Electrochemical characterization and morphological studies of palladium-modified carbon ceramic electrodes

Jenny Gun; Michael Tsionsky; Leonid Rabinovich; Yuval Golan; Israel Rubinstein; Ovadia Lev

doi:10.1016/0022-0728(95)03984-O

Electrochemical characterization and morphological studies of palladium-modified carbon ceramic electrodes

Jenny Gun, Michael Tsionsky, Leonid Rabinovich, Yuval Golan, Israel Rubinstein, Ovadia Lev^*

^*Corresponding author for this work

Institute of Chemistry

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

35 Scopus citations

Abstract

Palladium-modified carbon ceramic composite gas electrodes (Pd/CCE) are presented and characterized. The electrodes are comprised of graphite powder percolating through hydrophobically modified silica xerogels. The electrodes were prepared by mixing Pd salt and carbon powder with the sol-gel precursors and reduction of palladium ions after xerogel formation. The morphology and surface characteristics of the composite materials were examined by electron microscopy, X-ray microanalysis, nitrogen adsorption and water wetting angle measurements. Oxygen reduction was used as a model reaction to probe the characteristics of the wetted section of the Pd/CCEs. Voltammetric studies and polarization curves were employed to elucidate the size and structure of the active layer as a function of palladium content.

Original language	English
Pages (from-to)	57-66
Number of pages	10
Journal	Journal of Electroanalytical Chemistry
Volume	395
Issue number	1-2
DOIs	https://doi.org/10.1016/0022-0728(95)03984-O
State	Published - 10 Oct 1995

Keywords

Carbon ceramic composites
Electrochemically active layer
Modified electrodes
Morphology surface structure

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10.1016/0022-0728(95)03984-O

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abstract = "Palladium-modified carbon ceramic composite gas electrodes (Pd/CCE) are presented and characterized. The electrodes are comprised of graphite powder percolating through hydrophobically modified silica xerogels. The electrodes were prepared by mixing Pd salt and carbon powder with the sol-gel precursors and reduction of palladium ions after xerogel formation. The morphology and surface characteristics of the composite materials were examined by electron microscopy, X-ray microanalysis, nitrogen adsorption and water wetting angle measurements. Oxygen reduction was used as a model reaction to probe the characteristics of the wetted section of the Pd/CCEs. Voltammetric studies and polarization curves were employed to elucidate the size and structure of the active layer as a function of palladium content.",

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T1 - Electrochemical characterization and morphological studies of palladium-modified carbon ceramic electrodes

AU - Gun, Jenny

AU - Tsionsky, Michael

AU - Rabinovich, Leonid

AU - Golan, Yuval

AU - Rubinstein, Israel

AU - Lev, Ovadia

PY - 1995/10/10

Y1 - 1995/10/10

N2 - Palladium-modified carbon ceramic composite gas electrodes (Pd/CCE) are presented and characterized. The electrodes are comprised of graphite powder percolating through hydrophobically modified silica xerogels. The electrodes were prepared by mixing Pd salt and carbon powder with the sol-gel precursors and reduction of palladium ions after xerogel formation. The morphology and surface characteristics of the composite materials were examined by electron microscopy, X-ray microanalysis, nitrogen adsorption and water wetting angle measurements. Oxygen reduction was used as a model reaction to probe the characteristics of the wetted section of the Pd/CCEs. Voltammetric studies and polarization curves were employed to elucidate the size and structure of the active layer as a function of palladium content.

AB - Palladium-modified carbon ceramic composite gas electrodes (Pd/CCE) are presented and characterized. The electrodes are comprised of graphite powder percolating through hydrophobically modified silica xerogels. The electrodes were prepared by mixing Pd salt and carbon powder with the sol-gel precursors and reduction of palladium ions after xerogel formation. The morphology and surface characteristics of the composite materials were examined by electron microscopy, X-ray microanalysis, nitrogen adsorption and water wetting angle measurements. Oxygen reduction was used as a model reaction to probe the characteristics of the wetted section of the Pd/CCEs. Voltammetric studies and polarization curves were employed to elucidate the size and structure of the active layer as a function of palladium content.

KW - Carbon ceramic composites

KW - Electrochemically active layer

KW - Modified electrodes

KW - Morphology surface structure

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Electrochemical characterization and morphological studies of palladium-modified carbon ceramic electrodes

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Keywords

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