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Chemical Synthesis of Porous Barium Titanate Thin Film and Thermal Stabilization of Ferroelectric Phase by Porosity-Induced Strain
Published on: March 27, 2018
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Molecular catalysis at polarized interfaces created by ferroelectric BaTiO3
Eugene S Beh1, Sergey A Basun2,3, Xiaofeng Feng1
1Department of Chemistry , Stanford University , 337 Campus Drive , Stanford , California 94305 , USA .
Chemical Science
|May 30, 2017
Summary
Ferroelectric nanoparticles create polarized interfaces in liquids, influencing chemical reaction selectivity without external voltage. This offers a new method for controlling non-faradaic reactions using dispersible materials.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Polarized solid-liquid interfaces enable control over non-faradaic reactions.
- Conventional methods using electrodes require high surface charge densities and face challenges in suppressing unwanted faradaic reactions.
- Ferroelectric materials possess inherent surface charge densities due to domain dipole moments, offering an alternative for interface polarization.
Purpose of the Study:
- To investigate the influence of ferroelectric oxides on the selectivity of non-faradaic reactions.
- To explore the use of ferroelectric materials as a voltage-free method for creating polarized solid-liquid interfaces.
Main Methods:
- Studied a Rh porphyrin-catalyzed carbene rearrangement.
- Introduced ferroelectric barium titanate (BaTiO3) nanoparticles into the reaction solution.
- Compared selectivity changes with reactions performed at electrochemically polarized interfaces.
Main Results:
- Addition of BaTiO3 nanoparticles altered the product ratio of the carbene rearrangement.
- The observed change in product ratio was comparable to that achieved at a voltage-polarized electrode-electrolyte interface.
- Colloidal BaTiO3 nanoparticles effectively acted as a dispersible polarized interface.
Conclusions:
- Ferroelectric nanoparticles can establish polarized solid-liquid interfaces without external electrical bias.
- These interfaces can successfully influence the selectivity of non-faradaic reactions.
- Colloidal ferroelectric suspensions provide a versatile platform for controlling chemical selectivity.
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