文献类型：期刊文献

英文题名：Highly Electrocatalytic Activity of RuO2 Nanocrystals for Triiodide Reduction in Dye-Sensitized Solar Cells

作者：Hou, Yu[1];Chen, Zu Peng[1];Wang, Dong[2,3];Zhang, Bo[1,4];Yang, Shuang[1];Wang, Hai Feng[2,3];Hu, P.[2,3,5];Zhao, Hui Jun[6];Yang, Hua Gui[1,6]

机构：[1]E China Univ Sci & Technol, Key Lab Ultrafine Mat, Minist Educ, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Ctr Computat Chem, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[3]E China Univ Sci & Technol, Res Inst Ind Catalysis, Shanghai 200237, Peoples R China;[4]E China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China;[5]Queens Univ Belfast, Sch Chem & Chem Engn, Belfast BT9 5AG, Antrim, North Ireland;[6]Griffith Univ, Ctr Clean Environm & Energy, Nathan, Qld 4222, Australia

年份：2014

卷号：10

期号：3

起止页码：484

外文期刊名：SMALL

收录：;EI(收录号：20140717311271);WOS:【SCI-EXPANDED(收录号:WOS:000331944300009)】；

基金：Y. Hou and Z. P. Chen contributed equally to this work. This work was financially supported by the National Natural Science Foundation of China (20973059, 91022023, 21076076, 21203061), Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning, Shanghai Municipal Natural Science Foundation (12ZR1407500), Major Basic Research Program of Science and Technology Commission of Shanghai Municipality (10JC1403200), Australian Research Council's Future Fellowships (FT120100913), and Shanghai Natural Science Fund for Youth Scholars (12ZR1442600). P. H. thanks the Chinese Government for the "Thousands Talents" program. H. F. W. acknowledges the National Supercomputer Center in Jinan for computing time.

语种：英文

外文关键词：counter electrodes; density functional calculations; nanocrystalline materials; ruthenium; solar cells

摘要：Dye-sensitized solar cells (DSCs) are promising alternatives to conventional silicon devices because of their simple fabrication procedure, low cost, and high efficiency. Platinum is generally used as a superior counter electrode (CE) material, but the disadvantages such as high cost and low abundance greatly restrict the large-scale application of DSCs. An efficient and sustainable way to overcome the limited supply of Pt is the development of high-efficiency Pt-free CE materials, which should possess both high electrical conductivity and superior electrocatalytic activity simultaneously. Herein, for the first time, a two-step strategy to synthesize ruthenium dioxide (RuO2) nanocrystals is reported, and it is shown that RuO2 catalysts exhibit promising electrocatalytic activity towards triiodide reduction, which results in comparable energy conversion efficiency to that of conventional Pt CEs. More importantly, by virtue of first-principles calculations, the catalytic mechanism of electrocatalysis for triiodide reduction on various CEs is investigated systematically and it is found that the electrochemical triiodide reduction reaction on RuO2 catalyst surfaces can be enhanced significantly, owing to the ideal combination of good electrocatalytic activity and high electrical conductivity.