Highly effective catalysts for the oxygen reduction reaction(ORR)and the oxygen evolution reaction(OER)are imperative in renewable technologies.The structural design of multifunctional electrocatalysts remains a huge ...Highly effective catalysts for the oxygen reduction reaction(ORR)and the oxygen evolution reaction(OER)are imperative in renewable technologies.The structural design of multifunctional electrocatalysts remains a huge challenge.Herein,a synthesis approach for hierarchical electrocatalysts is explored for embedding Co_(2)P nanoparticles and Fe–Nx species on hollow porous carbon spheres(Co_(2)P/Fe/NP–HCSs)by the pyrolysis of polystyrene@ZnCo-ZIF(PS@ZnCo-ZIF)composite precursors with the addition of PA and ferrocene.The combination of active species and hollow carbon structures endows Co_(2)P/Fe/NP–HCS electrocatalysts with prominent catalytic abilities for the ORR/OER.Co_(2)P/Fe/NP–HCSs show a positive half-wave potential(0.872 V)for the ORR while achieving a low overpotential(341 mV@10 mA cm^(−2))for the OER.Consequently,a Co_(2)P/Fe/NP–HCS-based Zn–air battery delivers high power density and desirable durability.This study provides a distinct synthetic strategy for preparing practical catalysts for energy conversion equipment.展开更多
基金Cooperative Project of Guangdong Provincial and Education Ministry through Industry and University Research(2006D90604001)The Innovating Key Item of Science and Technology in University of Guangdong Province(cxzd1023)~~
基金supported by the National Natural Science Foundation of China(No.52072139 and 21964007)the Natural Science Foundation of Hubei Province(No.2019CFB606)+1 种基金the Key Research and Development Program of Hainan Province-Social Development Direction(ZDYF2020204)the Innovation Platform for Academicians of Hainan Province.
文摘Highly effective catalysts for the oxygen reduction reaction(ORR)and the oxygen evolution reaction(OER)are imperative in renewable technologies.The structural design of multifunctional electrocatalysts remains a huge challenge.Herein,a synthesis approach for hierarchical electrocatalysts is explored for embedding Co_(2)P nanoparticles and Fe–Nx species on hollow porous carbon spheres(Co_(2)P/Fe/NP–HCSs)by the pyrolysis of polystyrene@ZnCo-ZIF(PS@ZnCo-ZIF)composite precursors with the addition of PA and ferrocene.The combination of active species and hollow carbon structures endows Co_(2)P/Fe/NP–HCS electrocatalysts with prominent catalytic abilities for the ORR/OER.Co_(2)P/Fe/NP–HCSs show a positive half-wave potential(0.872 V)for the ORR while achieving a low overpotential(341 mV@10 mA cm^(−2))for the OER.Consequently,a Co_(2)P/Fe/NP–HCS-based Zn–air battery delivers high power density and desirable durability.This study provides a distinct synthetic strategy for preparing practical catalysts for energy conversion equipment.
