| Autor: |
Shaoqing Song, Jiari He, Shujuan Jiang, Chuanzhi Sun, Jinhua Luo |
| Rok vydání: |
2020 |
| Předmět: |
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| Zdroj: |
Chemical Engineering Journal. 396:125365 |
| ISSN: |
1385-8947 |
| DOI: |
10.1016/j.cej.2020.125365 |
| Popis: |
Directional charge transfer across in-plane structure of g-C3N4 is still inefficient because of the uniform delocalization charge distribution around triangular caves of the π-conjugated tri-s-triazine polymer, which severely restricts its application in solar energy conversion into H2 fuel. Herein, an in-plane coupling electric field is introduced to boost charge directional transfer by coupling Li+ with sp2-hybridized N ligand at triangular cave of g-C3N4 (LiC3N4) for highly efficient H2 bubble evolution. The constructed LiC3N4 demonstrates much high H2-evolution efficiency with a large number of visible H2 bubbles, which presents absolute performance advantage and industrial potential in comparison with g-C3N4 supported numerous noble metals. Density functional theory and characterizations reveal an efficient charge directional transfer from the 2pz orbit of sp2-hybridized N ligand to Li atom across in-plane structure of LiC3N4 is achieved under the coupling electric field, resulting in an efficient H2 bubble evolution. This research strategy shows a scientific perspective to boost directional charge transfer for much effective solar energy conversion into H2 fuel by Li+ coupling effect, which will be bound to introduce the competition for lithium resources between photocatalytic solar energy conversion and lithium batteries. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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Full Text from ScienceDirect