Deactivation resistant Pd-ZrO2 supported on multiwall carbon nanotubes catalyst for direct formic acid fuel cells
Artikel i vetenskaplig tidskrift, 2015

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).

Pd-ZrO2/MWCNTs

Deactivation resistance

Spontaneous voltage

Direct formic acid fuel cell

Författare

A. Malolepszy

M. Mazurkiewicz

L. Stobinski

B. Lesiak

L. Kover

J. Toth

B. Mierzwa

A. Borodzinski

Florian Nitze

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Teknisk ytkemi

T. Wagberg

International Journal of Hydrogen Energy

0360-3199 (ISSN)

Vol. 40 46 16724-16733

Ämneskategorier

Kemi

DOI

10.1016/j.ijhydene.2015.08.048

Mer information

Skapat

2017-10-07