Photocatalytic Hydrogen Evolution from Water Using Fluorene and Dibenzothiophene Sulfone-Conjugated Microporous and Linear Polymers
Photocatalytic Hydrogen Evolution from Water Using Fluorene and Dibenzothiophene Sulfone-Conjugated Microporous and Linear Polymers
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DOI：
10.1021/acs.chemmater.8b02833
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发表时间：
2019-01-22
影响因子：
8.6
通讯作者：
Cooper, Andrew I.
中科院分区：
文献类型：
--
作者：
Sprick, Reiner Sebastian;Bai, Yang;Cooper, Andrew I.
采用牺牲孔清除剂研究了三种系列共轭微孔聚合物（CMPs）作为水中制氢光催化剂。在所有情况下，二苯并[b，d]噻吩砜聚合物的性能都优于它们的芴类似物。多孔网络S-CMP3的析氢速率最高，分别为6076 μ mol h(-1) g(-1) （λ > 295 nm）和3106 μ mol h(-1) g(-1) (λ > 420 nm)，在420 nm处的外量子效率为13.2%。S-CMP3优于其线性结构类似物P35，而在其他情况下，无孔线性聚合物优于等效多孔网络。这表明，如果使用合适的不限制电荷输运的连接剂，并且材料可以被水润湿，如本文研究的吸附和准弹性中子散射，微孔隙可能有利于牺牲光催化析氢。
Three series of conjugated microporous polymers (CMPs) were studied as photocatalysts for hydrogen production from water using a sacrificial hole scavenger. In all cases, dibenzo[b,d]thiophene sulfone polymers outperformed their fluorene analogues. A porous network, S-CMP3, showed the highest hydrogen evolution rates of 6076 mu mol h(-1) g(-1) (lambda > 295 nm) and 3106 mu mol h(-1) g(-1) (lambda > 420 nm), with an external quantum efficiency of 13.2% at 420 nm. S-CMP3 outperforms its linear structural analogue, P35, whereas in other cases, nonporous linear polymers are superior to equivalent porous networks. This suggests that microporosity might be beneficial for sacrificial photocatalytic hydrogen evolution, if suitable linkers are used that do not limit charge transport and the material can be wetted by water as studied here sorption and quasi-elastic neutron scattering.