A significant enhancement of bulk charge separation in photoelectrocatalysis by ferroelectric polarization induced in CdS/BaTiO₃ nanowires

Abstract

Efficient charge separation, in particular bulk charge separation (BCS), is one of the most critical factors in determining the performance of photoelectrochemical (PEC) water-splitting.

Lead-Free Compositional Engineering to Induce Polar Phase in Polymeric Piezoelectric Host for Energy Harvesting Devices

“…A freestanding, flexible BTO/PVDF composite film is shown in the inset of Figure c. A slight variation in film thickness was observed as BTO doping increased which was beyond the control of the fabrication process; however, the thickness does not affect piezo performance as it is driven by surface charges, and widely known textbook knowledge is that bulk charges become detrimental to the performance …”

“…A slight variation in film thickness was observed as BTO doping increased which was beyond the control of the fabrication process; however, the thickness does not affect piezo performance as it is driven by surface charges, and widely known textbook knowledge is that bulk charges become detrimental to the performance. 22 Structural Studies. The origin of the piezoelectricity in PVDF has attracted strong interest for flexible, environmentally friendly energy harvesting applications.…”

Doughty-electronegative heteroatom-induced defective MoS2 for the hydrogen evolution reaction

“…Furthermore, the interface reactions and electrode kinetics of the MoS 2 samples were clarified using Nyquist plots; they reveal a dramatically decreased charge-transfer resistance for N/Cl-MoS 2 compared with BM-MoS 2 and pristine MoS 2 . ( Jiang et al, 2021 ) As shown in Supplementary Table S3 , the impedance fitting data for the MoS 2 -based electrocatalyst was summarized. The results showed that N/Cl-MoS 2 exhibited a lower charge transfer resistance (R ct = 143Ω) and a faster electron transfer rate than those of pristine MoS 2 (R ct = 997 Ω) and BM-MoS 2 (R ct = 219 Ω), indicating that N/Cl-MoS 2 possessed a faster charge transfer capability in the HER.…”

Effective charge separation in photoelectrochemical water splitting: a review from advanced evaluation methods to materials design

“…This creates a spontaneous polarization (P s ) across the BFO lm, modulates the chemical potential and inuences the surface band bending, which are benecial for charge separation. 136,137 The charge separation efficiency of the positive-poled (2 V external maintained bias before LSV test) BiFeO 3 /Sn:TiO 2 was 87% at 1.23 V vs. RHE, which was 13% higher than that of the original sample, as shown in Fig. 11c.…”