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An account of the strategies to enhance the water splitting efficiency of noble-metal-free electrocatalysts

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Journal of Energy Chemistry 2021年第8期30卷 160-190,I0005页

作者： Subhasis Shit Saikat Bolar Naresh Chandra Murmu Tapas kuila Surface Engineering&Tribology Division Council of Scientific and Industrial Research-Central Mechanical Engineering Research InstituteMahatma Gandhi AvenueDurgapur 713209India Academy of Scientific and Innovative Research(AcSIR) CSIR-Human Resource Development Centre(CSIR-HRDC)CampusPostal Staff College AreaSector 19Kamla Nehru NagarGhaziabad 201002India

The electrolysis of water for hydrogen generation has shown immense promise as an energy conversion technology for the green energy *** concurrently occurring electrochemical reactions in water electrolysis(hydrogen and oxygen evolution reactions)are sluggish in nature and therefore the employment of electrocatalysts is highly ***-metal-based electrocatalysts(Pt,Ru O_(2),Ir O_(2),etc.)have shown superior activity towards these ***,their lower natural abundance and inferior stability make the cost to performance ratio of water electrolysis too ***,huge amount of research efforts are being carried out to develop electrocatalysts consisting of earth abundant elements(transition metals,carbon etc.)as the replacement of these noble-metal-based *** metal compounds,carbonaceous and hybrid materials have shown promise as efficient electrocatalysts but there is still huge gap between the activities of these materials and the noble-metal-based *** strategies like morphology modulation,elemental doping,defect engineering *** being deployed to enhance the activity of these noble-metal-free *** review summarizes these strategies and thoroughly discusses the reason behind the changes in activity of the electrocatalysts owing to these ***,the remaining research gaps and future prospects in this field are also discussed in detail.

关键词： Water splitting Electrocatalyst Morphology Doping Defect engineering Phase engineering

Structural, microstructural, and thermal characterizations of a chalcopyrite concentrate from the Singhbhum shear zone, India

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International Journal of Minerals,Metallurgy and Materials 2015年第3期22卷 225-232页

作者： Ritayan Chatterjee Shamik Chaudhuri Saikat Kumar kuila Dinabandhu Ghosh Department of Metallurgical and Materials Engineering Jadavpur University Division of Materials Engineering Lund University

The structural and morphological characterizations of a chalcopyrite concentrate, collected from the Indian Copper Complex, Ghatshila, India, were carried out by X-ray diffraction, scanning electron microscopy, and energy-dispersive X-ray spectroscopy. The con- centmte powder was composed mainly of free chalcopyrite and low quartz in about 3：1 weight ratio. The particle size was about 100 μm. Spectroscopic studies （FTIR, Raman, UV-visible） of the concentrate supported the XRD findings, and also revealed a marginal oxidation of the sulfide phase. The energy band gap of the sulfide was found to be 3.4 eV. Differential thermal analysis and thermogravimetry of the con- centrate showed a decomposition of chalcopyrite at 658 K with an activation energy of 208 kJ-mol 1, and two successive structural changes of silica at 848 K and 1145 K.

关键词： chalcopyrite structural properties microstructure thermal characteristics

A strategic way of high-performance energy storage device development with environmentally viable “Water-in-salt” electrolytes

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Journal of Energy Chemistry 2023年第3期78卷 350-373,I0010页

作者： Prakas Samanta Souvik Ghosh Aniruddha Kundu Pranab Samanta Naresh Chandra Murmu Tapas kuila Surface Engineering&Tribology Division Council of Scientific and Industrial Research Central Mechanical Engineering Research InstituteMahatma Gandhi AvenueDurgapur-713209West BengalIndia Academy of Scientific and Innovative Research(AcSIR) CSIR-Human Resource Development Centre(CSIR-HRDC)CampusPostal Staff College AreaSector 19Kamla Nehru NagarGhaziabad-201002Uttar PradeshIndia

Development of cost-effective and environmental friendly energy storage devices(ESDs) has attracted widespread attention in recent scenario of energy ***,the environmentally viable "water-in-salt"(WiS) electrolytes has received significant interest for the development of advanced high performance *** WiS electrolyte exhibits wide electrochemical stability window(ESW),highsafety,non-flammability and superior electrochemical performance compared to the conventional "salt-in-water" *** review aims to provide a comprehensive discussion on WiS electrolyte based on theoretical,electrochemical and physicochemical characteristics.A strategic way for the usage of WiS electrolyte in rechargeable metal-ion batteries and supercapacitors with potentially improved electrochemical performance has been reviewed *** review also discussed the unique advantages of WiS electrolytes as well as the future scope and challenges.

关键词： Water-in-salt electrolyte Solid electrolyte interphase High energy density Aqueous batteries Aqueous supercapacitors

亲水型功能化石墨烯的分散性及其对水泥基复合材料力学性能的影响

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复合材料学报 2021年第2期38卷 622-629页

作者：余东升付芳贾铁昆李继利 TAPAS kuila 骆雪田新生张慧军周加左刘君梦龙巍云陈欢洛阳理工学院材料科学与工程学院洛阳471023 科学与工业研究理事会中央机械工程研究所表面工程与摩擦学部杜尔加布尔713209

为了解决石墨烯纳米片在水泥基体中的分散问题,采用芳基重氮盐(F)对氧化石墨烯(GO)进行改性,制备了一种新型亲水型功能化石墨烯(FG)。结果表明,FG在水溶剂中最大的分散浓度能够达到2.1 mg/mL。FTIR、拉曼光谱和XPS结果表明F成功对石墨... 详细信息

为了解决石墨烯纳米片在水泥基体中的分散问题,采用芳基重氮盐(F)对氧化石墨烯(GO)进行改性,制备了一种新型亲水型功能化石墨烯(FG)。结果表明,FG在水溶剂中最大的分散浓度能够达到2.1 mg/mL。FTIR、拉曼光谱和XPS结果表明F成功对石墨烯进行了表面改性。对比纯水泥基体材料,本文所制备的亲水型FG/水泥复合材料的28天抗折强度和抗压强度相对提高了95.3%和78.3%。F对GO进行改性,实现了石墨烯在水泥基材料中的均匀分散及对其力学性能的提升。

关键词：功能化石墨烯水泥抗折强度抗压强度