Journal
ACS APPLIED ENERGY MATERIALS
Volume 2, Issue 10, Pages 7457-7466Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.9b01450
Keywords
Tungsten trioxide; boron nitride quantum dots; hole extracting agent; charge separation; photoelectrochemical water oxidation
Funding
- Department of Science and Technology, India [SERB/EMR/2016/005123]
Ask authors/readers for more resources
Photoelectrochemical (PEC) water splitting is one of the most desirable techniques to harvest clean chemical energy from abundant solar energy. However, the anodic half reaction, i.e., water oxidation, is complicated due to the involvement of multiple electrons in this process. Herein, stable WO3 nanoblocks with the monoclinic phase have been modified by the incorporation of hexagonal boron nitride quantum dots (h-BNQDs) to improve the photogenerated electron-hole separation and additionally to hinder the charge recombination process. The photocurrent density (J) value for the modified WO3 photoanode by incorporation of BNQDs has been found to be 1.63 mA/cm(2) at the potential of 1.23 V-RHE, which is approximately 2.4-fold higher than the bare WO3 photoanode. The enhancement in photocurrent density is mainly due to the hole extraction property of BNQDs on the surface of the WO3 nanoblocks. A 2-fold increment in photogenerated charge carrier density (N-D) value has been achieved due to better charge separation of electron-hole pairs in the modified system, confirmed by the Mott-Schottky (MS) plot. The present work demonstrates a unique, low-cost strategy for enhancement of PEC water oxidation by modification of the photoanode with hole extracting agents.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available