Ferroelectric Photocatalysis for Energy Conversion

Ferroelectric photocatalysis harnesses the intrinsic polarisation of ferroelectric materials to create internal electric fields that drive the separation and directed migration of photogenerated charge carriers. This mechanism mitigates electron–hole recombination, enhances light-induced redox reactions and enables efficient solar-to-chemical energy conversion. Key processes include overall water splitting to produce hydrogen and oxygen, and the photoreduction of CO₂ into value-added fuels. Advances in domain engineering, dopant gradients and interface modification have yielded substantial improvements in activity and stability, positioning ferroelectric systems as promising candidates for sustainable energy applications and carbon-neutral fuel production.

Research from Nature Portfolio

Recent studies have exploited spontaneous polarisation in layered bismuth-titanate nanosheets to regulate the assembly of single-atom catalysts. Periodic one-dimensional arrays of gold atoms on Bi₄Ti₃O₁₂ demonstrate a significant reduction in reaction energy barriers and an ∼18-fold enhancement in CO₂-to-CO conversion rates compared with unmodified material. A complementary strategy employs gradient tungsten doping in Bi₃TiNbO₉ to introduce an additional built-in field along the c-axis while amplifying the in-plane depolarisation field, thereby achieving efficient anisotropic carrier migration for robust overall water splitting. More recently, selective growth of SrTiO₃ nanolayers on positively polarised facets of PbTiO₃ has been shown to passivate defect sites, extend electron lifetimes into the millisecond range and attain record apparent quantum yields for solar water splitting.

Ferroelectric Photocatalysis for Energy Conversion publication trend

The graph below shows the total number of articles in ferroelectric photocatalysis for energy conversion across all publications each year (not limited to Nature Index journals).

Technical terms

Ferroelectric polarization: Spontaneous and reversible electric dipole moment within certain crystalline materials.

Depolarisation field: Internal electric field that opposes spontaneous polarisation, influencing charge-separation dynamics.

Built-in electric field: Inherent potential gradient created by compositional or structural asymmetry, guiding charge carriers.

Photogenerated charge carriers: Electrons and holes produced when a semiconductor absorbs photons.

Single-atom catalyst: A catalytic system where isolated metal atoms are dispersed on a support to maximise active site utilisation.

References

1. Polar materials for photocatalytic applications: A critical review. Interdisciplinary Materials (2024).
2. One-dimensional single atom arrays on ferroelectric nanosheets for enhanced CO2 photoreduction. Nature Communications (2024).
3. Gradient tungsten-doped Bi3TiNbO9 ferroelectric photocatalysts with additional built-in electric field for efficient overall water splitting. Nature Communications (2023).
4. Selective Exposure of Robust Perovskite Layer of Aurivillius‐Type Compounds for Stable Photocatalytic Overall Water Splitting. Advanced Science (2023).
5. Manipulating Ferroelectric Polarization and Spin Polarization of 2D CuInP2S6 Crystals for Photocatalytic CO2 Reduction. Journal of the American Chemical Society (2024).