Journal ArticleDOI
Electrical conductivities of some hydrates of dodecamolybdophosphoric acid and dodecatungstophosphoric acid and their mixed crystals
Osamu Nakamura,I Ogino +1 more
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In this paper, the temperature dependence of electrical conductivities of dodecamolybdophophosphoric acid (MPA) and dodecatungstophosphric acid (WPA), and their mixed crystals (MWPA) are observed.About:
This article is published in Materials Research Bulletin.The article was published on 1982-02-01. It has received 43 citations till now.read more
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Heterogeneous catalysis by heteropoly compounds of molybdenum and tungsten
TL;DR: In this article, the authors defined heteropoly acids as polymeric oxoanions which are formed by the condensation of more than two different oxo-oanions [Eq. (1)l.
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Proton conducting composite membranes from polyether ether ketone and heteropolyacids for fuel cell applications
Syed Javaid Zaidi,Serguei D. Mikhailenko,Gilles P. Robertson,Michael D. Guiver,Serge Kaliaguine +4 more
TL;DR: In this paper, a series of composite membranes based on sulfonated polyether ether ketone with embedded heteropolycompounds were studied and their electrochemical and thermal properties were studied, showing that an increase in degree of sulfonation and introduction of these fillers resulted in increased Tg and enhanced membrane hydrophilicity, bringing about a substantial gain in proton conductivity.
Journal ArticleDOI
Chitosan biopolymer for fuel cell applications.
Jia Ma,Yogeshwar Sahai +1 more
TL;DR: In this article, the structure and properties of chitosan with respect to its applications in fuel cells are reviewed and recent achievements and prospect of its applications have also been included.
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Mixed matrix proton exchange membranes for fuel cells: State of the art and perspectives
TL;DR: Proton-conducting mixed matrix membranes (PC-MMMs) have received considerable interest as promising materials that combine the properties of, and create synergism from interactions between, polymeric and inorganic components.
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Membranes based on phosphotungstic acid and polybenzimidazole for fuel cell application
TL;DR: Composite membranes based on PWA adsorbed on silica (SiO2) and polybenzimidazole (PBI) have been prepared and their physico-chemical properties have been studied as discussed by the authors.
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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
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
The water content and humidity ranges of dodecamolybdophosphoric acid and dodecatungstophosphoric acid crystals
Osamu Nakamura,I Ogino,T. Kodama +2 more
TL;DR: The water content of dodecamolybdophophosphoric acid H 3 Mo 12 PO 40 ·29H 2 O and dodecatungstophosphorous acid (DBA) H 3 W 12 PO40 ·29 H 2 O crystals were redetermined to be 29 molecules per formula unit as discussed by the authors.