Journal
RSC ADVANCES
Volume 7, Issue 49, Pages 30650-30656Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ra04647b
Keywords
-
Categories
Funding
- National Basic Research Program of China (973 Program) [2015CB932200, 2014CB239303, 2013CB632404]
- Natural Science Foundation of Jiangsu Province of China [15KJB150010, BK20150955]
- Synergetic Innovation Center for Organic Electronics and Information Displays
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Newton Research Collaboration Programme Type 2 Award [NRCP/1415/264]
Ask authors/readers for more resources
Ta3N5 is a promising photoanode material for solar water splitting due to its suitable band gap and high theoretical solar energy conversion. A high onset potential of Ta3N5 limits its photoelectrochemical performance due to serious surface charge recombination. In a previous study, a TiO2 passivation layer was usually coated on the surface of Ta3N5 to reduce the surface recombination and improve the performance of a sample. However, to date, there are no studies on the effect of conductivity of the TiO2 passivation layer on the photoelectrochemical properties of a Ta3N5 photoanode. In this work, for the first time, the conductivity of TiO2 is increased by post-heating of a TiO2 passivation layer, leading to a 90 mV cathodic shift of the photo-potential of Ta3N5. After further loading with a Ni(OH)(x)/FeOOH bilayer electrocatalyst, the Ta3N5 photoanode achieves a current density of 6.4 mA cm(-2) at 1.23 VRHE and a HC-STH (half-cell solar to hydrogen efficiency) of 0.72% under a sunlight simulator (100 mW cm(-2)), which are the highest values among the Ta3N5 photoanodes prepared by thermal oxidation and nitridation of Ta foil.
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