Improved Interface Charge Transfer and Redistribution in CuO-CoOOH p-n Heterojunction Nanoarray Electrocatalyst for Enhanced Oxygen Evolution Reaction.

ABSTRACT: Electron density modulation is of great importance in an attempt to achieve highly active electrocatalysts for the oxygen evolution reaction (OER). Here, the successful construction of CuO@CoOOH p-n heterojunction (i.e., p-type CuO and n-type CoOOH) nanoarray electrocatalyst through an in situ anodic oxidation of CuO@CoS_x on copper foam is reported. The p-n heterojunction can remarkably modify the electronic properties of the space-charge region and facilitate the electron transfer. Moreover, in situ Raman study reveals the generation of SO₄ ^2- from CoS_x oxidation, and electron cloud density distribution and density functional theory calculation suggest that surface-adsorbed SO₄ ^2- can facilitate the OER process by enhancing

SUBMITTER: Hu J 

PROVIDER: S-EPMC8596130 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature