Polarization-Switchable Electrochemistry of 2D Layered Bi₂O₂Se Bifunctional Microreactors by Ferroelectric Modulation.

ABSTRACT: Ferroelectric catalysts are known for altering surface catalytic activities by changing the direction of their electric polarizations. This study demonstrates polarization-switchable electrochemistry using layered bismuth oxyselenide (L-Bi₂O₂Se) bifunctional microreactors through ferroelectric modulation. A selective-area ionic liquid gating is developed with precise control over the spatial distribution of the dipole orientation of L-Bi₂O₂Se. On-chip microreactors with upward polarization favor the oxygen evolution reaction, whereas those with downward polarization prefer the hydrogen evolution reaction. The microscopic origin behind polarization-switchable electrochemistry primarily stems from enhanced surface adsorption and reduced energy barr

SUBMITTER: Chiang CH 

PROVIDER: S-EPMC11378338 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature