Yes but. Converting CO2 to anything still requires an energy source with a non-trivial amount of Joules/kg of CO2 fixed. This is in addition to any energy req

Yes but. Converting CO2 to anything still requires an energy source with a non-trivial amount of Joules/kg of CO2 fixed. This is in addition to any energy required to make a catalyst or maintain potency of the catalyst. If you are using chemicals, you need energy to make those consumable chemicals. Nothing is free. There are no free lunches for this. If it's not light from the Sun, it has to be from something else: fossil or nuclear being the best high density (i.e. faster more scaleable production source of energy). Nothing is free. There are no free lunches for this.