Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 58, Issue 11, Pages 3433-3437Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201811938
Keywords
carbon dioxide reduction; grain boundaries; hydrogen production; photocatalysis; polymeric carbon nitride
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Funding
- Alexander von Humboldt Foundation
- Max Planck Society
- National Key R&D Program of China [2018YFA0209301]
- National Science Foundation of China [21425309, 21761132002]
- 111 project [D16008]
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Photocatalytic water splitting is a promising and clean way to mimic plant photosynthesis in a sustainable manner. Improvements of the quantum efficiency and optical absorption in the relevant range are necessary steps to approach practicality. Herein, we reported that these issues can be readily addressed when 5-aminotetrazole, a monomer with high nitrogen content, is used for the synthesis of carbon nitride. The molten salt mixture NaCl/KCl is used as a high-temperature solvent to tailor the grain boundary structure and chemistry. Visible light quantum efficiency for H-2 production of 0.65 could be obtained in the presence of K2HPO4 as a double layer modifier. This value is very high, considering that this number depends on light to charge couple conversion, charge localization, as well as a successful oxidation and reduction reaction.
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