Question

14. Adsorption of dihydrogen takes place on the
nickel surface. Which of the following
processes is involved in the above statement?​

Answer 1

Answer:

OK but what it mean please tellme

Answer 2

Answer:

The adsorption of dihydrogen on the nickel surface involves physisorption followed by chemisorption.

Explanation:

• Physical adsorption at low temperatures may convert to chemisorption as the temperature rises.
• Van der Waals forces, for example, adsorb dihydrogen on nickel first.
• Hydrogen molecules breakdown to generate hydrogen atoms, which chemisorption holds on the surface.
• LEED, energy loss spectroscopy, flash desorption, and work function measurements, as well as the technique of laser induced thermal desorption, were used to investigate hydrogen adsorption on Ni(111), (100), and (110) surfaces.
• The formation of disordered adsorbed layers is indicated by noticeable variations in the LEED intensities for Ni(111) and (100), whereas the formation of "streaked" diffraction patterns and (at high coverages) of a 12 structure was observed for Ni(110).
• The intensity of the surface plasmon excitation is strongly dampened by hydrogen adsorption, resulting in the formation of an electron loss peak approximately 15 eV.

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