期刊
ADVANCED MATERIALS
卷 34, 期 3, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202106807
关键词
hydrogen evolution; interfacial electric field; photocatalysis; porphyrin
类别
资金
- National Natural Science Foundation of China [21872077, 21621003]
- National Key Research and Development Project of China [2020YFA0710304]
The dual-porphyrin heterostructure achieves efficient photocatalytic hydrogen evolution with superior activity and efficient charge separation and transfer, while reducing carrier recombination. This is mainly attributed to the giant interfacial electric field formed between dual porphyrins, providing a fresh insight into improving photocatalytic performance through interfacial electric field construction.
A dual-porphyrin heterostructure is successfully constructed by coupling tetrakis (4-carboxyphenyl) zinc porphyrin (ZnTCPP) with tetrakis (4-hydroxyphenyl) porphyrin (THPP). The high photocatalytic H-2 evolution rate of 41.4 mmol h(-1) g(-1) is obtained for ZnTCPP/THPP under full spectrum, which is approximate to 5.1 and approximate to 17.0 times higher than that of pure ZnTCPP and THPP, respectively. The significantly enhanced activity is mainly attributed to the giant interfacial electric field formed between dual porphyrins, which greatly facilitates efficient charge separation and transfer. Meanwhile, similar conjugated structures of dual porphyrins also provide proper interface match and decrease interface defects, thus inhibiting the recombination of photoproduced carriers. By rationally combining the appropriate band structures and high-quality interfacial contact of dual porphyrins, this work provides a fresh insight into the interfacial electric field construction to improve the photocatalytic performance.
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