The binding energy of chemisorbed oxygen on metal surface is different than that of metallic oxide. So what is the difference between these two ?
In metal oxide the cations are in different valence states unlike in the case of metal, which leads to the difference
in binding energy.
The following link may be useful for you https://www.researchgate.net/publication/261441629_Different_Reactivity_of_the_Various_Platinum_Oxides_and_Chemisorbed_Oxygen_in_CO_Oxidation_on_Pt111
Yes, I agree with Manoj Kumar Yadav , the difference is due to difference in valence state of cations in both metal oxides & metals.
Agree with Manoj Kumar Yadav and would like to be a bit specific. Metal oxides have either ionic or covalent bonds between the metal and oxygen atoms depending on the oxidation number of the metal atoms, whereas pure metals have a metallic bond where several free electrons are shared among the metal atoms. As you can imagine, the chemisorption on these different surfaces can be very different. I speculate that on the oxides it may occur only at specific atom sites (i.e not at a Oxygen atom site and only at a metal atom site on the surface of a metal oxide or vice versa), whereas for pure metals there may be no such bias. A chemistry researcher may shed more light on this.
- Badges
- Science topic