High-performance BiVO 4 photoanodes cocatalyzed with bilayer metal-organic frameworks for photoelectrochemical application

In this work, we modified a BiVO photoanode with bilayer Fe-MOF and Ni-MOF as cocatalysts for the first time and obtained a highly efficient BiVO composite photoanode whose photocurrent density was increased by 2.7 times. The optimized BiVO /Fe-MOF/Ni-MOF photoanode demonstrated a photocurrent densi...

Full description

Saved in:
Bibliographic Details
Published inJournal of colloid and interface science Vol. 619; p. 257
Main Authors Jiang, Liwen, Qin, Qin, Wang, Yuling, Su, Yaqian, Xia, Ligang, Lin, Shuanglong, Yao, Weifeng, Wu, Qiang, Min, Yulin, Xu, Qunjie
Format Journal Article
LanguageEnglish
Published United States 01.08.2022
Subjects
Metal–organic framework
Cocatalyst
Water decomposition
Photoelectrochemical
BiVO photoanode
Online AccessGet full text

Cover

More Information
Summary:In this work, we modified a BiVO photoanode with bilayer Fe-MOF and Ni-MOF as cocatalysts for the first time and obtained a highly efficient BiVO composite photoanode whose photocurrent density was increased by 2.7 times. The optimized BiVO /Fe-MOF/Ni-MOF photoanode demonstrated a photocurrent density of 1.80 mA/cm at 1.23 V vs. a reversible hydrogen electrode (RHE). The onset potential of the BiVO /Fe-MOF/Ni-MOF photoanode markedly decreased from 0.9 V to 0.69 V in comparison with the pure BiVO 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 /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.
ISSN:1095-7103