ZIF-Co₃O₄@ZIF-Derived Urchin-Like Hierarchically Porous Carbon as Efficient Bifunctional Oxygen Electrocatalysts.

ABSTRACT: Co₃O₄ nanoparticles were sandwiched into interlayers between ZIF-8 and ZIF-67 to form ZIF-Co₃O₄@ZIF precursors. Pyrolysis of ZIF-Co₃O₄@ZIF yielded an urchin-like hierarchically porous carbon (Co@CNT/NC), the thorns of which were carbon nanotubes embedded Co nanoparticles. With large specific surface area and hierarchically porous structure, as-prepared Co@CNT/NC exhibited excellent bifunctional oxygen electrocatalytic performances. It has good ORR performance with E_1/2 of 0.85 V, which exceeds the Pt/C half-wave potential (E_1/2=0.83 V). In addition, Co@CNT/NC has an OER performance close to that of RuO₂. To further demonstrate the effect of Co modifying on the properties, the samples were sub

SUBMITTER: Zhang L 

PROVIDER: S-EPMC11467739 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature