Results 211 to 220 of about 26,089 (260)

Proton conduction in some solids and the fuel cell with a proton conducting electrolyte

International Journal of Hydrogen Energy, 1979
Abstract The electrical conductivities of some organic and inorganic solids, such as the simple organic acids, NH4H2PO4, KH2PO4, H3BO3, λ-AIOOH, amine-sulfates and amine-phosphates, have been measured. A relatively high proton conductivity of about 1 × 10−3 ohm−1 cm−1 at 87°C was found in hexamethylenetetramine phosphate.
T TAKAHASHI, S TANASE, O YAMAMOTO, S YAMAUCHI, H KABEYA   +4 more
openaire   +1 more source

Proton conduction in zeolites

Materials Research Bulletin, 1982
Abstract Protonic conduction in zeolites is optimized. The approach is based on a vehicle-mechanism for the transport process. The parameters controlling protonic conduction are discussed. Fully hydrated “NH4-zeolite A” has a room temperature conductivity of 2×10 −3 Ω −1 cm −1 .
K.D. Kreuer, W. Weppner, A. Rabenau
openaire   +1 more source

Limits of Proton Conductivity

Angewandte Chemie International Edition, 2012
Parasitic current seems to be the cause for the "highest proton conductivity" of a material reported to date. Kreuer and Wohlfarth verify this hypothesis by measuring the conductivity of the same materials after preparing them in a different way. They further explain the limits of proton conductivity and comment on the problems of determining the ...
Kreuer, K., Wohlfarth, A.
openaire   +2 more sources

Construction of Successive Proton Conduction Channels to Accelerate the Proton Conduction Process in Flexible Proton Exchange Membranes

ACS Applied Materials & Interfaces
Successive proton conduction channels are constructed with the spin coating method in flexible proton exchange membranes (PEMs). In this research, phosphoric acid (PA) molecules are immobilized in the multilayered microstructure of Kevlar nanofibers and polystyrene-block-poly(ethylene-ran-butylene)-block-polystyrene (SEBS) polymer molecular chains.
Qingquan Li, Di Song, Weimin Gao, Dan Wu, Niuniu Zhang, Xinna Gao, Quantong Che   +6 more
openaire   +2 more sources

Protonic conductivity in hydrates

Solid State Ionics, 1988
The protonic conductivity of three acid hydrates, HUO2PO4·4H2O, Ce(HPO4)2·nH2O,V2O5·nH2O has been studied as a function of the partial pressure of water. The evolution of their conductivity is related to experimental water adsorption isotherms and to the theoretical Brunauer adsorption isotherms.
openaire   +1 more source

Protonic conduction in Ba2In2O5

Solid State Ionics, 1995
Abstract Protonic conduction in Ba 2 In 2 O 5 was studied by conductivity and EMF measurements as a function of temperature and oxygen activity. Evidence for protonic conduction was found in this material in moist atmospheres, especially at low temperatures.
openaire   +1 more source

Protonic conduction in BaIn0.5Sn0.5O2.75

Solid State Ionics, 1998
Abstract The synthesis and characterization by XRD and TEM of the compound BaIn 0.5 Sn 0.5 O 2.75 (BISO) is described. The water uptake was measured quantitatively as a function of temperature and water vapor pressure. For the standard enthalpy and entropy of solution the following values were obtained Δ H o =(−0.76±0.08) eV, Δ S o =(−1.22±0.13 ...
openaire   +1 more source

A comprehensive review on the proton conductivity of proton exchange membranes (PEMs) under anhydrous conditions: Proton conductivity upper bound

International Journal of Hydrogen Energy, 2021
Mohammad Bagher Karimi, Khadijeh Hooshyari, Parisa Salarizadeh   +2 more
exaly  

Proton Conductivity of Compositionally Graded Proton Conducting Oxides

Materials Science Forum, 2003
S. Yamaguchi, Takaaki Shishido, Mamoru Omori, A. Okubo, Satoru Yamamoto   +4 more
openaire   +1 more source

Optimizing the Proton Conductivity with the Isokinetic Temperature in Perovskite‐Type Proton Conductors According to Meyer–Neldel Rule

Advanced Energy Materials, 2022
Qianli Chen, Artur Braun
exaly