Journal
CHEMISTRY OF MATERIALS
Volume 26, Issue 4, Pages 1727-1733Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cm500034p
Keywords
-
Funding
- Federal Ministry of Education and Research of Germany
- state of Mecklenburg-Western Pomerania within the project Light2-Hydrogen
Ask authors/readers for more resources
Photocatalytic hydrogen evolution rates and structural properties as well as charge separation, electron transfer, and stabilization have been analyzed in advanced sol-gel-derived carbon nitrides (SG-CN) pyrolyzed at different temperatures (350-600 degrees C) and in bulk polymeric carbon nitride reference samples (CN) by XRD, XPS, FTIR, UV-vis, Raman, and photoluminescence as well as by in situ EPR spectroscopy. SG-CN samples show about 20 times higher H-2 production rates than bulk CN. This is due to their porous structure, partial disorder, and high surface area which favor short travel distances and fast trapping of separated electrons on the surface where they are available for reaction with protons. In contrast, most of the excited electrons in bulk polymeric CN return quickly to the valence band upon undesired emission of light, which is responsible for their low catalytic activity.
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