Journal ArticleDOI
Proton transport in some heteropolyacidhydrates a single crystal PFG-NMR and conductivity study
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TLDR
In this paper, single crystals of H3PW12O40·28H2O, H4SiW 12O40•28H 2O and H3pW12W40·21H 2 O have been prepared and the diffusion coefficients and conductivities have been determined for pure protonic as for partially deuterated samples.About:
This article is published in Solid State Ionics.The article was published on 1988-09-01. It has received 78 citations till now. The article focuses on the topics: Grotthuss mechanism & Proton transport.read more
Citations
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Journal ArticleDOI
Proton Conductivity: Materials and Applications
TL;DR: In this paper, a review of the proton conductivity in materials and the elements of proton conduction mechanisms are discussed with a special emphasis on proton chemistry, including structural reorganization and diffusional motion of extended moieties.
Journal ArticleDOI
Transport in proton conductors for fuel-cell applications: simulations, elementary reactions, and phenomenology.
TL;DR: Theoretical Methodologies and Simulation Tools, and Poisson−Boltzmann Theory, and Phenomenology of Transport inProton-Conducting Materials for Fuel-CellApplications46664.2.1.
Book ChapterDOI
Catalytic Chemistry of Heteropoly Compounds
TL;DR: The catalytic properties of heteropoly compounds have drawn wide attention, owing to the versatility of these compounds as catalysts, which has been demonstrated both by success in large-scale applications and by promising laboratory results as mentioned in this paper.
Journal ArticleDOI
Intermediate temperature proton conductors for PEM fuel cells based on phosphonic acid as protogenic group: A progress report
Hanna Steininger,M. Schuster,Klaus-Dieter Kreuer,Anke Kaltbeitzel,Bahar Bingöl,Wolfgang H. Meyer,Siri Schauff,Gunther Brunklaus,Joachim Maier,Hans Wolfgang Spiess +9 more
TL;DR: The results clearly indicate that the "spacer concept", which had been proven successful in the optimization of the proton conductivity of heterocycle based systems, fails and a very high concentration of phosphonic acid functional groups forming "bulky" hydrogen bonded aggregates is suggested to be essential for obtaining very high proton Conductivity.
Journal ArticleDOI
Proton-conducting polymer electrolytes and their applications in solid supercapacitors: a review
Han Gao,Keryn Lian +1 more
TL;DR: In this article, the authors provide an overview of the state-of-the-art solid supercapacitors enabled by proton-conducting polymer electrolytes and compare the performance and the technology gaps.
References
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Journal ArticleDOI
Spin diffusion measurements : spin echoes in the presence of a time-dependent field gradient
E. O. Stejskal,J. E. Tanner +1 more
TL;DR: In this article, a derivation of the effect of a time-dependent magnetic field gradient on the spin-echo experiment, particularly in the presence of spin diffusion, is given.
Journal ArticleDOI
High-conductivity solid proton conductors: Dodecamolybdophosphoric acid and dodecatungstophosphoric acid crystals.
TL;DR: The electrical conductivities of dodecamolybdophosphoric acid H3Mo12PO40·29H2O and dodecatungstophosphor acid H 3W12PO 40·29 H2O were measured in this article.
Journal ArticleDOI
Fast proton conduction in inorganic ion-exchange compounds
TL;DR: In this article, the ion exchange properties, densification under cold pressing, and protonic conduction are shown to have general application to other ion exchange materials, such as H3O+ ions.
Journal ArticleDOI
Temperature and humidity ranges of some hydrates of high-proton-conductive dodecamolybdophosphoric acid and dodecatungstophosphoric acid crystals under an atmosphere of hydrogen or either oxygen or air
TL;DR: In this article, a phase diagram of the hydration number of dodecamolybdophophophosphoric acid, H3Mo12PO40ṡmH2O, and dodecatungstophosphorus acid is presented in the phase diagrams.
Journal ArticleDOI
Investigation of H+ motion in the 21-hydrates of 12-tungstophosphoric and 12-molybdophosphoric acids by ac conductivity and pulsed 1H NMR measurements
TL;DR: In this article, 1 H NMR relaxation time measurements are reported for the heteropolyacids H 3 PM 12 O 40. 21 H 2 O (M = W, Mo) over a range of tempereatures.