We present an X-ray absorption spectroscopy (XAS) study of a low Pt content catalyst layer(Pt loading 0.1 mg c2) operating at the cathode of a proton exchange membrane fuel cell(PEMFC). This catalyst is based on the use of a mesoporous inorganic matrix as a support forthe catalyst Pt nanoparticles. Due to the high Pt dilution, in situ measurements of itsstructural properties by XAS are challenging and suitable experimental strategies must be devised for thispurpose. In particular, we show that accurate XAS in situ fluorescence measurements can beobtained using an optimized fuel cell, suitable protocols for alignment of a focused X-ray beamand an appropriate filter for the background signal of the other atomic species contained in theelectrodes.
Authors
- Emiliano Principi,
- dr hab. inż. Agnieszka Witkowska link open in new tab ,
- Sonia Dsoke,
- Roberto Marassi,
- Andrea Di Cicco
Additional information
- DOI
- Digital Object Identifier link open in new tab 10.1039/b915086b
- Category
- Publikacja w czasopiśmie
- Type
- artykuł w czasopiśmie wyróżnionym w JCR
- Language
- angielski
- Publication year
- 2009
