检索结果-内蒙古大学图书馆

Low-Temperature Methanolysis of Polycarbonate over Solid Base Sodium Aluminate

Langmuir 2024年第10期40卷 5338-5347页

作者： Krisbiantoro, Philip Anggo Sato, Miyu Lin, Tzu-Ming Chang, Yu-Chia Peng, Tzu-Yun Wu, Yun-Chih Liao, Weisheng Kamiya, Yuichi Otomo, Ryoichi Wu, Kevin C.-W. Molecular Science and Technology Program Taiwan International Graduate Program Academia Sinica Taipei11529 Taiwan International Graduate Program of Molecular Science and Technology National Taiwan University Taipei10617 Taiwan Department of Chemical Engineering College of Engineering National Taiwan University Taipei10617 Taiwan Graduate School of Environmental Science Hokkaido University Nishi 5 Kita 10 Sapporo060-0810 Japan Faculty of Environmental Earth Science Hokkaido University Nishi 5 Kita 10 Sapporo060-0810 Japan Center of Atomic Initiative for New Materials National Taiwan University Taipei10617 Taiwan Department of Chemical Engineering and Materials Science Yuan Ze University Taoyuan320 Taiwan

Herein, a low-cost and readily available sodium aluminate (NaAlO2) was used as a solid base catalyst for the depolymerization of polycarbonate (PC) via methanolysis in the presence of tetrahydrofuran (THF) as a solvent. NaAlO2 was highly active for the reaction, and the performance was comparable to that of soluble strong base SrO and much higher than those of MgO and CaO. By the reaction over the catalyst, a highly pure and crystalline bisphenol A (BPA) was obtained. Among tested organic solvents, THF was the best in aiding PC methanolysis over NaAlO2 due to the polarity similar to PC according to Hansen solubility parameters (HSPs). At 60 °C, 98.1% PC conversion and 96.8% BPA yield were achieved within just 2 h. NaAlO2 was reusable without any severe catalyst deactivation in at least four runs. The mechanistic study revealed that the reaction proceeded via the methoxide pathway, with THF aiding the dissolution of PC. The reaction over NaAlO2 possessed a low apparent activation energy (Ea) of 75.1 kJ mol-1, which is the lowest ever reported so far for the reaction over solid catalysts. © 2024 The Authors. Published by American chemical Society.

关键词： Sodium Aluminate

来源：评论

学校读者我要写书评

暂无评论

Integrating Sulfido Ligands into Thiolate-Gold(I) Clusters via Competing Bonding

引用

CCS Chemistry 2025年第4期7卷 1100-1111页

作者： Zhucheng Yang Ziyi Chen Bo Li Ruixuan Zhang Yitao Cao De-en Jiang Qiaofeng Yao Huiting Shan Tiankai Chen Peng Zhang Jianping Xie Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityFuzhou 350207 Department of Chemical and Biomolecular Engineering National University of SingaporeSingapore 117585 Department of Chemistry Dalhousie UniversityHalifaxNS B3H 4R2 Department of Chemical and Biomolecular Engineering Vanderbilt UniversityNashvilleTN 37235 National and Local Joint Engineering Research Center of MPTES in High Energy and Safety LIBs Engineering Research Center of MTEES(Ministry of Education)and Key Laboratory of ETESPG(GHEI)South China Normal UniversityGuangzhou 510006 Key Laboratory of Organic Integrated Circuits Ministry of Education&Tianjin Key Laboratory of Molecular Optoelectronic SciencesDepartment of ChemistrySchool of ScienceTianjin UniversityTianjin 300072 Collaborative Innovation Center of Chemical Science and Engineering(Tianjin) Tianjin 300072 School of Science and Engineering The Chinese University of Hong Kong(Shenzhen)Shenzhen 518172

Competition at metal-ligand interfaces has long been recognized as a pivotal process in constructing multiscale nanostructures,wherein there is a delicate balance of coordination that yields novel structures and ***,elucidating the underlying mechanisms and establishing design principles remain ***,we strategically introduce competition between Au(I)-thiolates and Na2S(inorganic sulfur),leading to the synthesis of an organic-inorganic hybrid-sulfur-containing cluster[Au_(22)(SR)_(17)S_(3)]−(SR=thiolate).X-ray absorption spectroscopy and tandem mass spectrometry revealed its structural features,where the gold sulfido cores(inorganic sulfide)were protected by gold-thiolates(organosulfur).More importantly,real-time electrospray ionization-mass spectrometry elucidated its formation process as a three-stage mechanism involving seed incubation,associative growth,and *** the extension of this approach,the nuclearity of gold sulfido clusters became tunable(e.g.,[Au_(22)(SR)_(14)S_(5)]^(2−)).This work not only introduces a novel category of atomically precise gold nanomaterials with appealing highlyemissive properties but also provides insights into the design of coordination competition for precise composition engineering of metal nanomaterials.

关键词： gold sulfido clusters atomically precise metal nanoclusters Au-S bond competing bonding mechanism electrospray ionization-mass spectrometry

来源：评论

学校读者我要写书评

暂无评论

A Solvent-Free Covalent Organic Framework Single-Ion Conductor Based on Ion-Dipole Interaction for All-Solid-State Lithium Organic Batteries

引用

Nano-Micro Letters 2024年第12期16卷 189-200页

作者： Zhongping Li Kyeong-Seok Oh Jeong-Min Seo Wenliang Qin Soohyoung Lee Lipeng Zhai Changqing Li Jong-Beom Baek Sang-Young Lee Department of Chemical and Biomolecular Engineering Yonsei University50 Yonsei-RoSeodaemun-GuSeoul 03722Republic of Korea School of Energy and Chemical Engineering Ulsan National Institute of Science and Technology(UNIST)50 UNIST-GilEonyang-EupUlju-GunUlsan 44919Republic of Korea Henan Key Laboratory of Functional Salt Materials Center for Advanced Materials ResearchZhongyuan University of TechnologyZhengzhou 450007People’s Republic of China Department of Battery Conflation Engineering Yonsei University50Yonsei-RoSeodaemun-GuSeoul 03772Republic of Korea Department of Battery Engineering Yonsei University50Yonsei-RoSeodaemun-GuSeoul 03772Republic of Korea

Single-ion conductors based on covalent organic frameworks(COFs)have garnered attention as a potential alternative to currently prevalent inorganic ion conductors owing to their structural uniqueness and chemical ***,the sluggish Li+conduction has hindered their practical ***,we present a class of solvent-free COF single-ion conductors(Li-COF@P)based on weak ion-dipole interaction as opposed to traditional strong ion-ion *** ion(Li+from the COF)-dipole(oxygen from poly(ethylene glycol)diacrylate embedded in the COF pores)interaction in the Li-COF@P promotes ion dissociation and Li+migration via directional ionic *** by this single-ion transport behavior,the Li-COF@P enables reversible Li plating/stripping on Li-metal electrodes and stable cycling performance(88.3%after 2000 cycles)in organic batteries(Li metal anode||5,5’-dimethyl-2,2’-bis-p-benzoquinone(Me2BBQ)cathode)under ambient operating conditions,highlighting the electrochemical viability of the Li-COF@P for all-solid-state organic batteries.

关键词： Solid organic single-ion conductors Solvent-free covalent organic frameworks All-solid-state Li organic batteries Ion-dipole interaction Pore functionalization

来源：评论

学校读者我要写书评

暂无评论

Effect of silicon carbide-based iron catalyst on reactor optimization for non-oxidative direct conversion of methane

引用

Journal of Energy Chemistry 2023年第6期81卷 519-532,I0012页

作者： Eun-hae Sim Sung Woo Lee Jin Ju Lee Seung Ju Han Jung Ho Shin Gracia Lee Sungrok Ko Kwan-Young Lee Yong Tae Kim C1 Gas&Carbon Convergent Research Center Korea Research Institute of Chemical TechnologyDaejeon 34114Republic of Korea Department of Chemical and Biological Engineering Korea University145 Anam-roSeoul 02841Republic of Korea Department of Chemical and Biomolecular Engineering Yonsei University50 Yonsei-roSeoul 03722Republic of Korea Chemical Data-Driven Research Center Korea Research Institute of Chemical TechnologyDaejeon 34114Republic of Korea Prospective Tech.Exploring Section Basic Chemical R&D centerLottechemical Corp.Daejeon 34059Republic of Korea Department of Advanced Materials and Chemical Engineering University of Science and Technology(UST)Gajeong-dongYuseongDaejeon 34113Republic of Korea

The conversion of methane to olefins,aromatics,and hydrogen(MTOAH)can be used to stably obtain hydrocarbons when the effect of the catalytic surface is optimized from the reaction engineering *** this study,Fe/Si C catalysts were packed into a quartz tube *** catalytic surfaces of Si C and the impregnated Fe species decreased the apparent activation energies(E_a)of methane consumption in the blank reactor between 965 and 1020℃.Consequently,the hydrocarbon yield increased by 2.4times at 1020℃.Based on the model reactions of ethane,ethylene,and acetylene mixed with hydrogen in the range of 500-1020℃,an excess amount of Fe in the reactor favored the C-C coupling reaction over the selective hydrogenation of acetylene;consequently,coke formation was favored over the hydrogenation *** gas-phase reactions and catalyst properties were optimized to increase hydrocarbon yields while reducing coke *** 0.2Fe catalyst-packed reactor(0.26 wt%Fe)resulted in a hydrocarbon yield of 7.1%and a coke selectivity of<2%when the ratio of the void space of the postcatalyst zone to the catalyst space was adjusted to be≥*** on these findings,the facile approach of decoupling the reaction zone between the catalyst surface and the gas-phase reaction can provide insights into catalytic reactor design,thereby facilitating the scale-up from the laboratory to the commercial scale.

关键词： Non-oxidative methane conversion Ethylene Aromatic Methane pyrolysis Fe/SiC Coke resistance Catalytic reactor

来源：评论

学校读者我要写书评

暂无评论

Artificial photosynthesis for high-value-added chemicals:Old material,new opportunity

引用

Carbon Energy 2022年第1期4卷 21-44页

作者： Sungsoon Kim Kwang Hee Kim Cheoulwoo Oh Kan Zhang Jong Hyeok Park Department of Chemical and Biomolecular Engineering Yonsei UniversitySeoulRepublic of Korea Institute of Optoelectronics&Nanomaterials Nanjing University of Science and TechnologyNanjingChina

Solar energy utilization has drawn attention due to ever-increasing environmental and energy ***(PEC)and photocatalytic(PC)water splitting for hydrogen production,which is the most popular and well-established solar-to-chemical conversion process,has been studied thoroughly to date but is now facing limitations related to low conversion *** resolve this issue,research in PEC cells or photocatalysts has recently aimed to produce alternative value-added chemicals by modifying their redox reactions,which potentially enables high economic reward to compensate for the low ***,various kinds of redox reactions that decouple classic water splitting reactions to produce value-added chemicals via PEC and PC processes are *** coupling of CO_(2) reduction,O_(2) reduction and organic synthesis with either water oxidation or water reduction is comprehensively discussed from the perspective of basic fundamental and product selectivity in terms of the band structure of materials,cocatalyst design,and thermodynamics and kinetics of the *** the review,future challenges and opportunities are suggested with respect to the redesigned artificial synthesis,which might be an alternative development for the commercialization of PEC or PC value-added chemical production technologies in the near future.

关键词： artificial photosynthesis photocatalysts photoelectrochemical cells redox reactions value-added chemical production

来源：评论

学校读者我要写书评

暂无评论

Chevrel phase: A review of its crystal structure and electrochemical properties

引用

Progress in Natural science:Materials International 2023年第1期33卷 8-15页

作者： Meng Liu Guocheng Lv Tianming Liu Hao Liu Lingchang Kong Lintao Tian Wenxiu Rao Yuxin Li Libing Liao Juchen Guo Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral Materials School of Materials Science and Technology China University of Geosciences(Beijing) School of Science China University of Geosciences Materials Science and Engineering Program University of California-Riverside Department of Chemical and Environmental Engineering University of California – Riverside

Chevrel phase compounds have attracted increasing attention as electrochemical energy storage materials and electro-catalysts. Benefiting from their unique crystal structure, Chevrel phase compounds can not only function as the host structures for reversible intercalation of a broad range of cations, but also exhibit high catalytic activity in electrochemical reduction reactions. Here we provide an overview of recent progress in the development of Chevrel phase materials including new understanding of structural features, synthetic methods, and electrochemical properties. A brief conclusion and perspectives on the future development of Chevrel phase materials are also provided.

关键词： Chevrel phase Electrochemical properties Energy storage Electro-catalysis

来源：评论

学校读者我要写书评

暂无评论

Hollow structured Cu@ZrO_(2) derived from Zr-MOF for selective hydrogenation of CO_(2) to methanol

引用

Journal of Energy Chemistry 2022年第8期31卷 277-287,I0008页

作者： Xiaoyu Han Maoshuai Li Xiao Chang Ziwen Hao Jiyi Chen Yutong Pan Sibudjing Kawi Xinbin Ma Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityBinhai New CityFuzhou 350207FujianChina Key Laboratory for Green Chemical Technology of Ministry of Education Collaborative Innovation Center of Chemical Science and EngineeringSchool of Chemical Engineering and TechnologyTianjin UniversityTianjin 300350China Department of Chemical and Biomolecular Engineering National University of SingaporeSingapore 117585Singapore

The development of a highly efficient catalyst for CO_(2) activation and selective conversion to methanol is critical to address the issues associated with the high thermal stability of CO_(2) and controllable synthesis of ***-based catalysts have been widely studied because of the low cost and excellent performance in mild ***,the improvement of catalytic activity and selectivity remains ***,we prepared hollow Cu@ZrO_(2) catalysts through pyrolysis of Cu-loaded Zr-MOF for CO_(2) hydrogenation to ***-temperature pyrolysis generated highly dispersed Cu nanoparticles with balanced Cu^(0)/Cu^(+)sites,larger amounts of surface basic sites and abundant Cu-ZrO_(2) interface in the hollow structure,contributing to enhanced catalytic capacity for adsorption/activation of CO_(2) and selective hydrogenation to *** situ Fourier Transform Infrared Spectroscopy revealed the methanol formation followed the formate-intermediated *** work would provide a guideline for the design of high-performance catalysts and the understanding of the mechanism and active sites for CO_(2) hydrogenation to methanol.

关键词： CO_(2)conversion Methanol synthesis Cu-based catalyst MOF808 Hollow structure

来源：评论

学校读者我要写书评

暂无评论

Molecular engineering of Benzobisoxazole-Based Conjugated Polymers for High-Performance Organic Photodetectors and Fingerprint Image Sensors

引用

Energy & Environmental Materials 2025年第1期8卷 151-163页

作者： Cheol Shin WonJo Jeong Ezgi Darici Lee Jong Baek Park Hyungju Ahn Seyeon Baek Myeong In Kim Dae Sung Chung Kang-Il Seo In Hwan Jung Department of Organic and Nano Engineering and Human-Tech Convergence ProgramHanyang University222 Wangsimni-roSeongdong-guSeoul 04763Korea CLAP Co. Ltd.1342Seongnam-daeroSujeong-guSeongnam-siGyeonggido 13120Korea Pohang Accelerator Laboratory POSTECHPohang 37673Korea Department of Chemical Engineering Pohang University of Science and Technology(POSTECH)Pohang 37673Korea

Various novel conjugated polymers(CPs)have been developed for organic photodetectors(OPDs),but their application to practical image sensors such as X-ray,R/G/B,and fingerprint sensors is *** this article,we report the entire process from the synthesis and molecular engineering of novel CPs to the development of OPDs and fingerprint image *** synthesized six benzo[1,2-d:4,5-d’]bis(oxazole)(BBO)-based CPs by modifying the alkyl side chains of the *** relationships between the molecular structure and the OPD performance were revealed,and increasing the number of linear octyl side chains on the conjugated backbone was the best way to improve Jph and reduce Jd in the *** optimized CP demonstrated promising OPD performance with a responsivity(R)of 0.22 A/W,specific detectivity(D^(*))of 1.05×10^(13)Jones at a bias of-1 V,rising/falling response time of 2.9/6.9μs,and cut-off frequency(f_(-3dB))of 134 kHz under collimated 530 nm LED ***,a fingerprint image sensor was fabricated by stacking the POTB1-based OPD layer on the organic thin-film transistors(318 ppi).The image contrast caused by the valleys and ridges in the fingerprints was obtained as a digital signal.

关键词： alkyl side chain engineering fingerprint image sensor on/off ratio organic photodetector specific detectivity

来源：评论

学校读者我要写书评

暂无评论

Selective synthesis of monodisperse bimetallic nickel-cobalt phosphates with different nanoarchitectures for battery-like supercapacitors

引用

Journal of Materials Chemistry A 2024年第23期12卷 14045-14058页

作者： Wulan Septiani, Ni Luh Chowdhury, Silvia Hardiansyah, Andri Rinawati, Mia Yeh, Min-Hsin Nara, Hiroki Yamauchi, Yusuke Kaneti, Yusuf Valentino Yuliarto, Brian Kawasan Puspiptek Serpong South Tangerang15314 Indonesia Bandung40132 Indonesia The University of Queensland BrisbaneQLD4072 Australia Department of Chemical Engineering National Taiwan University of Science and Technology Taipei10607 Taiwan Waseda Research Institute for Science and Engineering Waseda University 3-4-1 Okubo Shinjuku Tokyo169-8555 Japan Department of Materials Process Engineering Graduate School of Engineering Nagoya University Nagoya464-8603 Japan Department of Chemical and Biomolecular Engineering Yonsei University 50 Yonsei-ro Seodaemun-gu Seoul03722 Korea Republic of Bandung40132 Indonesia

This work reports the fabrication of monodisperse nickel-cobalt phosphate particles with varying structures via the solvothermal reaction of nickel-cobalt glycerate spheres with triethyl phosphate (TEP) in different solvents followed by subsequent calcination in air at 600 °C. The choice of solvent affects the morphology of the resulting nickel-cobalt phosphate precursor obtained from the solvothermal reaction. It is found that alcohol-based solvents (pure ethanol and ethanol/butanol mixture) favour the formation of monodisperse plate-like particles, while the use of a water/ethanol mixture promotes the generation of rod-like particles. The optimized amorphous nickel-cobalt phosphate sample prepared using pure ethanol followed by calcination in air at 600 °C (E-NiCo-TEP-600) exhibits a battery-like behaviour with a high specific capacity of 620 C g−1 (specific capacitance of 1550 F g−1) in 6.0 M KOH at a current density of 2 A g−1. Furthermore, the asymmetric supercapacitor (ASC) fabricated using E-NiCo-TEP-600 as the cathode and commercial activated carbon (AC) as the anode (E-NiCo-TEP-600//AC ASC) displays a maximum energy density of 45 W h kg−1 at a power density of 750 W kg−1. The stability test reveals the good long-term stability of this ASC with a high capacitance retention of ∼100% after 5000 cycles at a high current density of 10 A g−1. The porous nature along with the high structural disorder and abundant mesopores in the amorphous nickel-cobalt phosphate plate-like particles (E-NiCo-TEP-600) can promote faster diffusion of electrolyte ions and better electrolyte ion penetration, leading to a higher electrochemical performance. These results indicate the promising potential of porous amorphous bimetallic phosphates for supercapacitors. © 2024 The Royal Society of Chemistry.

关键词： Cobalt compounds

来源：评论

学校读者我要写书评

暂无评论

Diluent decomposition-assisted formation of Li F-rich solid-electrolyte interfaces enables high-energy Li-metal batteries

引用

Journal of Energy Chemistry 2023年第3期78卷 71-79,I0003页

作者： Junbo Zhang Haikuo Zhang Ruhong Li Ling Lv Di Lu Shuoqing Zhang Xuezhang Xiao Shujiang Geng Fuhui Wang Tao Deng Lixin Chen Xiulin Fan Shenyang National Laboratory for Materials Science Northeastern UniversityShenyang 110819LiaoningChina State Key Laboratory of Silicon Materials School of Materials Science and EngineeringZhejiang UniversityHangzhou 310027ZhejiangChina Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province Hangzhou 310013ZhejiangChina Department of Chemical and Biomolecular Engineering University of MarylandCollege Park 20742MDUSA

Passivation by the inorganic-rich solid electrolyte interphase(SEI),especially the LiF-rich SEI,is highly desirable to guarantee the durable lifespan of Li metal batteries(LMBs).Here,we report a diluent with the capability to facilitate the formation of LiF-rich SEI while avoiding the excess consumption of Li *** to most of reported inert diluents,heptafluoro-l-methoxypropane(HM) is firstly demonstrated to cooperate with the decomposition of anions to generate LiF-rich SEI via releasing Fcontaining species near Li *** designed electrolyte consisting of 1.8 M LiFSI in the mixture of1,2-dimethoxyethane(DME)/HM(2:1 by vol.) achieves excellent compatibility with both Li metal anodes(Coulombic efficiency~99.8%) and high-voltage cathodes(4.4 V LiNi_(0.8)Mn_(0.1)Co_(0.1)O_(2)(NMC811) and 4.5 V LiCoO_(2)(LCO) vs Li^(+)/Li).The 4.4 V Li(20μm)‖NMC811(2.5 mA h cm^(-2)) and 4.5 V Li(20μm)‖LCO(2.5 mA h cm^(-2)) cells achieve capacity retentions of 80% over 560 cycles and 80% over 505 cycles,***,the anode-free pouch cell delivers an energy density of~293 W h kg^(-1)initially and retains 70% of capacity after 100 deep *** work highlights the critical impact of diluent on the SEI formation,and opens up a new direction for designing desirable interfacial chemistries to enable high-performance LMBs.

关键词： Diluent Solvation structure LiF-rich SEI Li metal batteries Localized high-concentration electrolyte

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：