Results 231 to 240 of about 107,480 (290)

Proton‐Conducting Magnetic Coordination Polymers

Chemistry – A European Journal, 2015
AbstractThree isostructural lanthanide‐based two‐ dimensional coordination polymers (CPs) {[Ln2(L)3(H2O)2]n⋅2n CH3OH)⋅2n H2O} (Ln=Gd3+ (1), Tb3+ (2), Dy3+ (3); H2L=cyclobutane‐1,1‐dicarboxylic acid) were synthesized by using a low molecular weight dicarboxylate ligand and characterized.
Soumava, Biswas, Himanshu Sekhar, Jena, Suresh, Sanda, Sanjit, Konar   +3 more
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Proton diffusion in proton conducting oxides

Phase Transitions, 1996
Abstract Quasielastic neutron scattering was used to study the atomistic proton diffusion mechanism in Yb-doped SrCeO3, a proton conducting perovskite, simultaneously in space and time. Proton diffusion consists of a sequence of trapping and free diffusion events.
R. Hempelmann, Ch. Karmonik
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Proton-conducting crystalline porous materials

Chemical Society Reviews, 2017
This review summarizes the emerging studies of proton-conducting materials, and discusses the synthetic strategies and possible mechanisms, identifying key structural factors.
Xing, Meng, Hai-Ning, Wang, Shu-Yan, Song, Hong-Jie, Zhang   +3 more
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Proton conduction in discotic mesogens

Chemical Communications, 2011
We show that discotic mesogens can be used to lower the activation energy barrier for proton transport.
Dipankar, Basak, Scott, Christensen, Sravan K, Surampudi, Craig, Versek, Daniel T, Toscano, Mark T, Tuominen, Ryan C, Hayward, D, Venkataraman   +7 more
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Proton conductance of cell membranes

Journal of Theoretical Biology, 1973
Abstract Several workers have suggested that cell membranes have a high proton conductance. Our interest in this concept arose from the possibility that the nutrient (submucosal-facing) membrane of the gastric mucosa may have a high proton or hydroxyl ion conductance which would play a role in the regulation of the acid-base balance of the cell.
W S, Rehm, S S, Sanders, R L, Shoemaker, J, O'Callaghan, J T, Tarvin, E A, Friday   +5 more
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Composite Proton‐Conducting Membranes for PEMFCs

Fuel Cells, 2007
AbstractComposite membranes are of interest for PEMFCs and DMFCs. This paper describes a basic study of the influence of silica on the proton conductivity: (i) added as a filler to poly(vinylidene fluoride‐hexafluoropropylene) and poly(benzimidazole)‐based membranes activated with H3PO4, or (ii) included in the matrix of class II hybrids based on ...
Mustarelli, P, Carollo, A, Grandi, S, Quartarone, E, Tomasi, C, Leonardi, S, Magistris, A   +6 more
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Protonic and Electronic Conduction in Proton Conductive Solid Oxide Fuel Cells

MRS Proceedings, 2011
ABSTRACTProtons can fit into the perovskite structure because the O-O distance is approximately that of ice. However, to achieve charge balance, -2e charge must be added for every two protons added. If O2- vacancies are introduced, for instance by doping barium cerate with yttrium to obtain ${\it Ba}^{2 + } {\it Ce}_{1 - {\it x}}^{4 + } {\it Y}_{\it x}^
V. Hugo Schmidt, Chih-Long Tsai
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Electrolyte Proton-Conductive Materials for CONDUCTIVE Protonic Ceramic Fuel Cells (PCFCs)

ECS Meeting Abstracts, 2006
Abstract not Available.
Stephanie Higgins, Nigel Sammes, Alevtina Smirnova   +2 more
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Fast proton conducting glasses: Creation by proton implantation and a requirement for fast proton conduction

Journal of Applied Physics, 1997
Fast proton conducting glasses have been obtained in Mg(PO3)2 glasses by implantation of protons at 120 keV to a fluence of 1×1018 cm−2. The dc conductivity and the activation energy of the conduction in the implanted glasses are 5×10−4 s cm−1 at room temperature and 0.18 eV, respectively.
H.Hosono, K.Kawamura, H.Kawazoe, N.Matsunami, Y.Abe   +4 more
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Vacancies enhance proton conductivity

Science, 2020
Proton Membranes Proton-exchange membranes (PEMs) allow for the transport of protons while acting as electrical insulators and ensuring that reactants are kept apart; therefore, they are a key component in devices such as low-temperature fuel cells. PEMs are typically made from polymers or materials embedded in a polymer matrix and need to operate in ...
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