In the quest for low-temperature polyolefins upcycling,overcoming the decomposition temperature limitations caused by chemically inert carbon-hydrogen(C(sp3)-H)bonds remains a challenge.Here we report a tandem endothe...In the quest for low-temperature polyolefins upcycling,overcoming the decomposition temperature limitations caused by chemically inert carbon-hydrogen(C(sp3)-H)bonds remains a challenge.Here we report a tandem endothermicexothermic magnetocatalytic(EEM)strategy for upcycling of polypropylene(PP)and polyethylene(PE)below their decomposition temperature(typically 300°C).A series of commodity polyolefins(PP,PE,and their mixtures(PP+PE))can be deconstructed magnetocatalytically at 290°C,for which a high H2 selectivity up to 86%can be achieved.Magnetothermal coupling simulations revealed that the interfacial temperature gap was the key to upcycling of polyolefins at low temperature.Overall,EEM method potentially provides a sustainable approach for end-of-life plastics upcycling.展开更多
基金the National Key R&D Program of China(No.2018YFB1501404)the National Natural Science Foundation of China(No.52306293)+2 种基金Shenzhen Science and Technology Program(No.JCYJ20240813151118024)post-doctoral research grants for post-doctoral fellows to stay(come)to Shenzhen(szbo202318)the extended help from the Instruments Center for Physical Science of University of Science and Technology of China.
文摘In the quest for low-temperature polyolefins upcycling,overcoming the decomposition temperature limitations caused by chemically inert carbon-hydrogen(C(sp3)-H)bonds remains a challenge.Here we report a tandem endothermicexothermic magnetocatalytic(EEM)strategy for upcycling of polypropylene(PP)and polyethylene(PE)below their decomposition temperature(typically 300°C).A series of commodity polyolefins(PP,PE,and their mixtures(PP+PE))can be deconstructed magnetocatalytically at 290°C,for which a high H2 selectivity up to 86%can be achieved.Magnetothermal coupling simulations revealed that the interfacial temperature gap was the key to upcycling of polyolefins at low temperature.Overall,EEM method potentially provides a sustainable approach for end-of-life plastics upcycling.
