Abstract: Supported palladium phthalocyanine was found to be an interesting catalyst with good catalytic stability for selective conversion of CCl₂F₂ into CH₂F₂. Particularly, supported palladium phthalocyanine exhibited excellent stability even at low H₂/CCl₂F₂ ratio in the corrosive reaction conditions due to the formation of HCl and HF. Relatively high selectivities towards CH₂F₂ formation (>75%) over palladium phthalocyanine catalysts with fluoride supports were achieved. The fractionally reduced palladium in palladium phthalocyanine was suggested to be the main active site for catalytic hydrodechlorination.