Facet-dependent catalytic activity of platinum nanocrystals for triiodide reduction in dye-sensitized solar cells

Zhang, Bo, Wang, Dong, Hou, Yu, Yang, Shuang, Yang, Xiao Hua, Zhong, Ju Hua, Liu, Jian, Wang, Hai Feng, Hu, P., Zhao, Hui Jun and Yang, Hua Gui (2013) Facet-dependent catalytic activity of platinum nanocrystals for triiodide reduction in dye-sensitized solar cells. Scientific Reports, 3 7: . doi:10.1038/srep01836

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Author Zhang, Bo
Wang, Dong
Hou, Yu
Yang, Shuang
Yang, Xiao Hua
Zhong, Ju Hua
Liu, Jian
Wang, Hai Feng
Hu, P.
Zhao, Hui Jun
Yang, Hua Gui
Title Facet-dependent catalytic activity of platinum nanocrystals for triiodide reduction in dye-sensitized solar cells
Journal name Scientific Reports   Check publisher's open access policy
ISSN 2045-2322
Publication date 2013-05-01
Year available 2013
Sub-type Article (original research)
DOI 10.1038/srep01836
Open Access Status DOI
Volume 3
Issue 7
Total pages 7
Place of publication London, United Kingdom
Publisher Nature Publishing Group
Language eng
Abstract Platinum (Pt) nanocrystals have demonstrated to be an effective catalyst in many heterogeneous catalytic processes. However, pioneer facets with highest activity have been reported differently for various reaction systems. Although Pt has been the most important counter electrode material for dye-sensitized solar cells (DSCs), suitable atomic arrangement on the exposed crystal facet of Pt for triiodide reduction is still inexplicable. Using density functional theory, we have investigated the catalytic reaction processes of triiodide reduction over {100}, {111} and {411} facets, indicating that the activity follows the order of Pt(111) > Pt(411) > Pt(100). Further, Pt nanocrystals mainly bounded by {100}, {111} and {411} facets were synthesized and used as counter electrode materials for DSCs. The highest photovoltaic conversion efficiency of Pt(111) in DSCs confirms the predictions of the theoretical study. These findings have deepened the understanding of the mechanism of triiodide reduction at Pt surfaces and further screened the best facet for DSCs successfully.
Keyword Solar cells
Nanoparticles
Electrocatalysis
Electron transfer
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID DP150104365
Institutional Status UQ
Additional Notes Article number 1836.

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2014 Collection
Australian Institute for Bioengineering and Nanotechnology Publications
 
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