Proton transfer in polyamine–P2Mo5 model adducts: exploring the effect of polyamine cations on their proton conductivity

2020 ◽  
Vol 49 (47) ◽  
pp. 17301-17309
Author(s):  
Shan Zhang ◽  
Ying Lu ◽  
Xiuwei Sun ◽  
Zhuo Li ◽  
Tianyi Dang ◽  
...  
Keyword(s):  
Proton Transfer ◽  
Proton Conductivity ◽  
Proton Conductors

Polyamine–P2Mo5 model proton conductors composed of different polyamine cations and [HxP2Mo5O23](6−x)− (x = 0, 1, 2) anions were established.

Fast Proton Conductors from Inorganic-Organic Composites: I. Amorphous Phosphate-Nafion and Silicophosphate-PMA/PWA Hybrids

1999 ◽  
Vol 600 ◽  
Author(s):  
Yong-Il Park ◽  
Jae-Dong Kim ◽  
Masayuki Nagai
Keyword(s):  
Phosphoric Acid ◽  
Proton Conductivity ◽  
Proton Conductors ◽  
Phosphorus Concentration ◽  
High Proton ◽  
Proton Source ◽  
Drastic Increase ◽  
Amorphous Phosphate ◽  
Exchange Resins ◽  
Very High

AbstractA drastic increase of electrical conductivity was observed in the composite of amorphous phosphate and ion-exchange resins (Nafion) as phosphorus concentration increased. Incorporation of amorphous phosphate into Nafion caused a large increase of conductivity to about 4×10−1S/cm at 23°C. However, the fabricated composite showed very low chemical stability.A high proton conductivity was also observed in a new inorganic-organic hybrids through incorporating PMA(molibdo-phosphoric acid)/PWA(tungsto-phosphoric acid) as a proton source in amorphous silicophosphate gel structure. Obtained gels were homogeneous and chemically stable. Resulting proton conductivity is very high (up to 5.5×10−3S/cm) compared to those of silicophosphate gels.

scholarly journals Proton transfer in hydrogen-bonded degenerate systems of water and ammonia in metal–organic frameworks

2019 ◽  
Vol 10 (1) ◽  
pp. 16-33 ◽  
Author(s):  
Dae-Woon Lim ◽  
Masaaki Sadakiyo ◽  
Hiroshi Kitagawa
Keyword(s):  
Proton Transfer ◽  
Metal Organic Frameworks ◽  
Proton Conductors ◽  
Degenerate System ◽  
New Class ◽  
System P ◽  
Metal Organic ◽  
Crystalline Metal ◽  
Hydrogen Bonded

Porous crystalline metal–organic frameworks (MOFs) are emerging as a new class of proton conductors through the hydrogen-bonded degenerate system.

Structure and conductivity of Nd6MoO12-based potential electron–proton conductors under dry and wet redox conditions

2019 ◽  
Vol 6 (2) ◽  
pp. 566-575 ◽  
Author(s):  
A. V. Shlyakhtina ◽  
M. Avdeev ◽  
J. C. C. Abrantes ◽  
E. Gomes ◽  
N. V. Lyskov ◽  
...  
Keyword(s):  
Proton Conductivity ◽  
Proton Conductors ◽  
Redox Conditions ◽  
Rhombohedral Structure

Based on rhombohedral structure (R3̄) complex Nd10Mo2O21 compound has proton conductivity ∼8 × 10−4 S cm−1 at 600 °C.

Synthesis and proton conductivity of heteropolyacids loaded Y-zeolite as solid proton conductors for fuel cell applications

2006 ◽  
Vol 91 (1-3) ◽  
pp. 296-304 ◽  
Author(s):  
Mohd. Irfan Ahmad ◽  
S.M. Javaid Zaidi ◽  
S.U. Rahman ◽  
Shakeel Ahmed
Keyword(s):  
Fuel Cell ◽  
Proton Conductivity ◽  
Proton Conductors ◽  
Y Zeolite

Proton conductivity of imidazole entrapped in microporous molecular sieves

2017 ◽  
Vol 53 (16) ◽  
pp. 2475-2478 ◽  
Author(s):  
A. Jankowska ◽  
A. Zalewska ◽  
A. Skalska ◽  
A. Ostrowski ◽  
S. Kowalak
Keyword(s):  
Proton Conductivity ◽  
Molecular Sieves ◽  
Proton Conductors

Novel zeolite–imidazole composites as efficient and steady proton conductors.

Electrochemical hydrogen production from humid air using cation-modified graphene oxide membranes

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Nur Laila Hamidah ◽  
Masataka Shintani ◽  
Aynul Sakinah Ahmad Fauzi ◽  
Shota Kitamura ◽  
Elaine G. Mission ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Proton Conductivity ◽  
Room Temperature ◽  
Electrochemical Impedance ◽  
Water Electrolysis ◽  
Proton Conductors ◽  
X Ray ◽  
Chemical Structures ◽  
Modified Graphene Oxide ◽  
Modified Graphene

AbstractWater electrolysis is an environment-friendly process of producing hydrogen with zero-carbon emission. Herein, we studied the water vapor electrolysis using a proton-conducting membrane composed of graphene oxide (GO) nanosheets intercalated with cations (Al3+ and Ce3+). We examined the effect of cation introduction on the physical and chemical structures, morphology, thermal and chemical stabilities, and the proton conductivity of stacked GO nanosheet membranes by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), X-ray photoemission spectroscopy (XPS), Raman spectroscopy, atomic force microscopy (AFM), dynamic light scattering (DLS), thermogravimetric-differential thermal analysis (TG-DTA), and electrochemical impedance spectroscopy (EIS). Concentration cell measurements revealed that the cation-modified membranes are pure proton conductors at room temperature. The proton conductivity of a GO membrane was much improved by cation modification. The cation-modified GO membranes, sandwiched with Pt/C electrodes as the cathode and anode, electrolyzed humidified air to produce hydrogen at room temperature, indicating the feasibility of this carbon-based electrochemical device.

scholarly journals Phosphinate MOF formed from tetratopic ligands as proton conductive materials

2021 ◽  
Author(s):  
Matouš Kloda ◽  
Tomáš Plecháček ◽  
Soňa Ondrušová ◽  
Petr Brázda ◽  
Petr Chalupský ◽  
...  
Keyword(s):  
Electron Diffraction ◽  
Proton Transfer ◽  
Rational Design ◽  
Metal Organic Frameworks ◽  
Adsorbed Water ◽  
Proton Conductors ◽  
Water Molecules ◽  
Conductive Materials ◽  
Grotthuss Mechanism ◽  
Metal Organic

Metal organic frameworks (MOFs) are attracting attention as potential proton conductors. There are two main advantages of MOFs in this application: the possibility of rational design and tuning of the properties, and clear conduction pathways given by their crystalline structure. We hereby present two new MOF structures, ICR-10 and ICR-11, based on tetratopic phosphinate ligands. The structures of both MOFs were determined by 3D electron diffraction. They both crystallize in the P-3 space group and contain arrays of parallel linear pores lined with hydrophilic non-coordinated phosphinate groups. This, together with the adsorbed water molecules, facilitates proton transfer via the Grotthuss mechanism, leading to the proton conductivity up to 4.26∙10-4 S cm-1 for ICR-11.

Metal-Organic Frameworks as Proton Conductors: Strategies for Improved Proton Conductivity

2021 ◽  
Author(s):  
Kumar Biradha ◽  
Anindita Goswami ◽  
Rajib Moi ◽  
Subhajit Saha
Keyword(s):  
Composite Materials ◽  
Proton Conductivity ◽  
High Performance ◽  
Metal Organic Frameworks ◽  
Proton Conductors ◽  
Potential Applications ◽  
Metal Organic

Recent studies on proton conductivity using pristine MOFs and their composite materials have established an outstanding area of research owing to their potential applications for the developments of high performance...

Solid Proton Conductor Based on Natural Diatomite

2011 ◽  
Vol 675-677 ◽  
pp. 49-52 ◽  
Author(s):  
Bo Wang
Keyword(s):  
Fuel Cells ◽  
Proton Conductivity ◽  
Gas Sensors ◽  
Room Temperature ◽  
Complex Impedance ◽  
Proton Conductor ◽  
Proton Conductors ◽  
Ph Sensors ◽  
Humidity Sensors ◽  
Impedance Technique

Proton conductivity of the natural diatomite was studied by AC complex impedance technique. At room temperature, the highest proton conductivity was found to be 4.5　10-7 S·cm-1. By hydrating the diatomite, the proton conductivity was increased by two orders of magnitude. The room temperate proton conductivity of the hydrated diatomite (5.5　10-5 S·cm-1) was comparable to other hydrated solid proton conductors. Based on these results, the natural diatomite could be used as solid proton conductor for various electrochemical applications such as fuel cells, gas sensors, humidity sensors, and pH sensors.

Proton Transfer in Low Temperature Proton Conductors

1995 ◽  
Vol 5 (2) ◽  
pp. 46-49 ◽  
Author(s):  
Andrei B. Yaroslavtsev ◽  
Dmitrii L. Gorbatchev
Keyword(s):  
Low Temperature ◽  
Proton Transfer ◽  
Proton Conductors
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