Protonic mobility in acidic colloids

L. Pautrot-d'Alençon; P. Barboux; D. Carrière; K. Lahlil; S. Maron

doi:10.1016/j.ssi.2006.06.015

Protonic mobility in acidic colloids

L. Pautrot-d'Alençon
, P. Barboux
, D. Carrière
, K. Lahlil
, S. Maron

Institut Pierre Simon Laplace, CNRS and CEA

Résultats de recherche: Contribution à un journal › Article › Revue par des pairs

Résumé

Colloidal monoclinic zirconia ZrO₂ particles have been synthesized by hydrothermal treatment from acetate solutions. To increase their surface acidity, they have been treated by aqueous solutions of phosphoric acid, sulfophenylphosphonic acid (SPPA, (HO)₂(O)-C₆H₆-SO₃H) and sulfodifluoromethylphosphonic acid (SFPA, (HO)₂(O)P-CF₂-SO₃H). This leads to the covalent bonding of phosphoric or sulfonic acid groups onto the surface of the particles. Solid state NMR (³¹P, ¹H) studies show the covalent grafting of the phosphate and phosphonates groups and qualitatively illustrate the fast proton dynamics of these surface conducting materials as compared with that of crystalline α-Zr(HPO₄)₂. H₂O. But, water adsorption is still necessary to increase the long distance proton mobility. Then, the macroscopic conductivity remains low (between 10^{- 4} S cm^{- 1} and 10^{- 3} S cm^{- 1} 25 °C, RH 70%) and shows a strong hysteresis while cycling the relative humidity. The mechanism limiting the conductivity seems to be interparticle transfer.

langue originale	Anglais
Pages (de - à)	2561-2564
Nombre de pages	4
journal	Solid State Ionics
Volume	177
Numéro de publication	26-32 SPEC. ISS.
Les DOIs	https://doi.org/10.1016/j.ssi.2006.06.015
état	Publié - 31 oct. 2006

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10.1016/j.ssi.2006.06.015

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title = "Protonic mobility in acidic colloids",

abstract = "Colloidal monoclinic zirconia ZrO2 particles have been synthesized by hydrothermal treatment from acetate solutions. To increase their surface acidity, they have been treated by aqueous solutions of phosphoric acid, sulfophenylphosphonic acid (SPPA, (HO)2(O)-C6H6-SO3H) and sulfodifluoromethylphosphonic acid (SFPA, (HO)2(O)P-CF2-SO3H). This leads to the covalent bonding of phosphoric or sulfonic acid groups onto the surface of the particles. Solid state NMR (31P, 1H) studies show the covalent grafting of the phosphate and phosphonates groups and qualitatively illustrate the fast proton dynamics of these surface conducting materials as compared with that of crystalline α-Zr(HPO4)2. H2O. But, water adsorption is still necessary to increase the long distance proton mobility. Then, the macroscopic conductivity remains low (between 10- 4 S cm- 1 and 10- 3 S cm- 1 25 °C, RH 70\%) and shows a strong hysteresis while cycling the relative humidity. The mechanism limiting the conductivity seems to be interparticle transfer.",

keywords = "Colloidal zirconia, Hybrid colloids, Magnetic resonance, Proton conduction",

author = "L. Pautrot-d'Alen{\c c}on and P. Barboux and D. Carri{\`e}re and K. Lahlil and S. Maron",

year = "2006",

month = oct,

day = "31",

doi = "10.1016/j.ssi.2006.06.015",

language = "English",

volume = "177",

pages = "2561--2564",

journal = "Solid State Ionics",

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T1 - Protonic mobility in acidic colloids

AU - Pautrot-d'Alençon, L.

AU - Barboux, P.

AU - Carrière, D.

AU - Lahlil, K.

AU - Maron, S.

PY - 2006/10/31

Y1 - 2006/10/31

N2 - Colloidal monoclinic zirconia ZrO2 particles have been synthesized by hydrothermal treatment from acetate solutions. To increase their surface acidity, they have been treated by aqueous solutions of phosphoric acid, sulfophenylphosphonic acid (SPPA, (HO)2(O)-C6H6-SO3H) and sulfodifluoromethylphosphonic acid (SFPA, (HO)2(O)P-CF2-SO3H). This leads to the covalent bonding of phosphoric or sulfonic acid groups onto the surface of the particles. Solid state NMR (31P, 1H) studies show the covalent grafting of the phosphate and phosphonates groups and qualitatively illustrate the fast proton dynamics of these surface conducting materials as compared with that of crystalline α-Zr(HPO4)2. H2O. But, water adsorption is still necessary to increase the long distance proton mobility. Then, the macroscopic conductivity remains low (between 10- 4 S cm- 1 and 10- 3 S cm- 1 25 °C, RH 70%) and shows a strong hysteresis while cycling the relative humidity. The mechanism limiting the conductivity seems to be interparticle transfer.

AB - Colloidal monoclinic zirconia ZrO2 particles have been synthesized by hydrothermal treatment from acetate solutions. To increase their surface acidity, they have been treated by aqueous solutions of phosphoric acid, sulfophenylphosphonic acid (SPPA, (HO)2(O)-C6H6-SO3H) and sulfodifluoromethylphosphonic acid (SFPA, (HO)2(O)P-CF2-SO3H). This leads to the covalent bonding of phosphoric or sulfonic acid groups onto the surface of the particles. Solid state NMR (31P, 1H) studies show the covalent grafting of the phosphate and phosphonates groups and qualitatively illustrate the fast proton dynamics of these surface conducting materials as compared with that of crystalline α-Zr(HPO4)2. H2O. But, water adsorption is still necessary to increase the long distance proton mobility. Then, the macroscopic conductivity remains low (between 10- 4 S cm- 1 and 10- 3 S cm- 1 25 °C, RH 70%) and shows a strong hysteresis while cycling the relative humidity. The mechanism limiting the conductivity seems to be interparticle transfer.

KW - Colloidal zirconia

KW - Hybrid colloids

KW - Magnetic resonance

KW - Proton conduction

UR - https://www.scopus.com/pages/publications/33750323039

U2 - 10.1016/j.ssi.2006.06.015

DO - 10.1016/j.ssi.2006.06.015

M3 - Article

AN - SCOPUS:33750323039

SN - 0167-2738

VL - 177

SP - 2561

EP - 2564

JO - Solid State Ionics

JF - Solid State Ionics

IS - 26-32 SPEC. ISS.

ER -

Protonic mobility in acidic colloids

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