Question

write about the Catalytic activity​

Answer 1

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Due to increase in surface area with decrease in particle size, nanomaterial-based catalysts show increased catalytic acitivity. Usually they are heterogeneous catalysts that means catalysts are in solid form and the reactions occur on the surface of the catalyst. Nanoparticle catalysts can be easily separated and can be recycled. Example, Pd, Pt metal nanoparticles used in hydrogenation reactions.

TiO2 , ZnO are used in photocatalysis. Gold in bulk form is unreactive, but gold nanoparticles are found to be very good catalyst for various organic reactions.