Polymorphic layered copper phosphonates: exfoliation and proton conductivity studies

2019 ◽  
Vol 48 (19) ◽  
pp. 6539-6545 ◽  
Author(s):  
Bei Liu ◽  
Jing-Cui Liu ◽  
Yang Shen ◽  
Jian-Shen Feng ◽  
Song-Song Bao ◽  
...  
Keyword(s):  
Proton Conductivity ◽  
Phosphonic Acid ◽  
Proton Conduction ◽  
Layered Compounds

α-Cu(4-cnappH)(H2O) (α-Cu-1), α-Cu(4-cnappH)(H2O)·0.5H2O (α-Cu-2) and β-Cu(4-cnappH)(H2O) (β-Cu) [4-cnappH3 = (4-carboxynaphthalen-1-yl)phosphonic acid] are polymorphic layered compounds. Proton conduction is more favorable in α-Cu-2 than in α-Cu-1, but exfoliation into nanosheets decreases the conductivity.

‘Proton Escalator’ PEI and Phosphotungstic Acid Constructing a Nanofiber Membrane with Remarkable Proton Conductivity

2021 ◽  
Author(s):  
Xiuwei Sun ◽  
Shumei Liu ◽  
Qingyin Wu ◽  
Shan Zhang ◽  
Hong-Rui Tian ◽  
...  
Keyword(s):  
Proton Conductivity ◽  
Phosphotungstic Acid ◽  
Proton Conduction ◽  
High Density ◽  
Nanofiber Membrane ◽  
New Type ◽  
High Flexibility

Polyethyleneimine (PEI) is expected to become a new type of proton conduction booster due to its high density amine and extremely high flexibility. Herein, a nanofiber membrane (eHPW-PEI) composed of...

Proton Exchange Membrane Development and Processing for Fuel Cell Application

2007 ◽  
Vol 539-543 ◽  
pp. 1327-1331
Author(s):  
Philippe Bébin ◽  
Hervé Galiano
Keyword(s):  
Fuel Cell ◽  
Proton Conductivity ◽  
Proton Conduction ◽  
Proton Exchange ◽  
Membrane Properties ◽  
Organic Polymer ◽  
Polysulfone Membrane ◽  
Sulfonated Polysulfone ◽  
Membrane Processing ◽  
Conductive Fillers

The development of new proton exchange membranes for PEMFC has to be related to the membrane processing as it can change drastically the final properties of the material. Indeed, for the same material, a membrane prepared by a solvent-casting process has a lower lifetime than an extruded one. The proton conduction of the membrane can also be dependent on the membrane processing, especially when some removable plasticizers are used to perform the membrane extrusion. Some residual porosity, left in the material after removing the plasticizer, is suspected to enhance the proton conduction of the film. Fuel cell experiments have shown that extruded sulfonated polysulfone membrane can give the same performance as a Nafion® reference membrane whereas the proton conductivity of PSUs is twenty times lower than the Nafion® one. Additional improvements of the membrane properties can also be expected by adding some proton conductive fillers to the organic polymer. This approach enhances the proton conductivity of sulfonated polysulfone to values similar to Nafion®. On the other hand, when Nafion® is used as a matrix for the proton conductive fillers, a very significant improvement of fuel cell performance is obtained.

A water-stable Ni(ii) diphosphonate exhibiting water vapor adsorption and water-assisted high proton conductivity

2019 ◽  
Vol 43 (2) ◽  
pp. 807-812 ◽  
Author(s):  
Hailong Xu ◽  
Lu Feng ◽  
Wentao Huang ◽  
Qiaoyun Wang ◽  
Hong Zhou
Keyword(s):  
Thermal Properties ◽  
Water Vapor ◽  
Proton Conductivity ◽  
Proton Conduction ◽  
Water Vapor Adsorption ◽  
Water Stability ◽  
High Proton Conductivity ◽  
Vapor Adsorption ◽  
High Proton

A new nickel phosphonate has been synthesized, and its thermal properties, water stability, water vapor adsorption and proton conduction have been investigated.

Calix[4]resorcinarene-based [Co16] coordination cages mediated by isomorphous auxiliary ligands for enhanced proton conduction

2019 ◽  
Vol 55 (44) ◽  
pp. 6277-6280 ◽  
Author(s):  
Ting-Ting Guo ◽  
Dong-Ming Cheng ◽  
Jin Yang ◽  
Xianxiu Xu ◽  
Jian-Fang Ma
Keyword(s):  
Proton Conductivity ◽  
Proton Conduction ◽  
Design Approach ◽  
Coordination Cages

Two remarkable calix[4]resorcinarene-based [Co16] coordination cages were assembled by a design approach, where the proton conductivity was enhanced drastically by carefully mediating the auxiliary ligands.

Highly selective sensing of Fe3+/Hg2+ and proton conduction using two fluorescent Zn(ii) coordination polymers

2020 ◽  
Vol 49 (32) ◽  
pp. 11129-11141
Author(s):  
Tian-Yang Xu ◽  
Hong-Jiao Nie ◽  
Jia-Ming Li ◽  
Zhong-Feng Shi
Keyword(s):  
Proton Conductivity ◽  
Coordination Polymers ◽  
Proton Conduction ◽  
Fluorescence Sensing

A pair of Zn-based homologues show significant differences in the fluorescence sensing of Hg2+/Fe3+ ions and proton conductivity.

scholarly journals The role of lattice vibration in the terahertz region for proton conduction in 2D metal–organic frameworks

2020 ◽  
Vol 11 (6) ◽  
pp. 1538-1541
Author(s):  
Tomoya Itakura ◽  
Hiroshi Matsui ◽  
Tomofumi Tada ◽  
Susumu Kitagawa ◽  
Aude Demessence ◽  
...  
Keyword(s):  
Proton Conductivity ◽  
Electronic Structures ◽  
Lattice Vibration ◽  
Metal Organic Frameworks ◽  
Proton Conduction ◽  
Terahertz Region ◽  
Metal Organic

Terahertz-regime vibrations of 2D MOFs dominate the intrinsic proton conductivity, and the motions depend on the valence electronic structures.

scholarly journals Functionality in metal–organic framework minerals: proton conductivity, stability and potential for polymorphism

2019 ◽  
Vol 10 (18) ◽  
pp. 4923-4929 ◽  
Author(s):  
Igor Huskić ◽  
Novendra Novendra ◽  
Dae-Woon Lim ◽  
Filip Topić ◽  
Hatem M. Titi ◽  
...  
Keyword(s):  
Proton Conductivity ◽  
Metal Organic Framework ◽  
Proton Conduction ◽  
High Proton ◽  
Metal Organic ◽  
Structure Retention ◽  
Organic Framework

Metal–organic framework minerals stepanovite and zhemchuzhnikovite can exhibit high proton conduction and structure retention on dehydration.

Crystalline and permanently porous porphyrin-based metal tetraphosphonates

2018 ◽  
Vol 54 (4) ◽  
pp. 389-392 ◽  
Author(s):  
Timo Rhauderwiek ◽  
Konrad Wolkersdörfer ◽  
Sigurd Øien-Ødegaard ◽  
Karl-Petter Lillerud ◽  
Michael Wark ◽  
...  
Keyword(s):  
Proton Conductivity ◽  
Phosphonic Acid ◽  
Sorption Properties

The first porous MOF containing a porphyrin-based phosphonic acid was synthesized and characterized regarding its sorption properties and proton conductivity.

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