I am just curious if Pt and Ru nanoparticles (5 wt.%) dispersed in a carbon powder using a combined wet chemical and thermal treatment could actually be present in the Raman spectrum.
There would be a possibility of finding RuO2 peak (possiblility of surface oxidation due to wet chemical and thermal treatment) in the composite but that would be supressed by carbon peak as the metal concentration is very less.
Hi.....Nikolaos, I think it is better you read this journal : Catalysts 2012, 2, 466-489; doi:10.3390/catal2040466 ; and http://diposit.ub.edu/dspace/bitstream/2445/55763/1/TFG_QU%20Broch,%20Mireia.pdf ; to get the point, thanks.
The interpretation from Raman may not be conclusive. It is better to confirm the presence of element using XPS.
Presumably not (except for the oxide peaks).
If you post a screen shot of your measurements, the community could help you with the identification of your unknown peaks. ;-)
PS: What's the size of the NPs? And can you give more details about your wet chemical and thermal treatment. I am thinking of a possible SERS effect of adsorbed solvents on your Pt NPs.
Nikolaos Kostoglou
The Raman signal is incredibly weak as it is, and I suspect even weaker for nanoparticles (< 100 nm) in low concentration (5 wt%) on a substrate. I'd say it's unlikely but please prove me wrong - I learn more that way...
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