Discussion
Three of the following explain why nanoparticles are good catalysts. The exception is
Answer: C
Correct answer: their depressed melting point
A lower melting point is a genuine nanoscale effect but it works against catalytic use rather than for it: it is exactly why nanoparticle catalysts sinter and lose activity at high temperature. The three real reasons are the large area per unit mass, the unsatisfied surface bonds, and the high proportion of edge and corner atoms.
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