Deactivation resistant Pd-ZrO2 supported on multiwall carbon nanotubes catalyst for direct formic acid fuel cells
2015 (English)In: International journal of hydrogen energy, ISSN 0360-3199, E-ISSN 1879-3487, Vol. 40, no 46, 16724-16733 p.Article in journal (Refereed) PublishedText
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).
Place, publisher, year, edition, pages
Elsevier, 2015. Vol. 40, no 46, 16724-16733 p.
Pd-ZrO2/MWCNTs, Direct formic acid fuel cell, Deactivation resistance, Spontaneous voltage oscillation, Electrochemical oxidation
IdentifiersURN: urn:nbn:se:umu:diva-114625DOI: 10.1016/j.ijhydene.2015.08.048ISI: 000366774000090OAI: oai:DiVA.org:umu-114625DiVA: diva2:900460