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Phosphate ions improve the performance of BiFeO3 piezoelectric photoelectrochemical water splitting.
- Source :
- New Journal of Chemistry; 1/14/2024, Vol. 48 Issue 2, p866-873, 8p
- Publication Year :
- 2024
-
Abstract
- Enhancing the piezoelectric polarization strength of materials to promote the photogenerated carrier separation is of great significance for piezoelectric polarization-assisted photoelectrochemical (PEC) water splitting. In this paper, P-BiFeO<subscript>3</subscript> composite photoelectrodes were synthesized by modifying BiFeO<subscript>3</subscript> photoelectrodes with phosphate ions. The maximum photocurrent density of the P-BiFeO<subscript>3</subscript> composite photoelectrodes could reach 0.87 mA cm<superscript>−2</superscript> at 1.23 V vs RHE, which is significantly enhanced compared to the BiFeO<subscript>3</subscript> photocurrent. The enhanced photoelectrochemical activity of the phosphate ion-modified BiFeO<subscript>3</subscript> photoelectrodes may be attributed to the increased visible light absorption and larger active area due to the presence of phosphate groups. Furthermore, the photocurrent density of the P-BiFeO<subscript>3</subscript> composite photoelectrodes after the introduction of the piezoelectric polarisation field reached 2.58 mA cm<superscript>−2</superscript> at 1.23 V vs RHE, which was 2.2 times higher than that of BiFeO<subscript>3</subscript> (1.17 mA cm<superscript>−2</superscript>). The presence of phosphate groups on the surface of BiFeO<subscript>3</subscript> photoelectrodes can improve their asymmetry and increase their piezoelectric polarisation intensity, further enhancing the PEC water splitting performance of the material. This study provides a strategy for the design of highly active photoanodes with ionic modification to enhance the piezoelectric polarisation of the material to improve PEC water splitting. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 11440546
- Volume :
- 48
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- New Journal of Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 174564707
- Full Text :
- https://doi.org/10.1039/d3nj02733c