Download or read book Transition Metal Chalcogenide Hybrid Systems as Catalysts for Energy Conversion and Biosensing written by Siddesh Umapathi and published by . This book was released on 2020 with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Generation of hydrogen and oxygen through catalyst-aided water splitting which has immense applications in metal air batteries, PEM fuel cells and solar to fuel energy production, has been one of the critical topics in recent times. The state of art oxygen evolution reaction (OER), oxygen reduction reaction (ORR), hydrogen evolution reaction (HER) catalysts are mostly comprised of precious metals. The current challenge lies in replacing these precious metal-based catalysts with non-precious earth-abundant materials without compromising catalytic efficiency. This research explores mixed metal selenides containing Fe-Ni, Fe-Co and RhSe which were hydrothermally synthesized and/or electrodeposited and tested for OER and ORR catalytic activity in alkaline medium. This spinel class of compounds generically referred to as AB2Se4 where A and B are divalent and trivalent cations respectively. Interestingly, FeCo2Se4 and FeNi2Se4, both showed highly efficient catalytic activity with low overpotential. Increase in performance was observed when these two spinel compositions were mixed with conducting carbon matrix, which decreased the overpotential significantly and increased the stability. Finally, the metal selenides were also applied towards electrochemical bio sensing of dopamine and glucose. Electrodeposited and hydrothermally synthesized CuSe was studied towards detection of ultralow concentrations of dopamine in neutral phosphate buffer solution. The electrodeposited CuSe was also active towards detection of glucose in alkaline electrolyte. CuSe showed low detection limit, high sensitivity and selectivity towards these biomolecules"--Abstract, page v.
Download or read book Earth abundant Transition Metal Chalcogenide Electrocatalysts for Renewable Energy Applications written by and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Energy sustainability is perhaps the greatest ongoing challenge facing humanity. Our need to replace fossil fuel-based sources of energy with environmentally friendly, secure, and renewable alternatives continues to grow, and although this fact has been long realized by the scientific community and beyond, no present-day solution effectively competes with fossil fuels from an economic or performance standpoint. Although several renewable energy technologies, including photovoltaic solar cells and fuel cell systems, can efficiently supply usable power with little or no environmental impact, they often suffer from high costs due to the expensive raw materials and complex processing steps required to produce high performance devices. These costs ultimately limit the scalability of such technologies and, consequently, their potential to address our looming energy concerns. However, the viability of many renewable energy technologies---particularly those rooted in electrochemistry---could be substantially increased by replacing expensive and scarce materials (such as noble metals) with low-cost, earth-abundant alternatives that exhibit comparable performance. The work collected here primarily focuses on identifying and developing such alternative electrocatalysts, generally within the family of transition metal chalcogenides, and assessing their utility in electrochemical energy conversion applications. Chapter 1 reviews both electrochemical energy conversion and alternative earth-abundant electrocatalyst materials, motivating their investigation and outlining the key challenges yet to be overcome. In Chapter 2, metallic cobalt pyrite (cobalt disulfide, CoS2) is introduced as a new earth-abundant electrocatalyst candidate material capable of boosting the performance of quantum dot-sensitized solar cells while simultaneously eliminating their reliance on precious platinum-based electrodes. Chapter 3 further builds upon Chapter 2 by establishing the high intrinsic electrocatalytic activity of CoS2 toward the hydrogen evolution reaction. Here, micro- and nanostructuring strategies are also demonstrated to synergistically enhance the electrocatalytic performance and stability of CoS2. Chapter 4 broadens the family of pyrite-phase electrocatalysts by showing that other earth-abundant transition metal disulfides exhibit electrocatalytic activity toward both polysulfide reduction and the hydrogen evolution reaction. Collectively, this work represents substantial progress toward the development of earth-abundant transition metal chalcogenide electrocatalysts for renewable energy applications, with the expectation that the lessons learned here should translate to other materials systems.
Download or read book Exploring Transition Metal Chalcogenides for Bio Sensing and Environmental Remediation written by Bahareh Golrokh Amin and published by . This book was released on 2019 with total page 187 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Electrocatalysts play an inevitable role in many applications including energy storage, energy conversion, and biosensing. The state-of-the-art noble metal-based electrocatalysts have long been used in full water splitting, non-enzymatic glucose sensing, and supercapacitors. However, scarcity and high cost of noble metals restrict utilization of such electrocatalysts in large-scale implementations. Transition metal-based electrodes have been considered as a potential solution to address these drawbacks as well as to enhance the electrocatalytic performance. In this work, applicability of non-oxidic transition metal based electrocatalysts is evaluated. Transition metal chalcogenides are expected to have high catalytic performance owing to their facilitated electron cloud delocalization on the transition metal site as well as enhanced covalency in the lattice due to the low anion electronegativity. To examine this theory, CoNi2Se4 is studied for its application in full water splitting. This catalyst shows an excellent electrocatalytic activity with low overpotential of 160 mV @ 10 mA cm−2 for OER. CoNi2Se4-rGO on Ni foam has also been employed as an electrocatalyst for the direct oxidation of glucose. A high sensitivity of 18.89 mA mM−1 cm−2 at low applied potential of 0.35 V vs. Ag|AgCl is achieved. For the same application, we investigated Ni3Te2. With electrodeposition method, a high glucose detection sensitivity of 41.615 mA cm−2 mM−1 is reported. We also fabricated a hydrothermally synthesized Ni3Te2 with a sensitivity of 35.213 mA cm−2 mM−1. Finally, we examined NiCo2Se4/rGO for its application in supercapacitors and achieved a high specific capacitance of 2038.55 F g−1 with a high energy density and power density of 67.01 W h kg−1 and 903.61 W kg−1, respectively"--Abstract, page iv.
Download or read book Chalcogenide Based Nanomaterials as Photocatalysts written by Mohammad Mansoob Khan and published by Elsevier. This book was released on 2021-04-07 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chalcogenide-Based Nanomaterials as Photocatalysts deals with the different types of chalcogenide-based photocatalytic reactions, covering the fundamental concepts of photocatalytic reactions involving chalcogenides for a range of energy and environmental applications. Sections focus on nanostructure control, synthesis methods, activity enhancement strategies, environmental applications, and perspectives of chalcogenide-based nanomaterials. The book offers guidelines for designing new chalcogenide-based nanoscale photocatalysts at low cost and high efficiency for efficient utilization of solar energy in the areas of energy production and environment remediation. Provides information on the development of novel chalcogenide-based nanomaterials Outlines the fundamentals of chalcogenides-based photocatalysis Includes techniques for heterogeneous catalysis based on chalcogenide-based nanomaterials
Download or read book Two Dimensional Transition Metal Dichalcogenides written by Narayanasamy Sabari Arul and published by Springer. This book was released on 2019-07-30 with total page 355 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents advanced synthesis techniques adopted to fabricate two-dimensional (2D) transition metal dichalcogenides (TMDs) materials with its enhanced properties towards their utilization in various applications such as, energy storage devices, photovoltaics, electrocatalysis, electronic devices, photocatalysts, sensing and biomedical applications. It provides detailed coverage on everything from the synthesis and properties to the applications and future prospects of research in 2D TMD nanomaterials.
Download or read book Applications of Chalcogenides S Se and Te written by Gurinder Kaur Ahluwalia and published by Springer. This book was released on 2018-06-23 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces readers to a wide range of applications for elements in Group 16 of the periodic table, such as, optical fibers for communication and sensing, X-ray imaging, electrochemical sensors, data storage devices, biomedical applications, photovoltaics and IR detectors, the rationale for these uses, the future scope of their applications, and expected improvements to existing technologies. Following an introductory section, the book is broadly divided into three parts—dealing with Sulfur, Selenium, and Tellurium. The sections cover the basic structure of the elements and their compounds in bulk and nanostructured forms; properties that make these useful for various applications, followed by applications and commercial products. As the global technology revolution necessitates the search for new materials and more efficient devices in the electronics and semiconductor industry, Applications of Chalcogenides: S, Se, and Te is an ideal book for a wide range of readers in industry, government and academic research facilities looking beyond silicon for materials used in the electronic and optoelectronic industry as well as biomedical applications.
Download or read book Fabrication of Metal Organic Framework Derived Nanomaterials and Their Electrochemical Applications written by Wei Xia and published by Springer. This book was released on 2018-04-03 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis systematically introduces readers to a new metal-organic framework approach to fabricating nanostructured materials for electrochemical applications. Based on the metal-organic framework (MOF) approach, it also demonstrates the latest ideas on how to create optimal MOF and MOF-derived nanomaterials for electrochemical reactions under controlled conditions. The thesis offers a valuable resource for researchers who want to understand electrochemical reactions at nanoscale and optimize materials from rational design to achieve enhanced electrochemical performance. It also serves as a useful reference guide to fundamental research on advanced electrochemical energy storage materials and the synthesis of nanostructured materials.
Download or read book 2D Metal Carbides and Nitrides MXenes written by Babak Anasori and published by Springer Nature. This book was released on 2019-10-30 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the rapidly expanding field of two-dimensional (2D) transition metal carbides and nitrides (MXenes). It covers fundamental knowledge on synthesis, structure, and properties of these new materials, and a description of their processing, scale-up and emerging applications. The ways in which the quickly expanding family of MXenes can outperform other novel nanomaterials in a variety of applications, spanning from energy storage and conversion to electronics; from water science to transportation; and in defense and medical applications, are discussed in detail.
Download or read book 2D Monoelemental Materials Xenes and Related Technologies written by Zongyu Huang and published by CRC Press. This book was released on 2022-04-19 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: Monoelemental 2D materials called Xenes have a graphene-like structure, intra-layer covalent bond, and weak van der Waals forces between layers. Materials composed of different groups of elements have different structures and rich properties, making Xenes materials a potential candidate for the next generation of 2D materials. 2D Monoelemental Materials (Xenes) and Related Technologies: Beyond Graphene describes the structure, properties, and applications of Xenes by classification and section. The first section covers the structure and classification of single-element 2D materials, according to the different main groups of monoelemental materials of different components and includes the properties and applications with detailed description. The second section discusses the structure, properties, and applications of advanced 2D Xenes materials, which are composed of heterogeneous structures, produced by defects, and regulated by the field. Features include: Systematically detailed single element materials according to the main groups of the constituent elements Classification of the most effective and widely studied 2D Xenes materials Expounding upon changes in properties and improvements in applications by different regulation mechanisms Discussion of the significance of 2D single-element materials where structural characteristics are closely combined with different preparation methods and the relevant theoretical properties complement each other with practical applications Aimed at researchers and advanced students in materials science and engineering, this book offers a broad view of current knowledge in the emerging and promising field of 2D monoelemental materials.
Download or read book Advances in Nanomaterials written by Mushahid Husain and published by Springer. This book was released on 2016-03-15 with total page 439 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a review of the latest research findings and key applications in the field of nanomaterials. The book contains twelve chapters on different aspects of nanomaterials. It begins with key fundamental concepts to aid readers new to the discipline of nanomaterials, and then moves to the different types of nanomaterials studied. The book includes chapters based on the applications of nanomaterials for nano-biotechnology and solar energy. Overall, the book comprises chapters on a variety of topics on nanomaterials from expert authors across the globe. This book will appeal to researchers and professional alike, and may also be used as a reference for courses in nanomaterials.
Download or read book Electrochemical Biosensors written by Serge Cosnier and published by CRC Press. This book was released on 2015-01-26 with total page 405 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since four decades, rapid detection and monitoring in clinical and food diagnostics and in environmental and biodefense have paved the way for the elaboration of electrochemical biosensors. Thanks to their adaptability, ease of use in relatively complex samples, and their portability, electrochemical biosensors now are one of the mainstays of analy
Download or read book Electrochemical Data written by B. E. Conway and published by Greenwood Publishing Group. This book was released on 1952 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Metal Chalcogenide Nanostructures for Renewable Energy Applications written by Ahsanulhaq Qurashi and published by John Wiley & Sons. This book was released on 2014-11-21 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: This first ever reference book that focuses on metal chalcogenide semiconductor nanostructures for renewable energy applications encapsulates the state-of-the-art in multidisciplinary research on the metal chalcogenide semiconductor nanostructures (nanocrystals, nanoparticles, nanorods, nanowires, nanobelts, nanoflowers, nanoribbons and more). The properties and synthesis of a class of nanomaterials is essential to renewable energy manufacturing and this book focuses on the synthesis of metal chalcogendie nanostructures, their growth mechanism, optical, electrical, and other important properties and their applications in different diverging fields like photovoltaics, hydrogen production, theromelectrics, lithium battery, energy storage, photocatalysis, sensors. An important reference source for students, scientists, engineers, researchers and industrialists working on nanomaterials-based energy aspects associated with chemistry, physics, materials science, electrical engineering, energy science and technology, and environmental science.
Download or read book Graphene Based Electrochemical Sensors for Biomolecules written by Alagarsamy Pandikumar and published by Elsevier. This book was released on 2018-10-22 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: Graphene-Based Electrochemical Sensors for Biomolecules presents the latest on these nanomaterials that have gained a lot of attention based on their unique properties of high mechanical flexibility, large surface area, chemical stability, superior electric and thermal conductivities that render them great choices as alternative electrode materials for electrochemical energy storage and sensor applications. The hybridization of graphene with other nanomaterials induces a synergetic effect, leading to the improvement in electrical conductivity, stability and an enhancement of the electrocatalytic activity of the new nanocomposite material. This book discusses the electrochemical determination of a variety of biomolecules using graphene-based nanocomposite materials. Finally, recent progress in the development of electrochemical sensors using graphene-based nanocomposite materials and perspectives on future opportunities in sensor research and development are discussed in detail. Covers the importance of detecting biomolecules and the application of graphene and its nanocomposite materials in the detection of a wide variety of bioanalytes Presents easily understood fundamentals of electrochemical sensing systems and the role of graphene-based nanocomposite materials in research and development
Download or read book Conducting Polymers written by György Inzelt and published by Springer Science & Business Media. This book was released on 2008-04-08 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a systematic survey of the knowledge accumulated in this field in the last thirty years. It includes material on the thermodynamic aspects of the polymers, the theory of the mechanism of charge transport processes, and the chemical and physical properties of these compounds. Also covered are the techniques of characterization, the electrochemical methods of synthesis, and the application of these systems. Inzelt’s book is a must-read for electrochemists and others.
Download or read book Transmogrified Tales written by Gigi Calicchia and published by Lulu.com. This book was released on with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cadmium Telluride Quantum Dots written by John Donegan and published by CRC Press. This book was released on 2013-12-03 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the last two decades, semiconductor quantum dots—small colloidal nanoparticles—have garnered a great deal of scientific interest because of their unique properties. Among nanomaterials, CdTe holds special technological importance as the only known II–VI material that can form conventional p–n junctions. This makes CdTe very important for the development of novel optoelectronic devices such as light-emitting diodes, solar cells, and lasers. Moreover, the demand for water-compatible light emitters and the most common biological buffers give CdTe quantum dots fields a veritable edge in biolabeling and bioimaging. Cadmium Telluride Quantum Dots: Advances and Applications focuses on CdTe quantum dots and addresses their synthesis, assembly, optical properties, and applications in biology and medicine. It makes for a very informative reading for anyone involved in nanotechnology and will also benefit those scientists who are looking for a comprehensive account on the current state of quantum dot–related research.
