Answer:
False, just heterogeneous.
Explanation:
Hello,
Ozone layer degradation by the CFC molecules occur in gaseous phase since no liquids or solids are involved at those stratospheric conditions. In addition, that is a chemical reaction undergoing by itself as long as the ozone ([tex]O_3[/tex]) is pretty much chemically unstable, so there is no necessity of a catalyst.
Best regards.