Is it possible to use carbon monoxide as propellant for a rocket?
For example, carbon dioxide from the atmosphere of Mars could be transformed to carbon monoxide and oxygen via photochemical reduction using a photocatalytic process, and unlike the Sabatier reaction (producing methane), precious water is not consumed in the process.
Could the resulting products then be used as a potential bi-propellant?
$$2\,{\rm CO}_2 + 2h\nu\ \to\ 2\,{\rm CO} + {\rm O}_2$$
There may be issues of storage of LOX or LCO, but provided those are addressed somehow, could a rocket engine or thruster use these effectively?