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石墨烯基RuO2納米復(fù)合材料作為高效的催化劑用于染料敏化太陽能電池中碘化物的還原 已有1人參與
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Graphene based RuO2 nanohybrid as a highly efficient catalyst for triiodide reduction in dye sensitized solar cells,CARBON 81 (2015) 710-719. 影響因子:6.16 摘要:This study is the first to report the synthesis of graphene based RuO2 nanohybrid materials and their application as a counter electrode (CE) in dye sensitized solar cells (DSCs). Ru nanoparticles (RuNPs) with an average size of 9 nm were uniformly immobilized on the surface of reduced graphene oxide (RGO) with the simultaneous co reduction of Ru precursor ions and graphene oxide (GO) to Ru atoms and RGO, respectively, through dry plasma reduction (DPR) under atmospheric pressure and at near room temperature without using any toxic chemicals. Since RuNPs are more susceptible to oxidation, Ru atoms located on the surface of RuNPs are further oxidized to RuO2 in atmosphere. The resulting RuO2 RGO nanohybrid with a very small amount of Ru exhibits low charge transfer resistance, low diffusion impedance and good long term stability. The application of RuO2 RGO nanohybrid as an alternative CE for DSCs leads to high energy conversion efficiency of 8.32 ± 0.15%, which is comparable to the value of 8.16 ± 0.13% of DSCs based on a Pt NP CE prepared by DPR. This study also discusses the influence of hydrogen species existing in either precursor ions or graphenes on the formation of uniform and well dispersed NPs on the substrates. 中文翻譯摘要:本研究首先報(bào)道了石墨烯基RuO2納米復(fù)合材料的合成和應(yīng)用作為染料敏化太陽能電池(DSC)的對(duì)電極(CE)。平均粒徑在9nm的Ru納米顆粒(RuNPs)均勻的涂覆在還原的氧化石墨烯表面(RGO),同時(shí)將Ru前驅(qū)體離子和氧化石墨烯還原成Ru原子和RGO,在常壓和室溫條件下通過干式等離子還原沒有用到任何有毒的化學(xué)品。因?yàn)镽uNPs容易氧化,位于RuNPs表面的Ru原子在空氣中進(jìn)一步氧化成RuO2。合成的RuO2-RGO納米復(fù)合材料具有非常少量的Ru,呈現(xiàn)出低的電荷轉(zhuǎn)移阻力、低擴(kuò)散阻抗和好的長期穩(wěn)定性。 RuO2-RGO納米復(fù)合材料作為DSCs中可選擇的CE的應(yīng)用導(dǎo)致高的能量轉(zhuǎn)換效率8.32±0.15%,比得上基于Pt-NP通過DPR制備的CE的DSCs8.16±0.13%。本研究也討論了存在于前驅(qū)體離子或是石墨烯中氫原子的種類對(duì)基板上均勻的、良好分散性的NPs的影響。 想獲得更多資源可點(diǎn)擊鏈接http://www.tjdrfk.com/news/dfrghnbvc.html 圖片4.jpg 圖片1.jpg 圖片2.jpg 圖片3.jpg |
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