Can a liquid be used to de orbit debris? Can a liquid be used to slow a satellite to loose orbit by adding or taking momentum from a satellite, a type of devise that releases a liquid that expands and solidified adding surface area making more drag and or by adding weight?
Temperature is not the only factor for matter phases, pressure does make a difference too. 

As space is practically a vacuum, thus pressure is zero. As far as I know, there can be no liquids in the vacuum of space. No element nor compound is liquid in zero pressure no matter what the temperature might be. The best candidate for this would be Helium, but even in this case the vacuum of space cannot keep equilibrium between liquid and gas phases, and thus all liquid helium will evaporate into gas. 

Liquid could exist in space, if it would be able to collapse on its own gravity and maintain gaseous atmosphere bound to the liquid body. This would require way more matter than is feasible for your purpose, however. 

EDIT: Also adding mass to an orbiting object does not in general cause its orbit to decay, as mass does not significant role in orbit equation. Gravitational force IS proportional to product of masses, but then again acceleration is force divided by mass - ie it gets cancelled out; applies only if adding mass does not significantly change the barycenter of said two objects (ignoring relativistic effects and gravitational waves since obviously far outside the scope of this question)

Adding surface area does not affect orbit in vacuum since there is no drag nor friction. Also shape of the object does not matter for the very same reason. 

EDIT 2: As noted in comments, liquids may remain liquids in vacuum long enough for this scenario. I couldn’t find very good references how this might look like in the vacuum of space, but seemingly water can exist as a liquid for extended periods of time in very low pressures, see eg https://www.hou.usra.edu/meetings/lpsc2014/pdf/2060.pdf which states that 250ml of liquid water did fully evaporate in about 2.5 hours in 0.003 arm (Personally I find this very surprising and contradicting to my prior knowledge but I have been wrong many times before)