Supported palladium phthalocyanine was found to be an interesting catalyst with good stability for selective conversion of CCl2F2 into CH2F2 under flowing hydrogen. Relatively high selectivities towards CH2F2 formation over palladium phthalocyanine catalysts with fluoride supports were achieved at limited conversion levels (<10%). Particularly, supported palladium phthalocyanine exhibited excellent stability even at low H-2/CCl2F2 molar ratio in the corrosive reaction conditions due to the formation of HCl and HE The fractionally reduced palladium in palladium phthalocyanine was suggested to be the main active site for the catalytic hydrodechlorination. (C) 2002 Elsevier Science B.V. All rights reserved.