You want to go from 12V@1 amp and end up with 24V@2 amps, how does that add up? 
DC to DC converters are a very advanced topic.
Suggest you either start with 24V and go down to 12V if needed.
Or
Buy a ready made converter.
You want to go from 12V@1 amp and end up with 24V@2 amps, how does that add up?
DC to DC converters are a very advanced topic.
Suggest you either start with 24V and go down to 12V if needed.
Or
Buy a ready made converter.