Graphite and platinum&apos;s catalytic selectivity for disulfide/thiolate   (T-2/T-) and triiodide/iodide (I-3(-)/I-)

doi:10.1039/c1jm11864a

CORC > 北京大学 > 化学与分子工程学院

	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
刊名	材料化学杂志
	2011
关键词	SENSITIZED SOLAR-CELLS CARBON COUNTER ELECTRODE LOW-COST EFFICIENT PERFORMANCE RECOMBINATION
DOI	10.1039/c1jm11864a
英文摘要	Dye-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.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000295101000069&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Chemistry, Physical; Materials Science, Multidisciplinary; SCI(E); EI; 36; ARTICLE; 38; 14815-14820; 21
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/313195]
专题	化学与分子工程学院
推荐引用方式 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]. 材料化学杂志,2011.
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-).材料化学杂志.
MLA	Wu, Hongwei,et al."Graphite and platinum's catalytic selectivity for disulfide/thiolate (T-2/T-) and triiodide/iodide (I-3(-)/I-)".材料化学杂志 (2011).