Download or read book Advanced Carbon Nanomaterials as Non precious Metal Catalysts for Fuel Cells written by Pouyan Zamani and published by . This book was released on 2017 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymer electrolyte membrane fuel cells (PEMFCs) are electrochemical devices that efficiently convert hydrogen and oxygen into electricity and water. Their clean point of operation emissions and continuous operation have resulted in PEMFCs being highly touted as integral components of sustainable energy infrastructures, most notably in the transportation sector as a green alternative to the internal combustion engine. The issues associated with hydrogen production and distribution aside, the commercial viability of PEMFCs into the auto- motive sector is hindered by their high cost and inadequate long-term operational stability. The main factor behind both of these problems is the platinum-based electrocatalysts used at the cathode to facilitate the inherently sluggish oxygen reduction reaction (ORR). These expensive precious metal catalysts comprise almost half of the overall PEMFC stack cost and tend to degrade in the cathode environment that is very corrosive due to the acidic and potentiodynamic conditions. The current cost targets for PEMFCs are unattainable unless the extensive reliance on this precious metal is alleviated. The cost reduction can ultimately be accomplished by developing alternative cathode catalysts for the ORR. Research on new platinum catalyst supports or nanostructured platinum alloys to increase ORR activity on a precious metal mass basis have been largely successful. This approach is not ideal, however, due to the volatile pricing and geopolitical instabilities that can likely affect the supply of platinum. For these reasons, the development of entirely non-precious metal catalysts (NPMCs) for the ORR is highly desirable. This is the objective of this thesis, as will be presented in the following sections.

Download or read book Nanomaterials for Direct Alcohol Fuel Cell written by Yixuan Wang and published by CRC Press. This book was released on 2016-12-01 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: Direct alcohol fuel cells (DAFCs), such as methanol and ethanol ones, are very promising advanced power systems that may considerably reduce dependence on fossil fuels and are, therefore, attracting increased attention worldwide. Nanostructured materials can improve the performance of the cathodes, anodes, and electrolytes of DAFCs. This book focuses on the most recent advances in the science and technology of nanostructured materials for direct alcohol fuel cells, including novel non-noble or low noble metal catalysts deposited on the graphene layer and metal-free doped carbon black for oxygen electroreduction reaction, Sn-based bimetallic and trimetallic nanoparticles for alcohol electro-oxidation reaction, and novel nanomaterials for promoting proton transfer in electrolytes. In addition, the book includes chapters from not only experimentalists but also computational chemists who have worked in the development of advanced power systems for decades. Illustrated throughout with excellent figures, this multidisciplinary work is not just a reference for researchers in chemistry and materials science, but a handy textbook for advanced undergraduate- and graduate-level students in nanoscience- and nanotechnology-related courses, especially those with an interest in developing novel materials for advanced power systems.

Download or read book Carbon Nanomaterials for Advanced Energy Systems written by Wen Lu and published by John Wiley & Sons. This book was released on 2015-09-28 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the proliferation of electronic devices, the world will need to double its energy supply by 2050. This book addresses this challenge and discusses synthesis and characterization of carbon nanomaterials for energy conversion and storage. Addresses one of the leading challenges facing society today as we steer away from dwindling supplies of fossil fuels and a rising need for electric power due to the proliferation of electronic products Promotes the use of carbon nanomaterials for energy applications Systematic coverage: synthesis, characterization, and a wide array of carbon nanomaterials are described Detailed descriptions of solar cells, electrodes, thermoelectrics, supercapacitors, and lithium-ion-based storage Discusses special architecture required for energy storage including hydrogen, methane, etc.

Download or read book Nanomaterials for Fuel Cell Catalysis written by Kenneth I. Ozoemena and published by Springer. This book was released on 2016-07-05 with total page 583 pages. Available in PDF, EPUB and Kindle. Book excerpt: Global experts provide an authoritative source of information on the use of electrochemical fuel cells, and in particular discuss the use of nanomaterials to enhance the performance of existing energy systems. The book covers the state of the art in the design, preparation, and engineering of nanoscale functional materials as effective catalysts for fuel cell chemistry, highlights recent progress in electrocatalysis at both fuel cell anode and cathode, and details perspectives and challenges in future research.

Download or read book Metal free Heteroatom Doped Carbon Nanomaterials for Energy Conversion and Storage written by MIN. WANG and published by . This book was released on 2017 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fuel cell is considered as one of the most environmentally friendly devices for sustainably converting chemical energy to electricity. Till now, its large-scale application has been hindered by the high-cost of platinum catalysts required for oxygen reduction reaction (ORR) at the cathode. Although the amount of noble metal needed for the desired catalytic effect could be reduced by using nonprecious-metal catalysts, they are still too expensive for the commercial mass production of clean energy, or their energy conversion efficiency is too low. Owing to the related low cost, large surface area, high electrical conductivity, rich electrocatalytic active sites, and corrosion resistant properties, a new class of carbon-based, metal-free catalysts has been developed which could dramatically reduce the cost and increase the efficiency of fuel cells when used as alternative ORR catalysts. For example, various heteroatom-doped carbon nanomaterials have been developed as efficient metal-free catalysts for ORR. However, their performance still needs to be further improved to pave the way for technological advancement, particularly in the proton exchange membrane fuel cell (PEMFC). Another problem is that most of the ORR studies on carbon-based electrocatalysts have been conducted using a half electrochemical cell with alkaline medium, the electrochemical performance of carbon-based metal-free nanomaterials in acidic medium is rarely, let alone the single fuel cell. In this study, various metal-free carbon-based catalysts have been developed by rational heteroatom doping coupled with super advanced structures (by intrinsic and macroscopic tune). Different units, including carbon nanotubes (CNTs), graphene, graphitic carbon nitrides, and biomass, were selected for constructing novel carbon-based nanomaterials with highly porous structure and abundant electrochemically active sites. Heteroatoms doped or co-doped carbon nanotubes (B,N-CNT and N,F-CNTs) , carbon nitride decorated nitrogen doped graphene (C3N4@N-G) composites, N-doped graphene/CNT hybrids (N-G-CNT), and N-doped hierarchical porous carbon have been successfully developed as high efficient catalysts. The ORR performances of these carbon-based catalysts were investigated in three-electrode electrochemical setup in both alkaline and acidic mediums. PEMFCs utilizing the carbon-based catalysts as cathode catalyst for ORR were also fabricated and studied in detail. Especially, the rationally designed N-G-CNT exhibited excellent catalytic activities and selectivity for ORR, even with good single cell performance.

Download or read book Carbon Based Nanomaterials for Advanced Thermal and Electrochemical Energy Storage and Conversion written by Cheng-Te Lin and published by Elsevier. This book was released on 2019-07-20 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon Based Nanomaterials for Advanced Thermal and Electrochemical Energy Storage and Conversion presents a comprehensive overview of recent theoretical and experimental developments and prospects on carbon-based nanomaterials for thermal, solar and electrochemical energy conversion, along with their storage applications for both laboratory and industrial perspectives. Large growth in human populations has led to seminal growth in global energy consumption, hence fossil fuel usage has increased, as have unwanted greenhouse gases, including carbon dioxide, which results in critical environmental concerns. This book discusses this growing problem, aligning carbon nanomaterials as a solution because of their structural diversity and electronic, thermal and mechanical properties. Provides an overview on state-of-the-art carbon nanomaterials and key requirements for applications of carbon materials towards efficient energy storage and conversion Presents an updated and comprehensive review of recent work and the theoretical aspects on electrochemistry Includes discussions on the industrial production of carbon-based materials for energy applications, along with insights from industrial experts

Download or read book Nanocarbons for Advanced Energy Storage written by Xinliang Feng and published by John Wiley & Sons. This book was released on 2015-08-25 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this second volume in the first book series on nanocarbons for advanced applications the highly renowned series and volume editor has put together a top author team of internationally acclaimed experts on carbon materials. Divided into three major parts, this reference provides a current overview of the design, synthesis, and characterization of nanocarbons, such as carbon nanotubes, fullerenes, graphenes, and porous carbons for energy conversion applications. It covers such varied topics as electrocatalysts for oxygen reduction reactions in the different types of fuel cells, metal-air batteries and electrode materials for photovoltaic devices, as well as photocatalysts, electrocatalysts and photoelectrocatalysts for water splitting. Throughout, the authors highlight the unique aspects of nanocarbon materials in these fields, with a particular focus on the physico-chemical properties which lead to enhanced device performances.

Download or read book Nanostructured and Advanced Materials for Fuel Cells written by San Ping Jiang and published by CRC Press. This book was released on 2013-12-07 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt: Boasting chapters written by leading international experts, Nanostructured and Advanced Materials for Fuel Cells provides an overview of the progress that has been made so far in the material and catalyst development for fuel cells. The book covers the most recent developments detailing all aspects of synthesis, characterization, and performance.It

Download or read book Carbon Based Metal Free Catalysts written by Liming Dai and published by John Wiley & Sons. This book was released on 2018-08-29 with total page 746 pages. Available in PDF, EPUB and Kindle. Book excerpt: Offering comprehensive coverage of this hot topic, this two-volume handbook and ready reference treats a wide range of important aspects, from synthesis and catalytic properties of carbon materials to their applications as metal-free catalysts in various important reactions and industrial processes. Following a look at recent advances in the development of carbon materials as carbon-based metal-free catalysts, subsequent sections deal with a mechanistic understanding for the molecular design of efficient carbon-based metal-free catalysts, with a special emphasis on heteroatom-doped carbon nanotubes, graphene, and graphite. Examples of important catalytic processes covered include clean energy conversion and storage, environmental protection, and synthetic chemistry. With contributions from world-leading scientists, this is an indispensable source of information for academic and industrial researchers in catalysis, green chemistry, electrochemistry, materials science, nanotechnology, energy technology, and chemical engineering, as well as graduates and scientists entering the field.

Download or read book Metal Air Batteries written by Xin-bo Zhang and published by John Wiley & Sons. This book was released on 2019-02-11 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive overview of the research developments in the burgeoning field of metal-air batteries An innovation in battery science and technology is necessary to build better power sources for our modern lifestyle needs. One of the main fields being explored for the possible breakthrough is the development of metal-air batteries. Metal-Air Batteries: Fundamentals and Applications offers a systematic summary of the fundamentals of the technology and explores the most recent advances in the applications of metal-air batteries. Comprehensive in scope, the text explains the basics in electrochemical batteries and introduces various species of metal-air batteries. The author-a noted expert in the field-explores the development of metal-air batteries in the order of Li-air battery, sodium-air battery, zinc-air battery and Mg-O2 battery, with the focus on the Li-air battery. The text also addresses topics such as metallic anode, discharge products, parasitic reactions, electrocatalysts, mediator, and X-ray diffraction study in Li-air battery. Metal-Air Batteries provides a summary of future perspectives in the field of the metal-air batteries. This important resource: -Covers various species of metal-air batteries and their components as well as system designation -Contains groundbreaking content that reviews recent advances in the field of metal-air batteries -Focuses on the battery systems which have the greatest potential for renewable energy storage Written for electrochemists, physical chemists, materials scientists, professionals in the electrotechnical industry, engineers in power technology, Metal-Air Batteries offers a review of the fundamentals and the most recent developments in the area of metal-air batteries.

Download or read book Carbon Based Nanomaterials for Energy Conversion and Storage written by Jia-Nan Zhang and published by Springer Nature. This book was released on 2022-08-26 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book systematically summarizes the advanced development of carbon-based nanomaterials for electrochemical catalysis, and it is comprised of four sections. The first section discusses about the fundamental synthesis, characterization techniques, and catalytic effects on the energy conversion and storage mechanism. The second section elaborately reviews various types of electrocatalytic reactions on carbon-based materials and their performance. The third section focuses on batteries about carbon-based materials with different storage mechanism. And the last one, the following enlightenment in terms of theoretical development and experimental research is provided to the general readers: 1) Precise design and construction of local atomic and electronic structures at the interface of catalysts; 2) Selective activation and directed conversion of carbon-based energy-carrying molecules at the interface; 3) Interaction mechanism and regulation of catalyst solid surface interface properties under environment and external field. This book will be useful for researchers and students who are interested in carbon-based nanomaterials, electrochemical catalysts and energy storage.

Download or read book NanoCarbon A Wonder Material for Energy Applications written by Ram K. Gupta and published by Springer Nature. This book was released on with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Carbon Nanomaterials for Advanced Energy Systems written by Wen Lu and published by John Wiley & Sons. This book was released on 2015-11-02 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the proliferation of electronic devices, the world will need to double its energy supply by 2050. This book addresses this challenge and discusses synthesis and characterization of carbon nanomaterials for energy conversion and storage. Addresses one of the leading challenges facing society today as we steer away from dwindling supplies of fossil fuels and a rising need for electric power due to the proliferation of electronic products Promotes the use of carbon nanomaterials for energy applications Systematic coverage: synthesis, characterization, and a wide array of carbon nanomaterials are described Detailed descriptions of solar cells, electrodes, thermoelectrics, supercapacitors, and lithium-ion-based storage Discusses special architecture required for energy storage including hydrogen, methane, etc.

Download or read book Non Noble Metal Fuel Cell Catalysts written by Zhongwei Chen and published by John Wiley & Sons. This book was released on 2014-04-03 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written and edited by top fuel cell catalyst scientists and engineers from both industry and academia, this is the first book to provide a complete overview of this hot topic. It covers the synthesis, characterization, activity validation and modeling of different non-noble metal electrocatalysts, as well as their integration into fuel cells and their performance validation, while also discussing those factors that will drive fuel cell commercialization. With its well-structured approach, this is a must-have for researchers working on the topic, and an equally valuable companion for newcomers to the field.

Download or read book Novel Non Precious Metal Electrocatalysts for Oxygen Electrode Reactions written by Hui Yang and published by MDPI. This book was released on 2019-11-01 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research on alternative energy harvesting technologies, conversion and storage systems with high efficiency, cost-effective and environmentally friendly systems, such as fuel cells, rechargeable metal-air batteries, unitized regenerative cells, and water electrolyzers has been stimulated by the global demand on energy. The conversion between oxygen and water plays a key step in the development of oxygen electrodes: oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), processes activated mostly by precious metals, like platinum. Their scarcity, their prohibitive cost, and declining activity greatly hamper large-scale applications. This issue reports on novel non-precious metal electrocatalysts based on the innovative design in chemical compositions, structure, and morphology, and supports for the oxygen reaction.

Download or read book Nitrogen doped Carbon Materials as Oxygen Reduction Reaction Catalysts for Metal air Fuel Cells and Batteries written by Zhu Chen and published by . This book was released on 2012 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal air battery has captured the spotlight recently as a promising class of sustainable energy storage for the future energy systems. Metal air batteries offer many attractive features such as high energy density, environmental benignity, as well as ease of fuel storage and handling. In addition, wide range of selection towards different metals exists where different energy capacity can be achieved via careful selection of different metals. The most energy dense systems of metal-air battery include lithium-air, aluminum-air and zinc-air. Despite the choice of metal electrode, oxygen reduction (ORR) occurs on the air electrode and oxidation occurs on the metal electrode. The oxidation of metal electrode is a relatively facile reaction compared to the ORR on the air electrode, making latter the limiting factor of the battery system. The sluggish ORR kinetics greatly affects the power output, efficiency, and lifetime of the metal air battery. One solution to this problem is the use of active, affordable and stable catalyst to promote the rate of ORR. Currently, platinum nanoparticles supported on conductive carbon (Pt/C) are the best catalyst for ORR. However, the prohibitively high cost and scarcity of platinum raise critical issues regarding the economic feasibility and sustainability of platinum-based catalysts. Cost reduction via the use of novel technologies can be achieved by two approaches. The first approach is to reduce platinum loading in the catalyst formulation. Alternatively platinum can be completely eliminated from the catalyst composition. The aim of this work is to identify and synthesize alternative catalysts for ORR toward metal air battery applications without the use of platinum or other precious metals (i.e., palladium, silver and gold). Non-precious metal catalysts (NPMC) have received immense international attentions owing to the enormous efforts in pursuit of novel battery and fuel cell technologies. Different types of NPMC such as transition metal alloys, transition metal or mixed metal oxides, chalcogenides have been investigated as potential contenders to precious metal catalysts. However, the performance and stability of these catalysts are still inferior in comparison. Nitrogen-doped carbon materials (NCM) are an emerging class of catalyst exhibiting great potential towards ORR catalysis. In comparison to the metal oxides, MCM show improved electrical conductivity. Furthermore, NCM exhibit higher activity compared to chalcogenides and transition metal alloys. Additional benefits of NCM include the abundance of carbon source and environmental benignity. Typical NCM catalyst is composed of pyrolyzed transition metal macrocycles supported by high surface area carbon. These materials have demonstrated excellent activity and stability. However, the degradation of these catalysts often involves the destruction of active sites containing the transition metal centre. To further improve the durability and mass transport of NCM catalyst, a novel class of ORR catalyst based on nitrogen-doped carbon nanotubes (NCNT) is investigated in a series of studies. The initial investigation focuses on the synthesis of highly active NCNT using different carbon-nitrogen precursors. This study investigated the effect of using cyclic hydrocarbon (pyridine) and aliphatic hydrocarbon (ethylenediamine) towards the formation and activity of NCNT. The innate structure of the cyclic hydrocarbon promotes the formation of NCNT to provide higher product yield; however, the aliphatic hydrocarbon promotes the formation of surface defects where the nitrogen atoms can be incorporated to form active sites for ORR. As a result, a significant increase in the ORR activity of 180 mV in half-wave potential is achieved when EDA was used as carbon-nitrogen precursor. In addition, three times higher limiting current density was observed for the NCNT synthesized from ethylenediamine. Based on the conclusion where highly active NCNT was produced from aliphatic hydrocarbon, similar carbon-nitrogen precursors with varying carbon to nitrogen ratio in the molecular structure (ethylenediamine, 1, 3-diaminopropane, 1, 4-diaminobutane) were adapted for the synthesis of NCNT. The investigation led to the conclusion that higher nitrogen to carbon ratio in the molecular structure of the precursors benefits the formation of active NCNT for ORR catalysis. The origin of such phenomena can be correlated with the higher relative nitrogen content of the resultant NCNT synthesized from aliphatic carbon precursor that provided greater nitrogen to carbon ratio. As the final nitrogen content increased in the molecular structure, the half-wave potential of the resultant NCNT towards ORR catalysis was increased by 120 mV. The significant improvement hints the critical role of nitrogen content towards ORR catalysis.

Download or read book Carbon Nanomaterials for Electrochemical Energy Technologies written by Shuhui Sun and published by CRC Press. This book was released on 2017-11-20 with total page 329 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers comprehensive coverage of carbon-based nanomaterials and electrochemical energy conversion and storage technologies such as batteries, fuel cells, supercapacitors, and hydrogen generation and storage, as well as the latest material and new technology development. It addresses a variety of topics such as electrochemical processes, materials, components, assembly and manufacturing, degradation mechanisms, challenges, and strategies. With in-depth discussions ranging from electrochemistry fundamentals to engineering components and applied devices, this all-inclusive reference offers a broad view of various carbon nanomaterials and technologies for electrochemical energy conversion and storage devices.