Dear All,
I have prepared trimetallic PdAgNi nanoparticles supported on carbon in addition to their monometallic Pd/C and Ag/C counterparts. I am having some issues with the XRD pattern with the Ag/C pattern shown in the attached figure. There is a double-peak at 44 degrees, At this diffraction angle the Ag (200) is expected. I can not comprehend having two peaks around this facet while the other three facets (111), (220), and (311) have only one peak each.
Each of these was prepared by the borohydride co-reduction method while using KBr as a capping agent. The reaction was undertaken at room temperature for 30 min.
An idea why there are two peaks on the Ag pattern around 44 degrees?
Also, any idea about the intense and broader peaks on the trimetallic sample? The intense ones seem to represent Ag while the broader ones are probably due to Pd. Any idea about the potential of nanoalloy formulation by investigating this XRD patterns?
Thanks for your attention,
Ahmed
Ahmed Elsheikh
Look for silver oxide, Ag2O as well as the metals. Split peaks may also indicate misalignment of the system.
Maybe mixed phase or purity problem? I recommend check other patterns too.
Dear Ahmed Elsheikh ,
please have a look at the width of the additional peak. It is very small compared to the others. So the associated crystallite size is much larger than that of your NPs.
At about 45° the 220 Si peak is located (Cu target assumed) ; so you may comment on what material your sample support is made of (support below the C coverage).
You may also comment on the sample thickness.
- Badges
- Science topic
- Similar topics
- Physics
- Condensed Matter Physics
- Solid State Physics
- PEAKS