Electrochemical Reduction of Oxygen on Quinone-modified Carbon Electrodes and on Thin Films of Platinum and Gold PDF Download
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Author: Ave Sarapuu
Publisher:
ISBN:
Category : Electrodes, Carbon
Languages : en
Pages : 148
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Author: Ave Sarapuu
Publisher:
ISBN:
Category : Electrodes, Carbon
Languages : en
Pages : 148
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Book Description
Author:
Publisher:
ISBN: 9789949118779
Category : Electrodes, Carbon
Languages : en
Pages : 133
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Author: Ayesha Kausar
Publisher: Elsevier
ISBN: 0128224649
Category : Technology & Engineering
Languages : en
Pages : 308
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Book Description
Conducting Polymer-Based Nanocomposites: Fundamentals and Applications delivers an up-to-date overview on cutting-edge advancements in the field of nanocomposites derived from conjugated polymeric matrices. Design of conducting polymers and resultant nanocomposites has instigated significant addition in the field of modern nanoscience and technology. Recently, conducting polymer-based nanocomposites have attracted considerable academic and industrial research interest. The conductivity and physical properties of conjugated polymers have shown dramatic improvement with nanofiller addition. Appropriate fabrication strategies and the choice of a nanoreinforcement, along with a conducting matrix, may lead to enhanced physicochemical features and material performance. Substantial electrical conductivity, optical features, thermal stability, thermal conductivity, mechanical strength, and other physical properties of the conducting polymer-based nanocomposites have led to high-performance materials and high-tech devices and applications. This book begins with a widespread impression of state-of-the-art knowledge in indispensable features and processing of conducting polymer-based nanocomposites. It then discusses essential categories of conducting polymer-based nanocomposites such as polyaniline, polypyrrole, polythiophene, and derived nanomaterials. Subsequent sections of this book are related to the potential impact of conducting polymer-based nanocomposites in various technical fields. Significant application areas have been identified for anti-corrosion, EMI shielding, sensing, and energy device relevance. Finally, the book covers predictable challenges and future opportunities in the field of conjugated nanocomposites. Integrates the fundamentals of conducting polymers and a range of multifunctional applications Describes categories of essential conducting polymer-based nanocomposites for polyaniline, polypyrrole, polythiophene, and derivative materials Assimilates the significance of multifunctional nanostructured materials of nanocomposite nanofibers Portrays current and future demanding technological applications of conjugated polymer-based nanocomposites, including anti-corrosion coatings, EMI shielding, sensors, and energy production and storage devices
Author:
Publisher:
ISBN:
Category : Chemical abstracts
Languages : en
Pages : 2600
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Author:
Publisher:
ISBN:
Category : Electronic journals
Languages : en
Pages : 628
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Monthly. Papers presented at recent meeting held all over the world by scientific, technical, engineering and medical groups. Sources are meeting programs and abstract publications, as well as questionnaires. Arranged under 17 subject sections, 7 of direct interest to the life scientist. Full programs of meetings listed under sections. Entry gives citation number, paper title, name, mailing address, and any ordering number assigned. Quarterly and annual indexes to subjects, authors, and programs (not available in monthly issues).
Author: Hari Singh Nalwa
Publisher: Wiley-Blackwell
ISBN:
Category : Science
Languages : en
Pages : 930
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Book Description
Conductive polymers--polymers that conduct electricity--have applications in telecommunications, electronics, materials science, chemistry and physics. The four self-contained volumes of this handbook thoroughly explore all aspects of conductive polymers including chemical and physical properties, technology and applications.
Author: Oliver A Williams
Publisher: Royal Society of Chemistry
ISBN: 1849737614
Category : Science
Languages : en
Pages : 530
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Book Description
The exceptional mechanical, optical, surface and biocompatibility properties of nanodiamond have gained it much interest. Exhibiting the outstanding bulk properties of diamond at the nanoscale in the form of a film or small particle makes it an inexpensive alternative for many applications. Nanodiamond is the first comprehensive book on the subject. The book reviews the state of the art of nanodiamond films and particles covering the fundamentals of growth, purification and spectroscopy and some of its diverse applications such as MEMS, drug delivery and biomarkers and biosensing. Specific chapters include the theory of nanodiamond, diamond nucleation, low temperature growth, diamond nanowires, electrochemistry of nanodiamond, nanodiamond flexible implants, and cell labelling with nanodiamond particles. Edited by a leading expert in nanodiamonds, this is the perfect resource for those new to, and active in, nanodiamond research and those interested in its applications.
Author:
Publisher:
ISBN:
Category : Physics
Languages : en
Pages : 1272
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Author: Andy Yun-Cheng Lin
Publisher: Stanford University
ISBN:
Category :
Languages : en
Pages : 208
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Book Description
Solid oxide fuel cells (SOFCs) have long offered promise of renewable and highly efficient direct chemical to electrical energy conversion, though their high cost and operating temperatures have limited commercial adoption and applications. Recently, research efforts have focused on reducing the operating temperature by thinning the fuel cell membrane, thereby eliminating the requirement of high-temperature (800∘C to 1000∘C) compatible ceramic electrodes, and allowing the use of more traditional metallic catalysts that were previously limited to lower temperature fuel cell types due to materials compatibility constraints. However, because these operating temperatures (400∘C to 600∘C) remain much higher than those found in low temperature fuel cells, the morphological stability of these metallic catalytic electrodes at these intermediate temperatures is a critical factor impacting fuel cell performance. Our first study investigates the morphological stability of mesoporous platinum thin films deposited via nanosphere lithography on yttria-stabilized zirconia (YSZ). Carboxylate-modified polystyrene nanospheres were spin-coated onto YSZ substrates, diameter-reduced via reactive ion etching, and used as a shadow mask for e-beam platinum deposition. The spheres were then removed by sonication, leaving behind a hexagonal close-packed array of holes in the Pt film. Hole diameters were measured pre- and post-annealing in 5% forming gas and pure oxygen environments, mimicking the anode and cathode environments, respectively, of a fuel cell. Annealing temperatures and times were varied, and the hole evolution model by Srolovitz and Safran was used to extract an activation energy for platinum surface diffusion under each annealing environment. Calculated activation energies were 1.16 eV and 1.22 eV for forming gas and oxygen environments, respectively, with a slightly smaller diffusion prefactor for the latter environment. Our second study evaluates the performance of these mesoporous platinum films as SOFC electrodes. We compare the mesoporous platinum films to standard nanoporous platinum electrodes, using simple SOFC devices with 100 μm thick polycrystalline YSZ as the electrolytes. Four electrode configurations were investigated (noted as cathode-anode): nano-nano, meso-nano, nano-meso, and meso-meso. SEM images of the electrodes before and after testing are compared. We also evaluated the electrical performance of the electrodes by measuring current output as a function of time at constant voltage, current as a function of voltage, and impedance spectra pre- and post-constant voltage testing. The data suggest that, for these devices and operating conditions, oxygen reduction kinetics and cathode triple phase boundary lengths are the main factors limiting performance. Devices with nanoporous cathodes exhibited higher absolute current density compared to devices with mesoporous cathodes. The nanoporous cathode devices also exhibited decreasing current at constant voltage over time, whereas the mesoporous cathode devices reached a stable current after approximately 5 h. SEM images show that the nanoporous electrodes underwent significant morphological change during testing, as compared to the mesoporous electrodes and impedance spectra quantitatively show that the nanoporous cathode devices exhibit greater resistance increase after testing than the mesoporous cathode devices.
Author:
Publisher:
ISBN:
Category : Electronic journals
Languages : en
Pages : 1808
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