New Electrode Materials and Active Energy Harvesting for Microbial Electrochemical Systems Or MXCS PDF Download

Author: Heming Wang
Publisher:
ISBN:
Category : Fuel cells
Languages : en
Pages : 141

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Author: Nicolas Brun
Publisher: World Scientific
ISBN: 178634355X
Category : Science
Languages : en
Pages : 658

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Book Description
Bioelectrochemical Systems (BESs) are innovative and sustainable devices. They combine biological and electrochemical processes to engineer sensors, treat wastewater and/or produce electricity, fuel or high-value chemicals. In BESs, scientists have managed to incorporate biological catalysts, i.e. enzymes and/or microorganisms, and make them work in advanced electrochemical cells. BESs operate under mild conditions — at close to ambient temperature and pressure and at circumneutral pH — and represent a sustainable alternative to precious metal-based systems. Incorporating biological catalysts into devices while maintaining their activity and achieving electrical communication with electrode surfaces is a critical challenge when trying to advance the field of BESs.From implantable enzymatic biosensors to microbial electrosynthesis, and from laboratory-scale systems and fundamental studies to marketed devices, this book provides a comprehensive overview of recent advances related to functional electrodes for BESs. Suitable for researchers and graduate students of chemistry, biochemistry, materials science and environmental science and technology.

Author: Makarand M. Ghangrekar
Publisher: John Wiley & Sons
ISBN: 3527838996
Category : Technology & Engineering
Languages : en
Pages : 873

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Book Description
A one-stop guide to the future of sustainable energy production The search for sustainable energy sources powered by renewable, non-fossil fuel resources is one of the great scientific challenges of the era. Microorganisms such as bacteria and algae have been shown to function as the basis of a microbial fuel cell, which can operate independently of an electrical power grid on the basis of renewable feed sources. These fuel cells have shown applications ranging from powering implantable biomedical devices to purifying rural water sources, and many more. Microbial Electrochemical Technologies offers a one-stop shop for researchers and developers of technologies incorporating these microbial fuel cells. Beginning with the fundamental processes involved in microbial energy production and the key components of a bioelectrochemical system (BES), it then surveys the major BES types and crucial aspects of technological development and commercialization. The result is an indispensable introduction to these vital power sources and their myriad applications. Microbial Electrochemical Technologies readers will also find: Detailed treatment of BES types including fuel cells, electrolysis and electrosynthesis cells, and more Discussion of commercialization aspects including modelling, performance analysis, and life cycle assessment An authorial team with decades of combined experience on three continents Microbial Electrochemical Technologies is a useful reference for electrochemists, microbiologists, biotechnologists, and bioengineers.

Author: Aneeya Kumar Samantara
Publisher: CRC Press
ISBN: 1000764176
Category : Science
Languages : en
Pages : 361

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Book Description
This new volume discusses new and well-known electrochemical energy harvesting, conversion, and storage techniques. It provides significant insight into the current progress being made in this field and suggests plausible solutions to the future energy crisis along with approaches to mitigate environmental degradation caused by energy generation, production, and storage. Topics in Electrochemical Energy Conversion and Storage Systems for Future Sustainability: Technological Advancements address photoelectrochemical catalysis by ZnO, hydrogen oxidation reaction for fuel cell application, and miniaturized energy storage devices in the form of micro-supercapacitors. The volume looks at the underlying mechanisms and acquired first-hand information on how to overcome some of the critical bottlenecks to achieve long-term and reliable energy solutions. The detailed synthesis processes that have been tried and tested over time through rigorous attempts of many researchers can help in selecting the most effective and economical ways to achieve maximum output and efficiency, without going through time-consuming and complex steps. The theoretical analyses and computational results corroborate the experimental findings for better and reliable energy solutions.

Author: Menna Tullah Samir Said
Publisher:
ISBN:
Category : Clean energy
Languages : en
Pages : 107

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Abstract: Over the past two decades, earth has witnessed a seminal growth in the global energy consumption rates accompanied by drastic Carbon dioxide emissions in the atmosphere. Recent callings for sustainable energy systems that can offset the carbon footprint made it inevitable to develop technologies that provide clean fuel alternatives to fossil fuels. Hydrogen can be that alternative as it is an it only produces water as a byproduct during combustion. However current commercial hydrogen production practices are energy consuming, and get their energy from fossil fuels. Solar energy, can be harvested with semiconducting materials. Consequently, it became of great necessity to develop semiconducting electrodes that can efficiently convert solar energy to electrical energy used in the splitting of water for the production of hydrogen. In the first part of this thesis, earth abundant metal, Titanium (Ti), was used to design electrodes that provide the reaction surface upon which water is split into Hydrogen. On a different note, the current commercial energy storage devices still face performance limitations, have high maintenance cost, and are not eco-friendly. Electrochemical supercapacitors hold the potential of being the next generation of efficient and clean energy storing devices. Their fast charge/discharge rates make them the perfect storing devices for peak power delivery applications contrary to batteries. However, supercapacitors are still underdevelopment and face major challenges such as relatively low energy density, performance degradation, and high cost. In order to overcome these limitations a lot of research is carried on the design of efficient, cheap, and stable electrode materials. The emergence of transition metal oxides as an active material for solar cells have encouraged the research of using them as electrode materials for supercapacitors. New strategies are developed for the fabrication of nanostructured mixed oxides fibers, incorporated with carbon based materials. These methods are expected to improve the capacitive performance and cyclic stability of the metal oxides electrodes. In the second part of the thesis, we propose a synthesis route for the fabrication of binder-free Manganese and Vanadium mixed oxides nanofibers electrodes for supercapacitors.

Author: Nicolas Brun
Publisher:
ISBN: 9781786343543
Category : TECHNOLOGY & ENGINEERING
Languages : en
Pages : 643

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Book Description
"Bioelectrochemical Systems (BESs) are innovative and sustainable devices. They combine biological and electrochemical processes to engineer sensors, treat wastewater and/or produce electricity, fuel or high-value chemicals. In BESs, scientists have managed to incorporate biological catalysts, i.e. enzymes and/or microorganisms, and make them work in advanced electrochemical cells. BESs operate under mild conditions -- at close to ambient temperature and pressure and at circumneutral pH -- and represent a sustainable alternative to precious metal-based systems. Incorporating biological catalysts into devices while maintaining their activity and achieving electrical communication with electrode surfaces is a critical challenge when trying to advance the field of BESs. From implantable enzymatic biosensors to microbial electrosynthesis, and from laboratory-scale systems and fundamental studies to marketed devices, this book provides a comprehensive overview of recent advances related to functional electrodes for BESs. Suitable for researchers and graduate students of chemistry, biochemistry, materials science and environmental science and technology."--Publisher's website.

Author: Zhichao Shan
Publisher:
ISBN:
Category : Electronic dissertations
Languages : en
Pages : 163

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Book Description
This dissertation presents surface enhanced photoanodes and oxygen evolution reaction (OER) catalysts for solar water splitting to produce hydrogen. The enhancement could be achieved by either introduced surface plasmon enhanced metallic nanostructures, such as Au or Ag nanoparticles, or adjusted surface structure, chemical composition and band structure of TiO2. This dissertation also presents various electrochemical and spectroscopic techniques used to characterize nanostructured materials for solar water splitting reactions. Firstly, a model photoanode comprised of Ag@Ag2S core-shell nanoparticles (NPs) on a nanostructured TiO2 substrate is presented for visible light sensitive photoelectrochemical properties. The nanostructured electrode is coated with TiO2 nanowires (NW) on Ti plate to provide a high surface area for efficient light absorption and efficient charge collection from Ag@Ag2S NPs. Pronounced photoelectrochemical responses of Ag@Ag2S NPs under visible light responses were obtained. These responses were attributed to collective contributions of local surface plasmon enhancement, enhanced charge collection by Ti@TiO2 NWs, and high surface area of the nanostructured electrode system. The shell thickness and core size of the Ag@Ag2S core-shell structure can be controlled and the optimal photoelectrochemical performance with a core size of 17 nm (in diameter) and shell thickness of 8 nm was formed. Secondly, a Au@CdS/Ti@TiO2 nanostructured photoanode was prepared by decorating a CdS thin film layer onto a Au/Ti@TiO2 NWs substrate. Compared to CdS/Ti@TiO2 NWs photoanode, Au@CdS/Ti@TiO2 exhibits a significant enhancement to water splitting efficiency. iii The enhanced photoelectrochemical catalytic activity is attributed to the surface plasmon enhancement of Au nanoparticles. XPS, XRD, SEM, EDS, high resolution TEM, AC impedance and other electrochemical methods were applied to resolve the structure-function relationship of the nanostructures of Ag@Ag2S/Ti@TiO2 NWs and Au@CdS/Ti@TiO2 NWs electrodes. The studies of the photocatalytic activity of the core-shell structure, as well as a core-shell structure predictive model can further improve the understanding of the interplay between the shell thickness and core size and guide the design of highly efficient core-shell materials. Lastly, chapter 5 of this dissertation presents a high efficiency, durable, and low-cost oxygen evolution reaction (OER) catalyst based on earth-abundant elements, carbon, oxygen, and titanium for renewable energy conversion and storage devices. In this study, we report a highly active nanostructured electrode NanoCOT (C, O and Ti) for an efficient OER in alkaline solution. The NanoCOT electrode is synthesized from the carbon transformation of nanostructured TiO2 in an atmosphere of methane, hydrogen and nitrogen by a CVD process. The NanoCOT exhibits highly enhanced OER catalytic activity in alkaline solution, providing a current density of 1.33 mA/cm2 at an overpotential of 0.42 V, which is about 4 times higher than an IrO2 electrode and 15 times higher than a Pt electrode because of its nanostructured high surface area and favorable OER kinetics. The enhanced OER catalytic activity of NanoCOT is attributed to the presence of a continuous energy band of the titanium oxide electrode with predominantly reduced defect states of Ti (e.g., Ti1+, Ti2+ and Ti3+) formed by chemical reduction with hydrogen and carbon. OER performance of NanoCOT can also be further enhanced by decreasing its overpotential 150 mV at a current density of 1.0 mA/cm2 after coating its surface electrophoretically with 2.0 nm IrOx nanoparticles (NPs).

Author: Falk Harnisch
Publisher: Springer
ISBN: 303003299X
Category : Science
Languages : en
Pages : 420

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Book Description
This volume discusses both the latest experimental research in bioelectrosynthesis and current applications. Beginning with an introduction into the “electrification of biotechnology” as well as the underlying fundamentals, the volume then discusses a wide range of topics based on the interfacing of biotechnological and electrochemical reaction steps. It includes contributions on the different aspects of bioelectrochemical applications for synthesis purposes, i.e. the production of fine and platform chemicals based on enzymatically or microbially catalyzed reactions driven by electric energy. The volume finishes with a summary and outlook chapter which gives an overview of the current status of the field and future perspectives. Edited by experts in the field, and authored by a wide range of international researchers, this volume assesses how research from today’s lab bench can be developed into industrial applications, and is of interest to researchers in academia and industry.

Author: Heather R. Luckarift
Publisher: John Wiley & Sons
ISBN: 1118869737
Category : Technology & Engineering
Languages : en
Pages : 540

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Book Description
Summarizes research encompassing all of the aspects required to understand, fabricate and integrate enzymatic fuel cells Contributions span the fields of bio-electrochemistry and biological fuel cell research Teaches the reader to optimize fuel cell performance to achieve long-term operation and realize commercial applicability Introduces the reader to the scientific aspects of bioelectrochemistry including electrical wiring of enzymes and charge transfer in enzyme fuel cell electrodes Covers unique engineering problems of enzyme fuel cells such as design and optimization

Author: Sonia M. Tiquia-Arashiro
Publisher: CRC Press
ISBN: 0429944993
Category : Science
Languages : en
Pages : 497

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Book Description
This book encompasses the most updated and recent account of research and implementation of Microbial Electrochemical Technologies (METs) from pioneers and experienced researchers in the field who have been working on the interface between electrochemistry and microbiology/biotechnology for many years. It provides a holistic view of the METs, detailing the functional mechanisms, operational configurations, influencing factors governing the reaction process and integration strategies. The book not only provides historical perspectives of the technology and its evolution over the years but also the most recent examples of up-scaling and near future commercialization, making it a must-read for researchers, students, industry practitioners and science enthusiasts. Key Features: Introduces novel technologies that can impact the future infrastructure at the water-energy nexus. Outlines methodologies development and application of microbial electrochemical technologies and details out the illustrations of microbial and electrochemical concepts. Reviews applications across a wide variety of scales, from power generation in the laboratory to approaches. Discusses techniques such as molecular biology and mathematical modeling; the future development of this promising technology; and the role of the system components for the implementation of bioelectrochemical technologies for practical utility. Explores key challenges for implementing these systems and compares them to similar renewable energy technologies, including their efficiency, scalability, system lifetimes, and reliability.