Two-dimensional ferroelectric metal for electrocatalysis

Abstract

The coexistence of metallicity and ferroelectricity has been an intriguing and controversial phenomenon as these two material properties are considered incompatible in bulk. We clarify the concept of ferroelectric metal...

Progress on Emerging Ferroelectric Materials for Energy Harvesting, Storage and Conversion

“…[253] Obviously, the FE metals with electrically-tunable electronic states serve as a novel template for probing efficient electrocatalysis and electrochemical energy conversion. [202,254]…”

Depolarization induced III–V triatomic layers with tristable polarization states

“…We find that the ferroelectric phase is a semimetal, while the antiferroelectric phase is a semiconductor with a band gap of 0.7 eV. The semimetal nature of the ferroelectric phase is due to the built-in depolarization field that induces band bending 50,51 such that the valence band maximum (VBM) and the conduction band minimum (CBM) are dominated by the states of P − and P + surfaces, respectively (Fig. 3b).…”

Tunable hydrogen evolution activity by modulating polarization states of ferroelectric BaTiO3

“…14,22 Computational studies have played critical roles in understanding the structure-performance relationship of ferroelectric catalysts as well as predicting the catalytic performance of heterogeneous catalysis and, more importantly, they can guide the search for catalysts with optimum performance before tedious trial-and-error experiments are conducted. 14,[23][24][25][26][27][28][29] For example, based on density-functional theory (DFT) calculations, Kou et al examined the photocatalytic water splitting performance of the 2D AgBiP 2 Se 6 monolayer. 24 It was found that the ferroelectric AgBiP 2 Se 6 monolayer is not favorable for the HER, yet it shows reactivity towards the oxygen evolution reaction (OER).…”