ICCAS OpenIR
Revealing important role of graphitic carbon nitride surface catalytic activity in photocatalytic hydrogen evolution by using different carbon cocatalysts
Si, Yanjie; Lv, Zaozao; Lu, Luhua; Liu, Muye; Wen, Yue; Chen, Ying; Jin, Hongyun; Liu, Jinghai; Song, Weiguo
2019-10-15
Source PublicationAPPLIED SURFACE SCIENCE
ISSN0169-4332
Volume491Pages:236-244
AbstractPrevious researches on photocatalytic hydrogen evolution (PHE) activity of graphitic carbon nitride (g-C3N4) mainly focus on its charge separation while the role of its surface catalytic activity is ignored. In this work, we focus on studying the role of surface catalytic activity in PHE of g-C3N4 by synthesising composites of g-C3N4 with different carbon nanoparticle (CP) co-catalysts. All three kinds of composites of in-situ formed N and P codoped CP (NPCP) in g-C3N4, g-C3N4 mixed with P doped CP (PCP), and g-C3N4 mixed with un-doped CP have been proved to have improved charge separation over pristine g-C3N4 via comparing their dye molecules degradation activity, photoluminance, photocurrent and ESR characters. However, g-C3N4/CP displays lower PHE activity than g-C3N4, while g-C3N4/NPCP and g-C3N4/PCP display higher PHE activity than g-C3N4. Electrochemical analysis reveals that the PHE activity of g-C3N4 based photocatalysts is limited by their surface catalytic activity: poor surface catalytic activity of g-C3N4 hinders residual charges that successfully migrate to the surface of g-C3N4 involving in hydrogen evolution reaction during PHE process.
DOI10.1016/j.apsusc.2019.06.122
Indexed BySCI
Language英语
WOS IDWOS:000479082900029
EI Accession Number1873-5584
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/82580
Collection中国科学院化学研究所
AffiliationChinese Acad Sci, Inst Chem, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Si, Yanjie,Lv, Zaozao,Lu, Luhua,et al. Revealing important role of graphitic carbon nitride surface catalytic activity in photocatalytic hydrogen evolution by using different carbon cocatalysts[J]. APPLIED SURFACE SCIENCE,2019,491:236-244.
APA Si, Yanjie.,Lv, Zaozao.,Lu, Luhua.,Liu, Muye.,Wen, Yue.,...&Song, Weiguo.(2019).Revealing important role of graphitic carbon nitride surface catalytic activity in photocatalytic hydrogen evolution by using different carbon cocatalysts.APPLIED SURFACE SCIENCE,491,236-244.
MLA Si, Yanjie,et al."Revealing important role of graphitic carbon nitride surface catalytic activity in photocatalytic hydrogen evolution by using different carbon cocatalysts".APPLIED SURFACE SCIENCE 491(2019):236-244.
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