检索结果-内蒙古大学图书馆

Crystal-phase-controlled PtSn intermetallic nanowires for efficient methanol oxidation

science China Chemistry 2024年第12期67卷 4142-4148页

作者： Siyu Cao Mengfan Li Zihan Guo Li Gong Yangfan Lu Wenhua Zhang Yu Ni Lei Gao Chao Ma Hongwen Huang College of Materials Science and Engineering Changsha University of Science and TechnologyChangsha 410114China College of Materials Science and Engineering Hunan UniversityChangsha 410082China Zhejiang Provincial Engineering Research Center of Oxide Semiconductors for Environmental and Optoelectronic Applications Institute of WenzhouZhejiang UniversityWenzhou 325006China State Key Laboratory of Silicon Materials School of Materials Science and EngineeringZhejiang UniversityHangzhou 310027China Department of Chemical Physics University of Science and Technology of ChinaHefei 230026China China Power Engineering Consulting Group Co. LTDBeijing 100120China Shenzhen Research Institute of Hunan University Shenzhen 518055China

Developing highly efficient Pt-based methanol oxidation reaction(MOR)catalysts is pivotal for direct methanol fuel *** engineering of nanomaterials offers a promising strategy to improve their catalytic performance,yet achieving phase modulation in one-dimensional nanowires(NWs)remains a great ***,we report a facile and one-pot synthesis approach for the crystal-phase-controlled Pt-Sn intermetallic nanowires(NWs),realizing the crystal-phases regulation of face-centered cubic Pt_(3)Sn intermetallic NWs(FCC-Pt_(3)Sn INTNWs)and hexagonal close-packed Pt Sn intermetallic NWs(HCP-PtSn INTNWs)by adjusting the amounts of Sn ***,the FCC-Pt_(3)Sn INTNWs exhibit high mass and specific activities of 6.4 A mg_(Pt)^(-1)and 11.8 mA cm^(-2),respectively,surpassing its counterparts,the HCP-PtSn INTNWs and commercial Pt/C *** a 10,000 s durability test,the FCC-Pt_(3)Sn INTNWs still maintain a mass activity of 5.6 A mg_(Pt)^(-1),which is 24.3 times higher than that of commercial Pt/C *** dramatic enhancement of MOR performance is primarily attributed to the phasecontrolled structure and accelerated removal of CO intermediates(CO*).Theoretical calculations and CO stripping experiments demonstrate that the FCC-Pt_(3)Sn INTNWs lower the energy barrier for converting CO*into COOH*by reducing CO*binding and enhancing OH adsorption,thus significantly improving the MOR activity,CO tolerance,and stability.

关键词： Pt-Sn intermetallic nanowires crystal phase methanol oxidation reaction anti-CO poisoning

来源：评论

学校读者我要写书评

暂无评论

Porphyrin-Grafted Poly(ethylene terephthalate) as a Reusable and Highly Selective Colorimetric Probe for Mercuric Ion Contaminants in Aqueous Samples

引用

ACS Applied materials and Interfaces 2024年第30期16卷 39195-39205页

作者： Atayde, Eduardo C. Takenaka, Yasumasa Abe, Hideki Wu, Ming-Rou Wu, Kevin C.-W. Molecular Science and Technology Program Taiwan International Graduate Program Academia Sinica Department of Chemistry National Tsing Hua University Department of Chemical Engineering National Taiwan University Bioplastic Research Team RIKEN Center for Sustainable Resource Science Department of Chemical Engineering and Materials Science Yuan Ze University Department of Chemical Engineering Chung Yuan Christian University

Heavy metals are the most hazardous water pollutants, with severe health and environmental consequences. Among these, mercuric (Hg2+) ions are known to cause detrimental health issues in both humans and aquatic life. ... 详细信息

Heavy metals are the most hazardous water pollutants, with severe health and environmental consequences. Among these, mercuric (Hg²⁺) ions are known to cause detrimental health issues in both humans and aquatic life. Due to this, several analytical techniques have been devised to detect and quantify the amount of this ion. However, most of these require advanced instrumentation, prolonged analysis time, and sample preparation. In this study, a low-cost and highly reusable colorimetric probe was developed by grafting porphyrin to poly(ethylene terephthalate) sheets using an oxazoline polymer as covalent adhesive. Upon exposure to trace amounts of Hg²⁺ in solution, the fabricated material visually transitioned from faint brownish pink to green by the complexation mechanism. Additionally, the transparency of this probe allowed the quantitative spectrophotometric determination of the Hg²⁺ concentration in aqueous samples. It was also shown that the material is highly stable, which can be reused for more than 50 times without significant decline in its performance, hence, making it suitable for the onsite monitoring of mercuric ion contamination in different bodies of water. © 2024 The Authors. Published by American chemical Society.

关键词： colorimetric probe mercuric ion oxazoline PET porphyrin

来源：评论

学校读者我要写书评

暂无评论

Intermittent oxidation kinetics and metal/oxide interfacial undulation

引用

Physical Review B 2024年第8期110卷 085402-085402页

作者： Dongxiang Wu Xianhu Sun Judith C. Yang Guangwen Zhou Department of Mechanical Engineering & Materials Science and Engineering Program Department of Chemical and Petroleum Engineering

The phenomenon of oxygen adsorption induced surface restructuring is widespread across various metal-oxygen systems, yet its impact on initiating bulk oxide formation remains largely unexplored. Through in situ atomic-resolution electron microscopy observations of surface oxidation of Cu(110) and Cu85Au15(110), we unveil intermittent oxide-film growth modulated by oxygen-induced surface restructuring. This modulation is evidenced by repeated pinning of the Cu2O growth front at isolated Cu columns of the c(6×2)-O reconstruction, owing to required long-range diffusion of Cu and O atoms to the Cu2O growth front. We reveal that Cu vacancies, generated at the Cu2O growth front, are injected into the Cu2O/Cu interface, inducing hill and valley undulation of the Cu2O film. In contrast, atomic vacancies produced during the Cu85Au15(110) oxidation preferentially migrate into interfaces between Au-rich and Au-poor regions in the bulk, resulting in a flat and adherent Cu2O film. These findings demonstrate the critical role of oxygen-induced surface restructuring in modulating oxide film growth kinetics and the manipulability of the fate of injected vacancies by alloying, thereby offering insights applicable to a broader range of metal-oxygen systems for fine-tuning oxidation kinetics and enhancing oxide/metal interfacial adhesion.

关键词： Surface & interfacial phenomena Surface reconstruction Surface growth Density functional theory Transmission electron microscopy

来源：评论

学校读者我要写书评

暂无评论

Construction interlayer structure of hydrated vanadium oxides with tunable P-band center of oxygen towards enhanced aqueous Zn-ion batteries

Advanced Powder Materials

引用

Advanced Powder materials 2024年第2期3卷 9-16页

作者： Ziyi Feng Yunlong Zhang Zhanming Gao Dida Hu Hanmei Jiang Tao Hu Changgong Meng Yifu Zhang School of Chemistry Dalian University of TechnologyDalian 116024China Department of Materials Science and Engineering National University of SingaporeSingapore 117574Singapore College of Environmental and Chemical Engineering Dalian UniversityDalian116622China

Layered materials with adjustable framework,as the most potential cathode materials for aqueous rechargeable zinc ion batterie,have high capacity,permit of rapid ion diffusion,and charge transfer *** studies have widely investigated their preparation and storage mechanism,but the intrinsic relationship between the structural design of layered cathode materials and electrochemical performance has not been well *** this work,based on the first principles calculations and experiments,a crucial strategy of pre-intercalated metalions in vanadium oxide interlayer with administrable p-band center(ε_(p))of O is explored to enhance Zn^(2+)*** regulation of the degree of covalent bond and the average charge of O atoms varies the binding energy between Zn^(2+)and O,thus affecting the intercalation/de-intercalation of Zn2þ.The present study demonstrates thatεp of O can be used as an important indicator to boost Zn2þstorage,which provides a new concept toward the controlled design and application of layered materials.

关键词： Layered materials P-band center(ε_(p))of O Metal-ion intercalation Zn-ion storage

来源：评论

学校读者我要写书评

暂无评论

The purification of dominant spoilage fungi on Lonicera Caeruleum and the inhibitory effects of composite essential oils against these fungi

引用

Food Bioscience 2023年第3期53卷 2918-2928页

作者： Shasha Jiang Lu Wang Dehai Li Changyan Sun College of Life Science Northeast Forestry University150040HarbinHeilongjiangChina Department of Environmental Engineering School of Materials Science and Chemical EngineeringHarbin University of Science and Technology150040HarbinHeilongjiangChina

The fungal inhibitory and preservative effects of essential oils(EOs)on the dominant spoilage fungi of blue honeysuckle were ***,the dominant spoilage fungi(CW1,CW3,and W53)were isolated from naturally infected blue honeysuckle and identified through morphological features,inoculation study,and rDNA-ITS analysis were matched to Alternaria alternata,Metuloidea reniformis,and Rhizopus microsporus,***,the filter paper method determined the sensitivity of EOs to the dominant spoilage fungi,and four kinds with better antifungal effects were screened *** or three combinations of four EOs were evaluated using a checkerboard analysis *** fractional inhibitory concentration index(FICI)was used to assess the in-teractions between the *** combinations of cinnamon/oregano,cinnamon/clove,oregano/clove,and cinnamon/oregano/clove showed synergistic effects(FICI≤0.5).The best three-oil combination had a volume ratio of 31:8:8 compared to a single ***,in vivo,experiments showed that combining triple groups of EOs could prevent the spoilage of postharvest *** with the control group,the triple groups of essential oil combination maintained the best color,quality,and flavor of blue honeysuckle *** the same time,the spoilage rate and the weight loss rate were reduced by 38.50%and 40.71%,*** spoilage time to 3-5 days and the preservation effect of blue honeysuckle was extended to 16 ***,this study provides a theoretical basis for substituting chemical preservatives and highlights the po-tential of using complex EOs to prolong the freshness of blue honeysuckle.

关键词： Lonicera caerulea L. Postharvest Dominant spoilage fungi Essential oils combination Synergistic antifungal

来源：评论

学校读者我要写书评

暂无评论

A novel material for passive NO_(x) adsorber:Ce-based BEA zeolite

引用

Journal of Rare Earths 2023年第8期41卷 1163-1170,I0002页

作者： Yan Wu Jun Wang Zexiang Chen Yi Zhu Minghui Yu Chen Wang Yanping Zhai Jianqiang Wang Gurong Shen Meiqing Shen School of Chemical Engineering and Technology Tianjin UniversityTianjin 300350China National Rare Earth Catalysis Research Institute Dongying 257000China Department of Environmental Engineering and Technology China Institute for Radiation ProtectionTaiyuan 030006China School of Materials Science and Engineering Tianjin UniversityTianjin 300350China School of Environmental and Safety Engineering North University of ChinaTaiyuan 030051China Collaborative Innovation Center of Chemical Science and Engineering(Tianjin) Tianjin 300350China

Passive NO_(x) adsorbers(PNAs)were proposed to address the NO_(x) emissions during the cold start *** we show a novel Ce-based BEA zeolite,as a noble-metal-free passive NO_(x)*** NO_(x) adsorption capacity of Ce/BEA reaches 36μmol/g in the feed gas close to realistic exhaust conditions,and the NO_(x) desorption temperature,which is around 290℃,is ideal for diesel exhaust after-treatment ***/BEA also behaves notable stability of high temperature CO exposure *** characterizations were performed to explore the NO_(x) adsorption chemistry of Ce/*** Ce(Ⅳ)species in the BEA zeolite serves as the active center for NO_(x) *** bidentate nitrate species is responsible for the observed NO_(x) storage capacity,and the active oxygen around Ce(Ⅳ)plays a critical role in its *** the significantly better cost efficiency of Ce compared to Pd,Ce/BEA presents an enormous potential for the PNA applications and provides a novel formulation for the noblemetal choice of PNA materials.

关键词： Passive NO_(x)adsorbers Ce/BEA Non-noble-metal Cold start Rare earths

来源：评论

学校读者我要写书评

暂无评论

Low-Temperature Methanolysis of Polycarbonate over Solid Base Sodium Aluminate

引用

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

Tuning electronic properties of cobalt phthalocyanines for oxygen reduction and evolution reactions

引用

science China Chemistry 2024年第1期67卷 398-407页

作者： Jianlin Jiang Zhen Liu Shuaijun Pan Xinnian Xia Bing Qin Yang Hu Xuxu Wang Jiamin Lan Yu Gu Encai Ou Weijian Xu Joseph J.Richardson Rui Guo SINOPEC Research Institute of Petroleum Processing Co. Ltd.Beijing 100083China College of Chemistry and Chemical Engineering Hunan UniversityChangsha 410082China College of Chemistry and Materials Science Hunan Agricultural UniversityChangsha 410128China Department of Chemical Engineering The University of MelbourneParkville 3010Australia College of Environmental Science and Engineering Hunan UniversityChangsha 410082China School of Engineering RMIT UniversityMelbourneVictoria 3001Australia

Metal–phthalocyanines are a class of catalytically active materials promising in energy conversion and storage fields(e.g.,electrocatalysis).However,understanding and controlling the electrochemical properties in metal-phthalocyanine systems is ***,we elucidate the electrocatalytic origins of a series of cobalt-phthalocyanine molecular catalysts and finetune their electronic properties at the atomic level,both experimentally and *** interactions between the cobalt center and the local coordination environment are regulated by introducing either electron-donating or electron-withdrawing groups on the phthalocyanine ligand,and the spin-orbit splitting of cobalt is increased by~0.15 eV compared with the nonsubstituted ***,the aminated cobalt phthalocyanine-based electrocatalysts exhibit low free energies in the ratedetermining steps of the oxygen reduction(-1.68 eV)and oxygen evolution reactions(0.37 eV).This contributes to the high electrocatalytic activity(e.g.,a halfwave potential of 0.84 V and an overpotential of 0.30 V at 10 mAcm^(-2)),featuring a high selectivity of a four-electron pathway(i.e.,a negligible by-product of hydrogen peroxide).These catalysts also exhibit exceptional kinetic current density(Tafel slope of 100 mV dec^(-1))in oxygen reduction reactions,in addition to a superior power density(158 mWcm^(-2))and a high cycling stability(>1,300 cycles)in Zn-air batteries,outperforming the commercial Pt/C and/or RuO2counterparts.

关键词： interfacial wettability molecular catalysts carbon nanotubes density functional theory electrochemistry

来源：评论

学校读者我要写书评

暂无评论

Application of ceria materials modified by oxygen vacancies:In photocatalytic process

引用

Journal of Rare Earths 2025年第3期43卷 417-429,I0001页

作者： Peng Wang Fang Wang Quansheng Liu Yongxing Zhang Shukun Le Chengzhang Zhu Inner Mongolia Key Laboratory of High-Value Functional Utilization of Low Rank Carbon Resources Chemical Engineering CollegeInner Mongolia University of TechnologyHohhot010050China Department of Chemical and Environmental Engineering Hetao CollegeBayan Nur015000China Anhui Province Key Laboratory of Pollutant Sensitive Materials and Environmental Remediation Huaibei Normal UniversityHuaibei235000China School of Environmental Science and Engineering Nanjing Tech UniversityNanjing210009China Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science MOEQingdao University of Science and TechnologyQingdao266042China

Cerium-based materials are widely used in various applications such as photocatalytic environmental remediation,CO_(2)photoreduction and photocatalytic hydrogen production due to their unique optical properties and special oxygen vacancy formation *** special external electronic structure of cerium(4f^(1)5d^(1)6s^(2)),the highly electronic 4f orbital,promotes the formation of oxygen vacancies through Ce^(4+)/Ce^(3+)conversion,thereby improving the optical properties of the ***,the application of cerium-based materials in the field of photocatalysis has been of great interest to *** this paper,we briefly review the synthesis of cerium-based photocatalysts and their applications in pollutant removal,CO_(2)reduction,and hydrogen production,as well as their promising applications.

关键词： Cerium-based materials Oxygen vacancy Morphology Photocatalytic application Rare earths

来源：评论

学校读者我要写书评

暂无评论

Flexible self-supporting organic cathode with interface engineering for high-performance and wide-temperature sodium-ion batteries

引用

Carbon Energy 2024年第11期6卷 286-297页

作者： Lei Wang Suqiao Fang Haichao Wang Qianqian Peng Yifeng Liu Hanghang Dong Hao Yan Yong Wang Shulei Chou Bing Sun Yao Xiao Shuangqiang Chen Department of Chemical Engineering School of Environmental and Chemical Engineering Shanghai UniversityShanghaiChina Institute for Carbon Neutralization Technology College of Chemistry and Materials Engineering Wenzhou UniversityWenahouzhejiang.China School of Energy and Power Engineering Nanjing University of Science and TechnologyNanjingChina School of Mathematical and Physical Sciences Centre for Clean Energy Technology Faculty of Science University of Technology SydneyNew South WalesAustralia Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) Nankai UniversityTianjinChina

Flexible electrode design with robust structure and good performance is one of the priorities for flexible batteries to power emerging wearable electronics,and organic cathode materials have become contenders for flexible self-supporting ***,issues such as easy electrolyte solubility and low intrinsic conductivity contribute to high polarization and rapid capacity ***,we have designed a flexible self-supporting cathode based on perylene-3,4,9,10-tetracarboxylic dianhydride(PTCDA),interfacial engineering enhanced by polypyrrole(PPy),and carbon nanotubes(CNTs),forming the interconnected and flexible PTCDA/PPy/CNTs using polymerization reaction and vacuum filtration methods,effectively curbing those *** used as the cathode of sodium-ion batteries,PTCDA/PPy/CNTs exhibit excellent rate capability(105.7 mAh g^(−1) at 20 C),outstanding cycling stability(79.4%capacity retention at 5 C after 500 cycles),and remarkable wide temperature application capability(86.5 mAh g^(−1) at−30℃ and 115.4 mAh g^(−1) at 60℃).The sodium storage mechanism was verified to be a reversible oxidation reaction between two Na+ions and carbonyl groups by density functional theory calculations,in situ infrared Fourier transform infrared spectroscopy,and in situ Raman ***,the pouch cells based on PTCDA/PPy/CNTs exhibit good mechanical flexibility in various mechanical *** work inspires more rational designs of flexible and self-supporting organic cathodes,promoting the development of high-performance and wide-temperature adaptable wearable electronic devices.

关键词： flexible self-supporting cathode high performance in situ characterization theoretical calculations wide temperafure application

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：