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High-performance BiVO4 photoanodes cocatalyzed with bilayer metal–organic frameworks for photoelectrochemical application.
- Source :
-
Journal of Colloid & Interface Science . Aug2022, Vol. 619, p257-266. 10p. - Publication Year :
- 2022
-
Abstract
- [Display omitted] In this work, we modified a BiVO 4 photoanode with bilayer Fe-MOF and Ni-MOF as cocatalysts for the first time and obtained a highly efficient BiVO 4 composite photoanode whose photocurrent density was increased by 2.7 times. The optimized BiVO 4 /Fe-MOF/Ni-MOF photoanode demonstrated a photocurrent density of 1.80 mA/cm2 at 1.23 V vs. a reversible hydrogen electrode (RHE). The onset potential of the BiVO 4 /Fe-MOF/Ni-MOF photoanode markedly decreased from 0.9 V to 0.69 V in comparison with the pure BiVO 4 photoanode. It is speculated that Fe-MOF and Ni-MOF led to more reactive oxygen evolution sites and that the bilayer cocatalysts synergistically promoted the separation of photogenerated electron-hole pairs, which may be the influencing factor for the photoelectrochemical performance of the BiVO 4 /Fe-MOF/Ni-MOF photoanode being distinctively enhanced. Thus, this work sheds some interesting new light on the construction of a high-efficiency photoanode for photoelectrochemical applications. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00219797
- Volume :
- 619
- Database :
- Academic Search Index
- Journal :
- Journal of Colloid & Interface Science
- Publication Type :
- Academic Journal
- Accession number :
- 156452247
- Full Text :
- https://doi.org/10.1016/j.jcis.2022.03.143