Which mechanism causes increased catalytic activity when metal nanoparticles are deposited on a reducible oxide support?

💡 Explanation

When metal nanoparticles interact with a reducible oxide support, charge transfer occurs, altering the electron density and filling the d-band of the metal, thus enhancing catalytic activity. Therefore, charge transfer is the cause, rather than the other options, as they require different mechanisms not directly resultant from the metal-support interaction.

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