Modification of palladium-based catalysts by chalcogenes for direct methanol fuel cells

Palladium-based catalysts, such as PdS x /C and PdSe x /C, have been developed as oxygen reduction catalysts for direct methanol fuel cells. Pd/C catalysts containing chalcogens have been synthesized and tested for oxygen reduction and the results have been analyzed based on changes in the palladium...

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Bibliographic Details
Published in:Electrochemistry communications 2007-08, Vol.9 (8), p.2041-2044
Main Authors: Serov, Alexey Alexandrovich, Cho, Sung-Yong, Han, Sangil, Min, Myoungki, Chai, Geunseok, Nam, Kie Hyun, Kwak, Chan
Format: Article
Language:English
Subjects:
Applied sciences
Energy
Energy. Thermal use of fuels
Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc
Exact sciences and technology
Fuel cells
Palladium
Selenium
Sulfur
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Summary:Palladium-based catalysts, such as PdS x /C and PdSe x /C, have been developed as oxygen reduction catalysts for direct methanol fuel cells. Pd/C catalysts containing chalcogens have been synthesized and tested for oxygen reduction and the results have been analyzed based on changes in the palladium phase. Selenium addition to the catalyst promotes the oxygen reduction due to the modification of the palladium surface. However, sulfur reduces the oxygen reduction activity to a great extent as a result of semi-amorphous palladium phase formation. Both PdS x /C and PdSe x /C are highly methanol tolerant.
ISSN:1388-2481
1873-1902
DOI:10.1016/j.elecom.2007.06.005