文献类型：期刊文献

英文题名：A sulfur-assisted strategy to decorate MWCNTs with highly dispersed Pt nanoparticles for counter electrode in dye-sensitized solar cells

作者：Guo, Jian Wei[1];Zhang, Bo[1,2];Hou, Yu[1];Yang, Shuang[1];Yang, Xiao Hua[1];Yang, Hua Gui[1]

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Minist Educ, Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China

年份：2013

卷号：1

期号：6

起止页码：1982

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY A

收录：;EI(收录号：20131816289661);WOS:【SCI-EXPANDED(收录号:WOS:000314642700008)】；

基金：This work was financially supported by Scientific Research Foundation of East China University of Science and Technology (YD0142125), Pujiang Talents Programme and Major Basic Research Programme of Science and Technology Commission of Shanghai Municipality (09PJ1402800, 10JC1403200), Shuguang Talents Programme of Education Commission of Shanghai Municipality (09SG27), National Natural Science Foundation of China (20973059, 91022023, 21076076), Fundamental Research Funds for the Central Universities (WJ0913001), Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning and Program for New Century Excellent Talents in University (NCET-09-0347).

语种：英文

外文关键词：Cyclic voltammetry - Energy dispersive spectroscopy - High resolution transmission electron microscopy - Multiwalled carbon nanotubes (MWCN) - Platinum - Yarn - Electrodes - Catalyst activity - Scanning electron microscopy - Dispersions - Metal nanoparticles - Sulfur

摘要：A novel strategy was introduced to prepare hybrid nanomaterials of platinum nanoparticles and multi-walled carbon nanotubes (Pt-MWCNTs). A thin layer of sulfur on MWCNTs could absorb and bind the Pt precursors from solution on the MWCNTs' surface and also restrict their particle growth during reduction which resulted in ultrafine dispersions of metal nanocrystallites due to the strong affinity of sulfur for noble metals. The composite material was applied as the counter electrode (Pt-MWCNTs CE) for dye-sensitized solar cells (DSCs) and the fill factor (FF) and power-conversion efficiency (eta) of the DSC with Pt-MWCNTs CE were 0.63 and 7.69%, respectively. The corresponding values of the DSC with bare Pt CE were 0.55 and 6.31%. The morphology and elemental composition of Pt-MWCNTs were characterized by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The dispersion and attachment of Pt nanoparticles on the surface of MWCNTs were observed by transmission electron microscopy (TEM). Electrochemical impedance spectra (EIS), Tafel polarization measurement and cyclic voltammetry (CV) were performed to characterize the catalytic activities of this hybrid CE.