J. Mater. Sci. Technol. ›› 2019, Vol. 35 ›› Issue (8): 1740-1746.DOI: 10.1016/j.jmst.2019.03.008
• Orginal Article • Previous Articles Next Articles
Linxing Meng, Wei Tian, Fangli Wu, Fengren Cao, Liang Li*()
Received:
2018-04-26
Revised:
2018-05-24
Accepted:
2018-05-25
Online:
2019-08-05
Published:
2019-06-19
Contact:
Li Liang
About author:
1The authors contributed equally to this work.
Linxing Meng, Wei Tian, Fangli Wu, Fengren Cao, Liang Li. TiO2 ALD decorated CuO/BiVO4 p-n heterojunction for improved photoelectrochemical water splitting[J]. J. Mater. Sci. Technol., 2019, 35(8): 1740-1746.
Fig. 4. (a) Absorption spectra of as-prepared samples, (b) J-V curves of BiVO4/CuO under simulated solar light (front and back illumination) and dark condition, (c) J-V curves of BiVO4, BiVO4/CuO and BiVO4/CuO/TiO2 under back illumination (solid line) and in dark (dashed line) and (d) corresponding ABPE curves.
Fig. 5. (a) J-V curves of BiVO4/CuO/TiO2 composites with different TiO2 thickness, (b) The current density at 1.23 V vs. RHE and the onset potential as a function of TiO2 thickness, (c) J-t curves of BiVO4, BiVO4/CuO, BiVO4/CuO/TiO2 at 1.23 V vs. RHE, (d) J-t curves of BiVO4/CuO/TiO2 composites (9 and 27 cycles of TiO2 thickness) at 1.23 V vs. RHE.
Fig. 7. Nyquist plots of BiVO4, BiVO4/CuO and BiVO4/CuO/TiO2 measured at an open-circuit voltage with the inserted equivalent circuit in the bottom-right corner to fit the EIS data.
RΩ (Ω) | Rct (kΩ) | |
---|---|---|
BiVO4 | 48.2 | 43.4 |
BiVO4/CuO | 48.0 | 10.9 |
BiVO4/CuO/TiO2 | 47.4 | 0.9 |
Table 1 Fitted series and charge transfer resistances from EIS data.
RΩ (Ω) | Rct (kΩ) | |
---|---|---|
BiVO4 | 48.2 | 43.4 |
BiVO4/CuO | 48.0 | 10.9 |
BiVO4/CuO/TiO2 | 47.4 | 0.9 |
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