Journal
MACROMOLECULAR CHEMISTRY AND PHYSICS
Volume 220, Issue 19, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/macp.201900304
Keywords
conjugated microporous polymers; photocatalytic hydrogen evolution; terminal groups
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Funding
- National Natural Science Foundation of China [21574087, 21404074]
- Science and Technology Department of Sichuan Province [2019YJ0128, 2019YFG0277]
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Conjugated microporous polymers (CMPs) have attracted more and more attention as active materials for photocatalytic water-splitting hydrogen evolution, however, the correlation between terminal group and hydrogen evolution performance of CMPs is rarely studied. Herein, three triazine-based CMPs (Ta-CMPs) with the same polymer backbone and different terminal groups (Ta-CMP, Ta-CMP-N, and Ta-CMP-CN) are synthesized via Suzuki-Miyaura coupling reaction using different end-capping agents. Although the Ta-CMPs show similar porous structure and comparable band gaps, Ta-CMP-CN with electron-withdrawing terminal group exhibits the highest hydrogen evolution rate (HER) of 698 mu mol g(-1) h(-1) under visible light, while Ta-CMP-N with electron-donating terminal group exhibits the lowest HER of 99 mu mol g(-1) h(-1). It is found that the addition of electron-withdrawing terminal group can facilitate photoinduced charge separation, thus improving photocatalytic HER performance of the CMPs.
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