A dual-active NiO–Ce1−xNixO2 nanocomposite for catalytically upcycling PET into H2

ANiO₃ (A = La, Ce, and Sr) perovskites were innovatively synthesized for catalytic steam reforming of polyethylene terephthalate (PET) following non-catalytic decomposition. CeNiO₃, featuring a dual-active NiO-Ce_1-xNi_xO₂ nanocomposite with moderate oxygen vacancies, achieved a high H₂ yield of 54.58 mmol g_PET^-1 and a carbon conversion efficiency of 83.13%.