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Question
Write a short note on the catalytic activity of nanoparticles.
Solution
Catalytic activity of nanoparticles:
- Due to an increase in surface area with a decrease in particle size, nanomaterial-based catalysts show increased catalytic activity.
- Usually, they are heterogeneous catalysts that mean 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.
e.g. 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 a very good catalyst for various organic reactions.
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\[\ce{CH3 - CH - CH2 + HBr -> \underset{(major)}{\underline{}\underline{}\underline{}\underline{}} + \underset{(minor)}{\underline{}\underline{}\underline{}\underline{}}}\]
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