The synchronous construction of metal phosphate and phosphorus-doped carbon structures is of great significance to innovate the design,synthesis,and application of catalysts,as these phosphorus-containing composite materials have shown a remarkable contribution to electrocatalysts.However,their preparation procedure generally involves using large amounts of excess phosphorus sources for phosphorization,which inevitably release poisonous PH3 or dangerous phosphorus vapor.Here,a strat-egy for in-situ formation of FePO4 embedded in P-doped carbon 2D nano film(FePO4/PdC)is developed using a highly integrated precursor,which is a small molecular organophosphine ligand,1,1'bis(diphenylphosphine)ferrocene(DPPF).The multi-source precursor DPPF that contains Fe,P,and C is molecular-vapor-deposited on the nickel foam(NF)supported ZIF-67 nanosheets to obtain the composite catalyst,namely DPPF-500/ZIF-67/NF.FePO4/PdC encapsulated the ZIF-67 derived Co/N-doped carbon matrix(CoNC)to form a sandwich structure FePO4/PdC@CoNC.The constructed catalyst shows good per-formance for OER,requiring an overpotential of only 297 mV to deliver 600 mA/cm2 with a Tafel slope of 42.7 mV dec-1.DFT calculations demonstrate that the synergistic effects between the metal active center and P-doped carbon film reduce the energy barriers and improve electron transport.This method of con-structing P-containing catalysts overcomes the demand for additional P sources to realize eco-friendly fabrication and yields a unique structure with good catalytic activity.

Zejun Sun;Wenjuan Xu;Liutao Guo;Qiang Han;Jianyi Gao;Jiaping Wang;Yanru Feng;Chengrui Li;Qionglin Liang;Hong-bin Sun;Yang Yang

Department of Chemistry,Northeastern University,Shenyang 110819,Liaoning,China;Key Laboratory of Bioorganic Phosphorus Chemistry&Chemical Biology(Ministry of Education),Department of Chemistry,Center for Synthetic and Systems Biology,Tsinghua University,Beijing 100084,China;Astronaut Centre of China,Beijing 100094,China;NanoScience Technology Center,Department of Materials Science and Engineering,Department of Chemistry,Renewable Energy and Chemical Transformation Cluster University of Central Florida,Orlando,FL 32826,United States

能源化学

[1]Zejun Sun;Wenjuan Xu;Liutao Guo;Qiang Han;Jianyi Gao;Jiaping Wang;Yanru Feng;Chengrui Li;Qionglin Liang;Hong-bin Sun;Yang Yang-.Organophosphine ligand derived sandwich-structural electrocatalyst for oxygen evolution reaction)[J].能源化学,2022(07):74-83

Organophosphine,PdC,organophosphine,DPPF,CoNC

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