Conductivity Response of Porous Electrodes Supported on Perfluorosulfonic Acid Membranes to Acidic Gas Mixtures

Armand Bettelheim; Rachel Harth; Dan Ozer; Uri Mor; Benjamin Segal

doi:10.1021/ac00023a012

Conductivity Response of Porous Electrodes Supported on Perfluorosulfonic Acid Membranes to Acidic Gas Mixtures

Armand Bettelheim, Rachel Harth, Dan Ozer, Uri Mor, Benjamin Segal

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

11 Scopus citations

Abstract

Gold or platinum films deposited on a Nation membrane were used to measure surface conductance of the membrane. Acidic gases such as HCl or S0₂, Introduced as mixtures with an Inert gas, were found to affect the conductance of the membrane surface facing this mixture while the other side of the membrane was constantly supplied with a moist inert gas. The relative conductance (G/G₀) Is most affected within the 0–0.5 and 3–4.5 vol % ranges both for HCl and S0₂. The effect Is higher for the Pt-deposlted than it Is for the gold-deposited membrane: for an HCl concentration of 1.5 vol %, G/G₀ Is 5 for Pt deposited on Nation while it Is only 1.3 for gold deposited on Nation. This Is attributed to different geometries and porosity of the Pt and Au electrodes. No conductance response was observed for C0₂ which yields with water a much weaker acid than those formed by HCl and S0₂.

Original language	English
Pages (from-to)	2724-2727
Number of pages	4
Journal	Analytical Chemistry
Volume	63
Issue number	23
DOIs	https://doi.org/10.1021/ac00023a012
State	Published - 1 Dec 1991
Externally published	Yes

ASJC Scopus subject areas

Analytical Chemistry

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10.1021/ac00023a012

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title = "Conductivity Response of Porous Electrodes Supported on Perfluorosulfonic Acid Membranes to Acidic Gas Mixtures",

abstract = "Gold or platinum films deposited on a Nation membrane were used to measure surface conductance of the membrane. Acidic gases such as HCl or S02, Introduced as mixtures with an Inert gas, were found to affect the conductance of the membrane surface facing this mixture while the other side of the membrane was constantly supplied with a moist inert gas. The relative conductance (G/G0) Is most affected within the 0–0.5 and 3–4.5 vol % ranges both for HCl and S02. The effect Is higher for the Pt-deposlted than it Is for the gold-deposited membrane: for an HCl concentration of 1.5 vol %, G/G0 Is 5 for Pt deposited on Nation while it Is only 1.3 for gold deposited on Nation. This Is attributed to different geometries and porosity of the Pt and Au electrodes. No conductance response was observed for C02 which yields with water a much weaker acid than those formed by HCl and S02.",

author = "Armand Bettelheim and Rachel Harth and Dan Ozer and Uri Mor and Benjamin Segal",

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publisher = "American Chemical Society",

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TY - JOUR

T1 - Conductivity Response of Porous Electrodes Supported on Perfluorosulfonic Acid Membranes to Acidic Gas Mixtures

AU - Bettelheim, Armand

AU - Harth, Rachel

AU - Ozer, Dan

AU - Mor, Uri

AU - Segal, Benjamin

PY - 1991/12/1

Y1 - 1991/12/1

N2 - Gold or platinum films deposited on a Nation membrane were used to measure surface conductance of the membrane. Acidic gases such as HCl or S02, Introduced as mixtures with an Inert gas, were found to affect the conductance of the membrane surface facing this mixture while the other side of the membrane was constantly supplied with a moist inert gas. The relative conductance (G/G0) Is most affected within the 0–0.5 and 3–4.5 vol % ranges both for HCl and S02. The effect Is higher for the Pt-deposlted than it Is for the gold-deposited membrane: for an HCl concentration of 1.5 vol %, G/G0 Is 5 for Pt deposited on Nation while it Is only 1.3 for gold deposited on Nation. This Is attributed to different geometries and porosity of the Pt and Au electrodes. No conductance response was observed for C02 which yields with water a much weaker acid than those formed by HCl and S02.

AB - Gold or platinum films deposited on a Nation membrane were used to measure surface conductance of the membrane. Acidic gases such as HCl or S02, Introduced as mixtures with an Inert gas, were found to affect the conductance of the membrane surface facing this mixture while the other side of the membrane was constantly supplied with a moist inert gas. The relative conductance (G/G0) Is most affected within the 0–0.5 and 3–4.5 vol % ranges both for HCl and S02. The effect Is higher for the Pt-deposlted than it Is for the gold-deposited membrane: for an HCl concentration of 1.5 vol %, G/G0 Is 5 for Pt deposited on Nation while it Is only 1.3 for gold deposited on Nation. This Is attributed to different geometries and porosity of the Pt and Au electrodes. No conductance response was observed for C02 which yields with water a much weaker acid than those formed by HCl and S02.

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JO - Industrial And Engineering Chemistry Analytical Edition

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Conductivity Response of Porous Electrodes Supported on Perfluorosulfonic Acid Membranes to Acidic Gas Mixtures

Abstract

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