Ferroelectric polarization and thin-layered structure synergistically promoting CO₂ photoreduction of Bi₂MoO₆

Abstract

Ferroelectric field and thin-layered structure greatly accelerate charge transfer from the bulk to the surface and enrich catalytic sites, synergistically boosting CO2 photoreduction activity of Bi2MoO6.

Photocatalysis Enhanced by External Fields

“…Fori nstance,P ark et al prepared polarized K 0.5 Na 0.5 NbO 3 powder via ac orona-poling process and achieved as ignificantly enhanced photocatalytic H 2 production rate of % 0.47 mmol g À1 h À1 ,w hich is 7.4 times higher than that of the non-poled sample (Figure 8b). [53] Thestrong ferroelectric field originated from the alignment of the ferroelectric domains under the electric field provides an effective driving force to separate photogenerated electrons and holes in the bulk phase (Figure 8c). Our group reported the introduction of strong ferroelectric polarization in thin-layered Bi 2 MoO 6 by corona poling.…”

Inside‐and‐Out Semiconductor Engineering for CO2 Photoreduction: From Recent Advances to New Trends

“…In addition, Bi 2 MoO 6 ultrathin nanosheets (BMO‐U) with boosted ferroelectricity were developed for CO evolution from CO 2 photoreduction. [ 463 ] Due to lattice distortion in ultrathin layered structure, the polarization degree of BMO‐U can be further enhanced by corona poling, which causes a boosted polarized electric field along the a and c axes in BMO‐U, promoting the charge separation between layers. Thus, the CO yield of polarized BMO‐U (14.38 mmol g −1 h −1 ) was over 3 times larger than that of bulk Bi 2 MoO 6 (4.08 mmol g −1 h −1 ), and over as 10 times as higher than that of bulk Bi 2 MoO 6 (1.36 mmol g −1 h −1 ).…”

Photocatalysis Enhanced by External Fields

“…Fori nstance,P ark et al prepared polarized K 0.5 Na 0.5 NbO 3 powder via ac orona-poling process and achieved as ignificantly enhanced photocatalytic H 2 production rate of % 0.47 mmol g À1 h À1 ,w hich is 7.4 times higher than that of the non-poled sample (Figure 8b). [53] Thestrong ferroelectric field originated from the alignment of the ferroelectric domains under the electric field provides an effective driving force to separate photogenerated electrons and holes in the bulk phase (Figure 8c). Our group reported the introduction of strong ferroelectric polarization in thin-layered Bi 2 MoO 6…”