On the happiness of ferroelectric surfaces and its role in water dissociation: The example of bismuth ferrite
- Journal Article
Rights / licenseCreative Commons Attribution 4.0 International
We investigate, using density functional theory, how the interaction between the ferroelectric polarization and the chemical structure of the (001) surfaces of bismuth ferrite influences the surface properties and reactivity of this material. A precise understanding of the surface behavior of ferroelectrics is necessary for their use in surface science applications such as catalysis as well as for their incorporation in microelectronic devices. Using the (001) surface of bismuth ferrite as a model system, we show that the most energetically favored surface geometries are combinations of surface termination and polarization direction that lead to uncharged stable surfaces. On the unfavorable charged surfaces, we explore the compensation mechanisms of surface charges provided by the introduction of point defects and adsorbates, such as water. Finally, we propose that the special surface properties of bismuth ferrite (001) could be used to produce an effective water splitting cycle through cyclic polarization switching. © 2021 Author(s). Show more
Journal / seriesThe Journal of Chemical Physics
Pages / Article No.
PublisherAmerican Institute of Physics
Organisational unit03903 - Spaldin, Nicola A. / Spaldin, Nicola A.
744027 - Properties across dimensions: an atomistic computational study of bismuth ferrite surfaces and nanocrystals (EC)
810451 - Hidden, entangled and resonating orders/HERO (EC)
MoreShow all metadata