Acid-functionalised periodic mesoporous benzenosilica proton conductors

Eddy M. Domingues; Maria A. Salvador; Paula Ferreira; Filipe M. Figueiredo

doi:10.1016/j.ssi.2012.06.010

Acid-functionalised periodic mesoporous benzenosilica proton conductors

Eddy M. Domingues, Maria A. Salvador, Paula Ferreira, Filipe M. Figueiredo^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

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 °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.

Original language	English (US)
Pages (from-to)	308-311
Number of pages	4
Journal	Solid State Ionics
Volume	225
DOIs	https://doi.org/10.1016/j.ssi.2012.06.010
State	Published - Oct 4 2012
Externally published	Yes

Bibliographical note

Funding Information:
This work was supported by the FCT under projects HyPEM - FEDER/QREN - COMPETE PTDC/CTM– CER/109843/2009 and Pest-C/CTM/LA0011/2011. E. Domingues and M.A. Salvador are particularly indebted to FCT (SFRH/BD/48042/2008 and SFRH/BD/60903/2009).

Keywords

Fuel cell
Hybrids
Mesoporous
Organosilica
Proton conductivity

ASJC Scopus subject areas

General Chemistry
General Materials Science
Condensed Matter Physics

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10.1016/j.ssi.2012.06.010

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@article{03201e0f84f04997971363fcfdb7467b,

title = "Acid-functionalised periodic mesoporous benzenosilica proton conductors",

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 °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.",

keywords = "Fuel cell, Hybrids, Mesoporous, Organosilica, Proton conductivity",

author = "Domingues, {Eddy M.} and Salvador, {Maria A.} and Paula Ferreira and Figueiredo, {Filipe M.}",

note = "Funding Information: This work was supported by the FCT under projects HyPEM - FEDER/QREN - COMPETE PTDC/CTM– CER/109843/2009 and Pest-C/CTM/LA0011/2011. E. Domingues and M.A. Salvador are particularly indebted to FCT (SFRH/BD/48042/2008 and SFRH/BD/60903/2009).",

year = "2012",

month = oct,

day = "4",

doi = "10.1016/j.ssi.2012.06.010",

language = "English (US)",

volume = "225",

pages = "308--311",

journal = "Solid State Ionics",

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publisher = "Elsevier",

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TY - JOUR

T1 - Acid-functionalised periodic mesoporous benzenosilica proton conductors

AU - Domingues, Eddy M.

AU - Salvador, Maria A.

AU - Ferreira, Paula

AU - Figueiredo, Filipe M.

N1 - Funding Information: This work was supported by the FCT under projects HyPEM - FEDER/QREN - COMPETE PTDC/CTM– CER/109843/2009 and Pest-C/CTM/LA0011/2011. E. Domingues and M.A. Salvador are particularly indebted to FCT (SFRH/BD/48042/2008 and SFRH/BD/60903/2009).

PY - 2012/10/4

Y1 - 2012/10/4

N2 - 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 °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.

AB - 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 °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.

KW - Fuel cell

KW - Hybrids

KW - Mesoporous

KW - Organosilica

KW - Proton conductivity

UR - http://www.scopus.com/inward/record.url?scp=84867572587&partnerID=8YFLogxK

U2 - 10.1016/j.ssi.2012.06.010

DO - 10.1016/j.ssi.2012.06.010

M3 - Article

AN - SCOPUS:84867572587

SN - 0167-2738

VL - 225

SP - 308

EP - 311

JO - Solid State Ionics

JF - Solid State Ionics

ER -

Acid-functionalised periodic mesoporous benzenosilica proton conductors

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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