scholarly journals Alkali metals as efficient A-site acceptor dopants in proton conducting BaZrO3

2016 ◽  
Vol 4 (23) ◽  
pp. 9229-9235 ◽  
Author(s):  
Andreas Løken ◽  
Sarmad W. Saeed ◽  
Marit N. Getz ◽  
Xin Liu ◽  
Tor S. Bjørheim
Keyword(s):  
Proton Conductivity ◽  
Alkali Metals ◽  
Acceptor Doping ◽  
Present Contribution ◽  
Proton Conducting ◽  
A Site

The present contribution demonstrates that A-site acceptor doping of BaZrO3 by alkali metals may significantly enhance its bulk proton conductivity compared to that of Y-doped BaZrO3.

Acceptor doping in the proton conductor SrZrO3

2017 ◽  
Vol 19 (18) ◽  
pp. 11485-11491 ◽  
Author(s):  
Leigh Weston ◽  
A. Janotti ◽  
X. Y. Cui ◽  
C. Stampfl ◽  
C. G. Van de Walle
Keyword(s):  
Proton Conductivity ◽  
Proton Conductor ◽  
Acceptor Doping ◽  
Proton Conducting ◽  
Conducting Oxides

Acceptor dopants in proton-conducting oxides act as proton traps, or can accidentally incorporate as donors, reducing proton conductivity.

Proton Conducting Compound of Benzimidazole with Sebacic Acid: Structure, Molecular Dynamics, and Proton Conductivity

2014 ◽  
Vol 14 (3) ◽  
pp. 1211-1220 ◽  
Author(s):  
Adam Rachocki ◽  
Katarzyna Pogorzelec-Glaser ◽  
Paweł Ławniczak ◽  
Maria Pugaczowa-Michalska ◽  
Andrzej Łapiński ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Proton Conductivity ◽  
Sebacic Acid ◽  
Proton Conducting ◽  
Acid Structure

scholarly journals Proton-conducting Organic-inorganic Sulfo-containing Membranes for Fuel Cell

2021 ◽  
Author(s):  
Inga GRIGORAVICIUTE-PURONIENE ◽  
Iryna YEVCHUK ◽  
Oksana DEMCHYNA ◽  
Mariia ZHYHAILO ◽  
Khrystyna RYMSHA ◽  
...  
Keyword(s):  
Proton Conductivity ◽  
Sol Gel ◽  
Structural Heterogeneity ◽  
Silica Content ◽  
Inorganic Materials ◽  
Inorganic Component ◽  
Proton Conducting ◽  
Glycol Diacrylate ◽  
Silica Membranes ◽  
Component Content

Cross-linked organiс-inorganic sulfo-containing membranes of various compositions based on acrylic monomers (acrylonitrile, acrylic acid, 3-sulfopropylacrylate potassium salt, ethylene glycol diacrylate) and sol-gel systems of tetraethoxysilane have been developed. Synthesis of the polymer matrix was carried out by UV-initiated polymerization of the monomer mixture and the inorganic component was formed in situ while conducting the sol-gel process of the precursor. FTIR, SEM, EDS, DMA, impedance spectroscopy were used to characterize the synthesized materials. The influence of inorganic component content on the properties of the membranes was investigated. DMA results show that an increase in silica content leads to a decrease in packing density and an increase in structural heterogeneity in sulfo-containing polyacrylate/silica membranes. The highest values of proton conductivity 1.12 ꞏ 10−2 Sm/cm at 60 °C were found in membranes containing 3 wt.%. of the added sol-gel system. Further increase of silica content does not increase the proton conductivity of the membranes. The proton transfer activation energies in the membranes were calculated from the temperature dependence of proton conductivity. The obtained cross-linked sulfo-containing organic-inorganic materials can be used for the development of proton-conducting membranes for fuel cells.

scholarly journals ELECTRO-OSMOTIC FRACTIONATION OF HYDROGEN ISOTOPES IN ELECTROLYTIC SOLUTIONS USING COMPOSITE PROTON-PERMEABLE MEMBRANES

2021 ◽  
pp. 11-16
Author(s):  
O. Pushkar'ov ◽  
A. Zubko ◽  
I. Sevruk ◽  
V. Dolin
Keyword(s):  
Hydrogen Bonds ◽  
Proton Conductivity ◽  
Tritiated Water ◽  
High Mobility ◽  
Hydrogen Isotopes ◽  
Water Molecules ◽  
Proton Conducting ◽  
Partial Dissociation ◽  
Surface Modified ◽  
Conducting Membranes

Based on the analysis of the features of electroosmotic processes that are implemented in proton-conducting membranes, the possibility of fractioning hydrogen isotopes in electrolytes formed using tritiated water (HTO) is estimated. The interaction of the solution with the membranes in their channels leads to polarization and partial dissociation of the electrolyte molecules. In water molecules, when protium is replaced by a heavy isotope of hydrogen, the energy of breaking of hydrogen bonds increases and the process of their dissociation proceeds predominantly according to the scheme: HTO ↔ H+ + TO—. A part of the released protons can join water molecules to form the H3O+ ion. H3O+ and TO— ions are more mobile than other singly charged ions. The main characteristic that determines the suitability of electroosmotic membranes to the fractionation of hydrogen isotopes is proton conductivity. The released protons have anomalously high mobility due to their small size, tunnel and relay movement through hydrogen bonds between adjacent polar groups in the channels of the proton-conducting membranes. To ensure high proton conductivity in the pores and channels of the membranes, modifying substances are fixed, which contain the groups: –ОН- , –NH2, –NH, –SH, –COOH, –SO3H, acid salts and oxides, containing surface proton-conducting groups. To create proton-conducting membranes, it is possible to use surface-modified β-alumina (β-Al2O3(H3O+)) and protonated (H3O+) montmorillonite with ionic conductivity (5х103 – 4х104 Ohm х cm–1). The most effective are surface modifiers with negatively charged sulfonic groups. The imposition of an external electric field leads to the movement of ions in the electrolyte, which leads to a redistribution of the isotope ratio in the near-anode and cathode spaces.

scholarly journals Fabrication of multi-layered structures for proton conducting ceramic cells

2021 ◽  
Author(s):  
Wendelin Deibert ◽  
Mariya E. Ivanova ◽  
Yuanye Huang ◽  
Rotraut Merkle ◽  
Joachim Maier ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Proton Conductivity ◽  
Phase Formation ◽  
Tape Casting ◽  
Transient Liquid Phase ◽  
Layered Structures ◽  
Proton Conducting

We show manufacturing of 25 cm2 BZCY half-cells by tape-casting of assemblies with electrolyte thickness 10–20 μm. BaY2NiO5 transient liquid phase formation is analysed and proton conductivity with values of σ = 0.003 S cm−1 at 600 °C is shown.

Ground to conduct: mechanochemical synthesis of a metal–organic framework with high proton conductivity

2015 ◽  
Vol 51 (36) ◽  
pp. 7637-7640 ◽  
Author(s):  
Dariusz Matoga ◽  
Marcin Oszajca ◽  
Marcin Molenda
Keyword(s):  
Proton Conductivity ◽  
Mechanochemical Synthesis ◽  
Metal Organic Framework ◽  
Environmentally Friendly ◽  
High Proton Conductivity ◽  
Proton Conducting ◽  
High Proton ◽  
Metal Organic ◽  
First Time ◽  
Organic Framework

A high proton-conducting metal–organic framework (PCMOF) is prepared for the first time by economical and environmentally-friendly mechanochemistry.

Proton Conductivity of Compositionally Graded Proton Conducting Oxides

2003 ◽  
Vol 423-425 ◽  
pp. 441-444
Author(s):  
S. Yamaguchi ◽  
Takaaki Shishido ◽  
Mamoru Omori ◽  
A. Okubo ◽  
Satoru Yamamoto
Keyword(s):  
Proton Conductivity ◽  
Proton Conducting ◽  
Conducting Oxides

Superprotonic conduction through one-dimensional ordered alkali metal ion chains in a lanthanide-organic framework

2018 ◽  
Vol 54 (35) ◽  
pp. 4429-4432 ◽  
Author(s):  
Xia Wang ◽  
Yanlong Wang ◽  
Mark A. Silver ◽  
Daxiang Gui ◽  
Zhuanling Bai ◽  
...  
Keyword(s):  
Activation Energy ◽  
Alkali Metal ◽  
Proton Conductivity ◽  
Metal Ion ◽  
Alkali Metal Ion ◽  
Proton Conducting ◽  
One Dimensional ◽  
Organic Framework

An ultrahigh proton conductivity of 2.91 × 10−2 S cm−1 and an ultralow activation energy of 0.10 eV were observed in an anionic lanthanide-organic framework. Both values approach the records for proton-conducting MOF materials.

Sign in / Sign up

Export Citation Format

Share Document