Carbon Vulcan XC72 is still considered as the standard catalyst support in gas diffusion electrodes for low temperature polymer fuel cell applications. Because of its relatively low specific area and poor corrosion resistance, alternative materials such as carbon nanotubes (CNTs) are currently the focus of numerous investigations. This work reports on the test of single-walled carbon nanotubes (SWCNTSs) as Pt and PtRu catalyst support in the direct methanol fuel cell (DMFC) anode. After the treatment of the CNTs in air at
300°C
or in a high concentrated nitric acid solution, power densities of 152 and
157mWcm−2
have been reached under DMFC conditions at
2barabs
and
80°C
. The anodic and cathodic Pt loadings amounted to
1mgcm−2
. The performance of the membrane electrode assembly (MEA) with a PtRu–SWCNT anode was about 10–15% higher than that of the MEA with a conventional as-prepared PtRu–Vulcan XC72 system. This was principally ascribed to higher catalyst utilization, lower impedance, and methanol crossover of the carbon-nanotube-based electrodes compared to those of the carbon-Vulcan-based one.
Kohlenstoff-VulcanXC72 gilt derzeit als Standard-Katalysatorträger in der Niedertemperatur-Brennstoffzelle. Aufgrund seiner relativ niedrigen spezifischen Oberfläche sowie seiner Korrosionsanfälligkeit ist man zurzeit auf der Suche nach Ersatzmaterialien. In diesem Beitrag wird über den Einsatz von Kohlenstoff-Nanoröhren als PtRu-Katalysatorträger in der DMFC-Anode berichtet. Nach chemischer Vorbehandlung der Kohlenstoff-Nanoröhren in Luft bei 300°C bzw. in konzentrierter Salpetersäure wurde eine Zellleistung von 152 bzw.157 mW cm -2 bei einer anodischen und kathodischen Pt-Beladung von 1 mg cm -2 ermittelt.Dies entspricht einer um ca. 10 % höheren Leistung im Vergleich zu einer Membran-Elektroden-Einheit (MEE) mit einer PtRu-Vulcan-Anode.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.