کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
185156 459591 2014 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Investigation of carbon nanotubes decorated with cobalt sulfides of different phases as nanocomposite catalysts in dye-sensitized solar cells
ترجمه فارسی عنوان
بررسی نانولوله های کربنی تزئین شده با سولفید های کبالت از فاز های مختلف به عنوان کاتالیزورهای نانو کامپوزیت در سلول های خورشیدی حساسیت به رنگ
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی


• CNT@CoS1.097 and CNT@Co9S8 were prepared via annealing at different temperatures.
• CNT@Co9S8 showed the superior electrocatalytic activity to CNT@CoS1.097.
• The cell efficiency of the Pt-free DSC reached 7.78% using the CoS CNT@Co9S8 CE.

In this study, nanocomposites of cobalt sulfide and carbon nanotube (CNT) in the forms of CNT@CoS1.097 and CNT@Co9S8 were deposited on fluorine-doped SnO2 (FTO)-coated glasses by using a facile spray-coating approach, followed by annealing under N2 atmosphere at 400 and 600 °C, respectively; and employed as counter electrodes (CEs) for dye-sensitized solar cells (DSCs). According to the electrochemical properties of CEs quantified by cyclic voltammetry, electrochemical impedance spectroscopy, and Tafel polarization measurements, the CNT@Co9S8 CE showed a superior electrocatalytic activity towards triiodide (I3) reduction to that of the CNT@CoS1.097 CE. As a result, the DSC based on the CNT@Co9S8 CE achieved an impressive photovoltaic conversion efficiency of 7.78%, which was even higher than those of the DSCs assembled with the CNT@CoS1.097 CE (7.29%) and Pt CE (7.46%). This signifies that the CNT@Co9S8 was indeed an efficient and cost-effective Pt-like alternative CE for I3 reduction reaction in DSCs.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 143, 10 October 2014, Pages 216–221
نویسندگان
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