Yes, but in this case, we are talking about a substance that is already present in abundance in the chamber. Not a catalyst.
If this were a gasoline engine we could use a single port throttle body injection system, and place a silver and platinum wire screen under the throttle body, that would totally atomize the fuel, and see tremendous improvement. I used to do that on my gas dragsters a long time ago, and it worked well.
There is no free hydrogen inside the chamber of a gas powered vehicle.
(actually, a slightly technically incorrect statement because there is an incredibly small, almost immeasurable amount of free hydrogen it the air around us. Mostly resulting from the breakdown of water molecules by ultraviolet light. This happens in the far upper atmosphere far more than down here.)