ScienceTianjin University&Collaborative Innovation Centre of Chemical Science and EngineeringTianjin 300072China Centre for Programmable Materials School of Materials Science and EngineeringNanyang Technological UniversitySingapore 639798Singapore Hanshan Normal University Chaozhou 521041China Zhe Jiang Fenghong New Material Co. LtdHuzhou 313300China

Different from traditional metal-support heterogenous catalysts,inverse heterogeneous catalysts,in which the surface of metal is decorated by metal oxide,have recently attracted increasing interests owing to the unique interracial effect and electronic ***,a deep insight into the effect of metaloxide interaction on the catalytic performance still remains a great *** our work,an inverse hematite/palladium(Fe_(2) O_(3)/Pd) hybrid nanostructure,i.e.,the active Fe_(2) O_(3) ultrathin oxide layers partially covering on the surface of Pd nanoparticles(NPs),exhibited superior electrocatalytic performance towards methanol oxidation reaction(MOR) as compared to the bare Pd NPs based on density functional theory *** charge could transfer from Pd to Fe_(2) O_(3) driven by the built-in potential at the interface of Pd and Fe_(2) O_(3),which favors the downshift of d band center of *** the assistance of interfacial hydroxyl OH*,the cleavage of O—H and C—H in CH_(3) OH could take place much easily with lower barrier ene rgy on Fe_(2) O_(3)/Pd than that on pure Pd via two electrons transferring reaction *** results highlight that the syne rgy of Pd and Fe_(2) O_(3) at the interface could facilitate the electrochemical transformation of methanol into formaldehyde assisted with interfacial hydroxyl OH*.

关键词： Inverse metal-support interaction Heterostructure Fe_(2)O_(3)/Pd Electrochemical methanol oxidation DFT

An efficient heterogeneous procedure for the catalytic acetalization and ketalization at room temperature under solvent-free condition

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Chinese Science Bulletin 2008年第10期53卷 1484-1488页

作者： GAO Shan LIANG XueZheng CHENG WenPing WANG wenjuan yang JianGuo Shanghai Key Laboratory of Green Chemistry and Chemical Process East China Normal University Shanghai 200062 China

A novel carbon-based strong acid catalyst, methylnaphthalenesulfonic acid-formaldehyde condensate, has been synthesized successfully. The catalytic activity for acetalization and ketalization at room temperature under solvent-free condition was investigated. The results showed that the novel catalyst was very efficient for the reaction. Also the novel heterogeneous catalyst owned the advantages of high activity, wide applicability, strikingly simple work-up procedure, non-pollution, stability and reusability, which made the catalyst hold great potential for the "green process" .

关键词：碳酸催化剂缩醛室内温度溶剂

High efficient acetalization of carbonyl compounds with diols catalyzed by novel carbon-based solid strong acid catalyst

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Chinese Science Bulletin 2007年第21期52卷 2892-2895页

作者： GAO Shan LIANG XueZheng WANG wenjuan CHENG WenPing yang JianGuo Shanghai Key Laboratory of Green Chemistry and Chemical Process East China Normal University Shanghai 200062 China

The novel carbon-based acid catalyst has been applied to catalyzing the acetalization and ketalization. The results showed that the catalyst was very efficient with the average yield over 93%. The novel het- erogeneous catalyst has the advantages of high activity, wide applicability even to 7-membered ring acetals, strikingly simple workup procedure, non-pollution, and reusability, which will contribute to the green process greatly.

关键词：多环芳烃绿色反应炭化过程二醇

Carbon Monoxide Signal Breaks Primary Seed Dormancy by Transcriptional Silence of DOG1 in Arabidopsis thaliana

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Phyton-International Journal of Experimental Botany 2020年第3期89卷 633-643页

作者： Danni He Guoli Deng Songpei Ying wenjuan yang Jiali Wei Ping Li Shanghai Key Laboratory of Bio-Energy Crops Research Center for Natural ProductsPlant Science CenterSchool of Life SciencesShanghai UniversityShanghai200444China

Primary seed dormancy is an adaptive strategy that prevents germination for viable seeds in harsh environment,ensuring seeds germination under favorable *** inducing seeds germination in a controllable manner is important for crop *** searching the chemicals that efficiently breaks seed dormancy is ***1 protein abundance in the freshly harvested seed is high,and its level is correlated to seed dormancy intensity,thus DOG1 is regarded as the timer to evaluate the seed dormancy *** this study,we found the carbon monoxide(CO)donor treatment,the transgenic line with high CO content,showed lower seed dormancy,while scavenging CO,or the mutant with lower CO level,presented strong primary seed dormancy,genetic analysis showed that DOG1 was targeted by CO signal and was prerequisite for CO-dependent seed dormancy ***,we found CO signal activated the expression of ERF/AP2 transcriptional factor ERF12,as well as enhanced the binding of ERF12 to the promoter of DOG1,ultimately transcriptional silence of DOG1 expression to break primary seed *** CO signal reduced the histone acetylation level at the chromatin of DOG1 locus to suppress its ***,our results revealed that CO acts as the novel regulator to suppress DOG1 expression and efficiently break primary seed dormancy through activating the negative factor ERF12.

关键词： Arabidopsis DOG1 carbon monoxide primary seeds germination

Understanding the dehydrogenation mechanism over iron nanoparticles catalysts based on density functional theory

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Chinese Chemical Letters 2021年第1期32卷 286-290页

作者： wenjuan yang Yating Zhu Junjun Li Zheng Chen Farhat Nosheen Qitao Zhang Zhicheng Zhang SZU-NUS Collaborative Innovation Center for Optoelectronic Science£/Technology International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of EducationInstitute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060China Tianjin Key Laboratory of Molecular Optoelectronic Sciences Department of ChemistrySchool of ScienceTianjin University&Collaborative Innovation Center of Chemical Science and EngineeringTianjin 300072China Hanshan Normal University Chaozhou 521041China Key Laboratory of Functional Molecular Solids Ministry of EducationAnhui Key Laboratory of Molecule-Based MaterialsCollege of Chemistry and Materials ScienceAnhui Normal UniversityWuhu 241000China Department of Chemistry Division of Science&TechnologyUniversity of EducationLahorePakistan

The conversion of chemical feedstock materials into high value-added products accompanied with dehydrogenation is of great value in the chemical ***,the catalytic dehydrogenation reaction is inhibited by a limited number of expensive noble metal catalysts and lacks understanding of dehydrogenation ***,we report the use of heterogeneous non-noble metal iron nanoparticles(NPs) incorporated mesoporous nitrogen-doped carbon to investigate the dehydrogenation mechanism based on experiment observation and density functional theory(DFT) *** NPs catalyst displays excellent performance in the dehydrogenation of 1,2,3,4-tetrahydroquinoline(THQ)with 100% selectivity and 100% conversion for 10-12 h at room *** calculated adsorption energy implies that THQ prefers to adsorb on Fe NPs as compared with absence of Fe *** is more,the energy barrier of transition state is relatively low,illustrating the dehydrogenation is *** work provides an atomic scale mechanism guidance for the catalytic dehydrogenation reaction and points out the direction for the design of new catalysts.

关键词： Dehydrogenation mechanism Fe nanoparticles Density functional theory Transition states 1,2,3,4-Tetrahydroquinoline Theoretical calculations

Synchrotron Radiation Topographic Study on the Dislocations in Lithium Tetraborate Crystal

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Chinese Physics Letters 1991年第2期8卷 78-81页

作者： yang Ping JIANG Shusheng WANG Luchun ZHAO Jiyong JIANG Xiaoming JIANG Jianhua CHAO Zhiyu TIAN Yulian XIAN Dingchang yang wenjuan yang Yao Laboratory of Solid State Microstructures Nanjing UniversityNanjing 210008 Synchrotron Radiation Laboratory IHEPBeijing 100039 Centre of Materials Analysis Nanjing UniversityNanjing 210008

The dislocations in lithium tetraborate crystal have been investigated by means of synchrotron radiation white beam topography in BSRL(Beijing Synchrotron Radiation Laboratory).The Burgers'vectors of these dislocation... 详细信息

关键词： borate Crystal Lithium