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Deactivation resistant Pd-ZrO2 supported on multiwall carbon nanotubes catalyst for direct formic acid fuel cells

A. Malolepszy ; M. Mazurkiewicz ; L. Stobinski ; B. Lesiak ; L. Kover ; J. Toth ; B. Mierzwa ; A. Borodzinski ; Florian Nitze (Institutionen för kemi och kemiteknik, Teknisk ytkemi) ; T. Wagberg
International Journal of Hydrogen Energy (0360-3199). Vol. 40 (2015), 46, p. 16724-16733.
[Artikel, refereegranskad vetenskaplig]

One of the main problems of palladium based catalysts for a direct formic acid fuel cell (DFAFC) is their low stability during a long-term operation. In these studies, the Pd-ZrO2 catalyst supported on the multiwall carbon nanotubes (MWCNTs) was prepared and thermo-chemically treated. These catalysts were tested in a fuel cell for formic acid electrooxidation, and their chemical composition and structure were characterised by the XPS, STEM, HR-TEM and XRD techniques. It was found that the Pd-ZrO2/MWCNTs catalyst after synthesis causes oscillations of the cell voltage during operation resulting in significantly higher deactivation resistance than that of Pd/MWCNTs. This may be attributed to the "self-cleaning" mechanism of poisoned Pd catalyst by carbon monoxide through the electrochemical oxidation of COads (adsorbed) to CO2 (gas).

Nyckelord: Pd-ZrO2/MWCNTs, Direct formic acid fuel cell, Deactivation resistance, Spontaneous voltage



Denna post skapades 2016-01-21.
CPL Pubid: 231043

 

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Institutioner (Chalmers)

Institutionen för kemi och kemiteknik, Teknisk ytkemi

Ämnesområden

Kemi

Chalmers infrastruktur