气候变化领域集成服务门户(CCPortal): Linker-controlled polymeric photocatalyst for highly efficient hydrogen evolution from water

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DOI	10.1039/c7ee01109a
	Linker-controlled polymeric photocatalyst for highly efficient hydrogen evolution from water
	Wang Y.; Bayazit M.K.; Moniz S.J.A.; Ruan Q.; Lau C.C.; Martsinovich N.; Tang J.
发表日期	2017
ISSN	17545692
起始页码	1643
结束页码	1651
卷号	10 期号:7
英文摘要	Polymeric photocatalysts have been identified as promising materials for H2 production from water due to their comparative low cost and facile modification of the electronic structure. However, the majority only respond to a limited wavelength region (λ < 460 nm) and exhibit fast charge recombination. Our density-functional theory (DFT) calculations have identified an oxygen-doped polymeric carbon nitride structure with heptazine chains linked both by oxygen atoms and by nitrogen species, which results in a reduced band gap and efficient charge separation. A novel synthetic method has then been developed to control both surface hydrophilicity and more importantly, the linker species in a polymer, which highly influences the band gap and charge separation. As such, the synthesized polymer can be excited from UV via visible to even near-IR (λ = 800 nm) wavelengths, resulting in a 25 times higher H2 evolution rate (HER) than the previous benchmark polymeric g-C3N4 (λ > 420 nm), with an apparent quantum yield (AQY) of 10.3% at 420 nm and 2.1% at 500 nm, measured under ambient conditions, which is closer to the real environment (instead of vacuum conditions). The strategy used here thus paves a new avenue to dramatically tune both the light absorption and charge separation to increase the activity of polymeric photocatalysts. © The Royal Society of Chemistry 2017.
英文关键词	Carbon; Density functional theory; Electronic structure; Energy gap; Hydrogen production; Hydrophilicity; Photocatalysts; Separation; Ambient conditions; Charge separations; Facile modifications; Hydrogen evolution; Nitride structures; Surface hydrophilicity; Synthesized polymers; Wavelength regions; Polymers; catalyst; efficiency measurement; hydrogen; inorganic compound; nitrogen; numerical method; oxygen; photochemistry; physicochemical property; polymer
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190448
作者单位	Department of Chemical Engineering, UCL, Torrington Place, London, WC1E 7JE, United Kingdom; Department of Chemistry, University of Sheffield, Sheffield, S3 7HF, United Kingdom
推荐引用方式 GB/T 7714	Wang Y.,Bayazit M.K.,Moniz S.J.A.,et al. Linker-controlled polymeric photocatalyst for highly efficient hydrogen evolution from water[J],2017,10(7).
APA	Wang Y..,Bayazit M.K..,Moniz S.J.A..,Ruan Q..,Lau C.C..,...&Tang J..(2017).Linker-controlled polymeric photocatalyst for highly efficient hydrogen evolution from water.Energy & Environmental Science,10(7).
MLA	Wang Y.,et al."Linker-controlled polymeric photocatalyst for highly efficient hydrogen evolution from water".Energy & Environmental Science 10.7(2017).