Catalysts work upon activation, and the activation comes when you connect the carbons or atoms to each other. Think of water and sand, they are interactive, yes?
Now if you were to have a catalyst where you take gold and silver, for example, you would find that there is no reaction, but resistance. The resistance - no not the Frenchies in the war - would be where they fail to catlise or whatever, meaning that they would resist occupying the same area. If there is resistance, and not 'fusion', then there will be no reaction, but rather rejection of bonding - they are not soluble, interactive, or, in simple English, they will not mix.
I hope you can agree with me, or, tell me where I am wrong...
