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Graphite and platinum's catalytic selectivity for disulfide/thiolate (T-2/T-) and triiodide/iodide (I-3(-)/I-)
Wu, Hongwei; Lv, Zhibin; Chu, Zengze; Wang, Dan; Hou, Shaocong; Zou, Dechun
2011
Source PublicationJOURNAL OF MATERIALS CHEMISTRY
ISSN0959-9428
Volume21Issue:38Pages:14815-14820
AbstractDye-sensitized solar cells (DSSCs) using pure graphite sheet as the substrate and catalytic material were first fabricated based on a disulfide/thiolate (T-2/T-) redox couple. It can present up to 4.79% of the power-conversion efficiency (PCE), compared with the 2.33% of triiodide/iodide (I-3(-)/I-) redox couple at the same experimental condition under AM 1.5 illumination (100 mW cm(-2)). In contrast, when FTO/Pt is used as the counter electrode, PCE values are 3.97% and 7.13% based on the T-2/T- and I-3(-)/I- redox couples, respectively. With respect to the above dramatic difference, cyclic voltammetry (CV) and electrochemical impedance spectra (EIS) are applied to study the catalytic behavior at electrolyte (T-2/T- and I-3(-)/I-)/counter electrode (graphite sheet and FTO/Pt) interface. In particular, EIS indicated that the charge transfer resistance (R-CT) (1.1 Omega cm(2)) of the graphite sheet for T-2/T- is less than one-ninth of its R-CT (10.2 Omega cm(2)) for I-3(-)/I-. However, the R-CT of FTO/Pt (7.7 Omega cm(2)) for T-2/T- is more than twice the R-CT (3.0 Omega cm(2)) of I-3(-)/I-. This demonstrates the high catalytic selectivity of graphite and platinum (Pt) for the two redox couples. These results show the great potential of carbon materials to replace Pt by using this novel electron-transfer mediator in DSSCs.
DOI10.1039/c1jm11864a
Indexed BySCI
Language英语
WOS IDWOS:000295101000069
PublisherROYAL SOC CHEMISTRY
Citation statistics
Cited Times:39[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/72302
Collection中国科学院化学研究所
Corresponding AuthorZou, Dechun
AffiliationPeking Univ, Coll Chem & Mol Engn, Beijing Natl Lab Mol Sci, Key Lab Polymer Chem & Phys,Minist Educ, Beijing 100871, Peoples R China
Recommended Citation
GB/T 7714
Wu, Hongwei,Lv, Zhibin,Chu, Zengze,et al. Graphite and platinum's catalytic selectivity for disulfide/thiolate (T-2/T-) and triiodide/iodide (I-3(-)/I-)[J]. JOURNAL OF MATERIALS CHEMISTRY,2011,21(38):14815-14820.
APA Wu, Hongwei,Lv, Zhibin,Chu, Zengze,Wang, Dan,Hou, Shaocong,&Zou, Dechun.(2011).Graphite and platinum's catalytic selectivity for disulfide/thiolate (T-2/T-) and triiodide/iodide (I-3(-)/I-).JOURNAL OF MATERIALS CHEMISTRY,21(38),14815-14820.
MLA Wu, Hongwei,et al."Graphite and platinum's catalytic selectivity for disulfide/thiolate (T-2/T-) and triiodide/iodide (I-3(-)/I-)".JOURNAL OF MATERIALS CHEMISTRY 21.38(2011):14815-14820.
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