Rational design of the surface properties of heterogeneous catalysts can boost the interfacial activity in biphasic reactions through the generation of Pickering emulsions. This concept, termed Pickering interfacial catalysis (PIC), has shown promising credentials in acid-catalyzed transesterification, ester hydrolysis, acetalization, etherification, and alkylation reactions. PIC has now been applied to the efficient, solvent-free hydrolysis of the triglyceride glyceryl trilaurate to lauric acid, catalyzed by Aquivion perfluorosulfonic superacid at mild conditions (100 °C and ambient pressure).
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http://dx.doi.org/10.1002/cssc.201700663 | DOI Listing |
ACS Appl Mater Interfaces
February 2024
Department of Materials Science and Engineering, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8552, Japan.
In this study, thin fiber composite polymer electrolyte membranes (PEMs) were prepared using short side-chain perfluorosulfonic acid (PFSA) ionomers, Aquivion, to create composite PEMs with improved proton conductivity and improved mechanical properties. PFSA thin fiber webs prepared by blow spinning and successive hot pressing were used as the porous substrate. Herein, PFSA ionomers were used for both the substrate and the matrix of the composite PEMs, and their structures, properties, and fuel cell performance were characterized.
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October 2023
Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, 141980 Dubna, Russia.
In this study, we aimed to design and research proton-conducting membranes based on Aquivion-type material that had been modified with detonation nanodiamonds (particle size 4-5 nm, 0.25-5.0 wt.
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September 2023
CNR-ITAE, Institute of Advanced Energy Technologies, National Research Council, Via Salita S. Lucia Sopra Contesse 5, 98126 Messina, Italy.
A Ce-radical scavenger-based perfluorosulfonic acid (PFSA) Aquivion membrane (C98 05S-RSP) was developed and assessed for polymer electrolyte membrane (PEM) electrolyser applications. The membrane, produced by Solvay Specialty Polymers, had an equivalent weight (EW) of 980 g/eq and a thickness of 50 μm to reduce ohmic losses at a high current density. The electrochemical properties and gas crossover through the membrane were evaluated upon the formation of a membrane-electrode assembly (MEA) in a range of temperatures between 30 and 90 °C and at various differential pressures (ambient, 10 and 20 bars).
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August 2023
Petersburg Nuclear Physics Institute Named by B.P. Konstantinov of National Research Center "Kurchatov Institute", 188300 Gatchina, Russia.
Aquivion-type perfluorosulfonic acid membranes with a polytetrafluoroethylene backbone and short side chains with sulfonic acid groups at the ends have great prospects for operating in hydrogen fuel cells. To improve the conducting properties of membranes, various types of nanofillers can be used. We prepared compositional Aquivion-type membranes with embedded detonation nanodiamond particles.
View Article and Find Full Text PDFMembranes (Basel)
July 2023
Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russia.
The development of accessible express methods to determine markers of viral diseases in saliva is currently an actual problem. Novel cross-sensitive sensors based on Donnan potential with bio-comparable perfluorosulfonic acid membranes for the determination of salivary viral markers (-acetyl--methionine, -carnitine, and -lysine) were proposed. Membranes were formed by casting from dispersions of Nafion or Aquivion in -methyl-2-pyrollidone or in a mixture of isopropyl alcohol and water.
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