Solid State Proton Conductors: Properties and Applications by Philippe Knauth, Visit Amazon's Maria Luisa Di Vona Page,

By Philippe Knauth, Visit Amazon's Maria Luisa Di Vona Page, search results, Learn about Author Central, Maria Luisa Di Vona,

Proton conduction are available in lots of various reliable fabrics, from natural polymers at room temperature to inorganic oxides at extreme temperature. sturdy kingdom proton conductors are of relevant curiosity for plenty of technological recommendations, together with hydrogen and humidity sensors, membranes for water electrolyzers and, most significantly, for high-efficiency electrochemical strength conversion in gasoline cells.

concentrating on basics and physico-chemical houses of strong nation proton conductors, themes lined include:

  • Morphology and constitution of stable Acids
  • Diffusion in stable Proton Conductors via Nuclear Magnetic Resonance Spectroscopy
  • Structure and Diffusivity by means of Quasielastic Neutron Scattering
  • Broadband Dielectric Spectroscopy
  • Mechanical and Dynamic Mechanical research of Proton-Conducting Polymers
  • Ab initio Modeling of delivery and constitution
  • Perfluorinated Sulfonic Acids
  • Proton-Conducting fragrant Polymers
  • Inorganic stable Proton Conductors

Uniquely combining either natural (polymeric) and inorganic proton conductors, Solid country Proton Conductors: homes and purposes in gas Cells presents an entire remedy of analysis on proton-conducting materials.

Content:
Chapter 1 advent and evaluate: Protons, the Nonconformist Ions (pages 1–4): Maria Luisa Di Vona and Philippe Knauth
Chapter 2 Morphology and constitution of sturdy Acids (pages 5–24): Habib Ghobarkar, Philippe Knauth and Oliver Schaf
Chapter three Diffusion in reliable Proton Conductors: Theoretical facets and Nuclear Magnetic Resonance research (pages 25–70): Maria Luisa Di Vona, Emanuela Sgreccia and Sebastiano Tosto
Chapter four constitution and Diffusivity in Proton?Conducting Membranes Studied via Quasielastic Neutron Scattering (pages 71–108): Rolf Hempelmann
Chapter five Broadband Dielectric Spectroscopy: a strong software for the selection of cost move Mechanisms in Ion Conductors (pages 109–183): Vito Di Noto, Guinevere A. Giffin, Keti Vezzu, Matteo Piga and Sandra Lavina
Chapter 6 Mechanical and Dynamic Mechanical research of Proton?Conducting Polymers (pages 185–240): Jean?Francois Chailan, Mustapha Khadhraoui and Philippe Knauth
Chapter 7 Ab Initio Modeling of delivery and constitution of reliable kingdom Proton Conductors (pages 241–294): Jeffrey okay. Clark and Stephen J. Paddison
Chapter eight Perfluorinated Sulfonic Acids as Proton Conductor Membranes (pages 295–329): Giulio Alberti, Riccardo Narducci and Maria Luisa Di Vona
Chapter nine Proton Conductivity of fragrant Polymers (pages 331–369): Baijun Liu and Michael D. Guiver
Chapter 10 Inorganic strong Proton Conductors (pages 371–397): Philippe Knauth and Maria Luisa Di Vona

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Additional resources for Solid State Proton Conductors: Properties and Applications in Fuel Cells

Sample text

5 corresponds to a spin echo sequence. Two magnetic field gradient pulses are applied in the experiment to know the effects of translational motion on the signal intensity. A detailed description is given by Price [20] and others [21]; we can essentially observe that if no diffusion takes place, the maximum signal is obtained. However, if diffusion takes place, the diffusing nucleus will feel a change in the magnetic field and in the resulting phase it experiences, and the signal will be reduced.

1b). The static field B0 and the perturbing radiofrequency field (o1) are usually designed orthogonal to each other to maximize the absorption signal strength. From an experimental point of view, a useful technique is that of irradiating the sample with a radiofrequency pulse (rf) around the Larmor frequency of the nuclei to be investigated; the excitation energy causes the macroscopic magnetization vector P M ¼ i Si , the vector sum resultant from all microscopic spins Si , to rotate around B1. 1c).

G. g. field inhomogeneities of the main magnetic field) to the examined object. The slower moving components of Mxy appear to move counter-clockwise, while the faster moving components appear to move clockwise. At time t after the p pulse, the magnetization refocuses along the negative x or y axis. The dephasing and rephasing of the magnetization along the x or y axis are known as spin echoes. The intensity of the echo relative to the initial signal will depend on T2 according to: Mxy ¼ M0 exp À t=T2 ð3:41Þ In the PGSE-NMR measurements, a pair of symmetrically spaced field gradient pulses, instead of the steady gradient, is applied onto a standard spin echo sequence.

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