Acid-functionalised periodic mesoporous benzenosilica proton conductors
authors Domingues, EM; Salvador, MA; Ferreira, P; Figueiredo, FM
nationality International
journal SOLID STATE IONICS
author keywords Mesoporous; Hybrids; Organosilica; Proton conductivity; Fuel cell
keywords SULFONIC-ACID; SILICA; ORGANOSILICA; CONDUCTIVITY; TEMPERATURE; MEMBRANES; WALLS
abstract An investigation of proton conducting periodic mesoporous benzenosilica hybrids functionalised with sulfonic or phosphonic acids obtained by a co-condensation route is presented. Protonic conductivity data obtained under different temperatures and relative humidity conditions are reported in order to assess the combined effects of composition and concentration of the functional acid group, and microstructural features such as pore size, specific surface area and meso- and molecular-scale order. It is found that the conductivity increases significantly with increasing acid load, specific surface area and relative humidity. A proton conductivity of 0.3 Sm-1 at 100 degrees C and 100% relative humidity is reported for a sulfonic acid functionalised PMO which is three orders of magnitude higher than the value reported for a similar material obtained by grafting. (C) 2012 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE BV
issn 0167-2738
year published 2012
volume 225
beginning page 308
ending page 311
digital object identifier (doi) 10.1016/j.ssi.2012.06.010
web of science category Chemistry, Physical; Physics, Condensed Matter
subject category Chemistry; Physics
unique article identifier WOS:000311873400063
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journal impact factor 2.751
5 year journal impact factor 2.607
category normalized journal impact factor percentile 58.483
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