One-step conversion of tannic acid-modified ZIF-67 into oxygen defect hollow Co₃O₄/nitrogen-doped carbon for efficient electrocatalytic oxygen evolution.

ABSTRACT: Controllable structure and defect design are considered as efficient strategies to boost the electrochemical activity and stability of catalysts for the oxygen evolution reaction (OER). Herein, oxygen defect hollow Co₃O₄/nitrogen-doped carbon (O_V-HCo₃O₄@NC) composites were successfully synthesized using tannic acid-modified ZIF-67 (TAMZIF-67) as the precursor through a one-step pyrolysis. Tannic acid provides abundant oxygen during the pyrolysis process of the modified ZIF-67, which can contribute to the formation of oxygen defects and the construction of a hollow structure. The existence of oxygen defects is shown by X-ray photoelectron spectroscopy and electron paramagnetic resonance, whereas the hollow structure is confirmed by tran

SUBMITTER: Wang C 

PROVIDER: S-EPMC9057370 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature