Andrey Mello dos Santos

3 Questions 9 Answers 0 Followers

Questions related from Andrey Mello dos Santos

What is the average depth explored in metal oxide samples through the following characterization techniques: XRD, XPS and Raman spectroscopy?

Obviously, the exact depth evaluated by each characterization technique mentioned (XRD, XPS and Raman spectroscopy) depends on the specific parameters adopted for each analysis. However, in...

16 May 2020 6,564 16 View

What is the influence of magnetic properties on the metal-support interaction in supported Ni/Al2O3 catalysts?

I have obtained samples with ferromagnetic behavior (presence of Ni predominantly in the metallic state over the alumina surface) and paramagnetic (in which Ni is oxidized in NiO form is alumina...

14 March 2020 3,718 4 View

Metallic materials (more specifically, nickel) present characteristic peaks in Raman spectroscopy analysis?

When evaluating an alumina sample using Raman spectroscopy, characteristic peaks were obtained for certain wavelengths. However, after depositing a thin nickel film via plasma on the surface of...

25 January 2020 9,095 3 View