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Microwave-assisted synthesis of palladium nanoparticles intercalated nitrogen doped reduced graphene oxide and their electrocatalytic activity for direct-ethanol fuel cells
Journal of Colloid and Interface Science ( IF 9.9 ) Pub Date : 2018-01-08 , DOI: 10.1016/j.jcis.2018.01.028
Rajesh Kumar , Everson T.S.G. da Silva , Rajesh K. Singh , Raluca Savu , Andrei V. Alaferdov , Leandro C. Fonseca , Lory C. Carossi , Arvind Singh , Sarita Khandka , Kamal K. Kar , Oswaldo L. Alves , Lauro T. Kubota , Stanislav A. Moshkalev

Palladium nanoparticles decorated reduced graphene oxide (Pd-rGO) and palladium nanoparticles intercalated inside nitrogen doped reduced graphene oxide (Pd-NrGO) hybrids have been synthesized by applying a very simple, fast and economic route using microwave-assisted in-situ reduction and exfoliation method. The Pd-NrGO hybrids materials show good activity as catalyst for ethanol electro oxidation for direct ethanol fuel cells (DEFCs) as compared to Pd-rGO hybrids. The enhanced direct ethanol fuel cell can serve as alternative to fossil fuels because it is renewable and environmentally-friendly with a high energy conversion efficiency and low pollutant emission. As proof of concept, the electrocatalytic activity of Pd-NrGO hybrid material was accessed by cyclic voltammetry in presence of ethanol to evaluate its applicability in direct-ethanol fuel cells (DEFCs). The Pd-NrGO catalyst presented higher electro active surface area (∼6.3 m2 g−1) for ethanol electro-oxidation when compared to Pd-rGO hybrids (∼3.7 m2 g−1). Despite the smaller catalytic activity of Pd-NrGO, which was attributed to the lower exfoliation rate of this material in relation to the Pd-rGO, Pd-NrGO showed to be very promising and its catalytic activity can be further improved by tuning the synthesis parameters to increase the exfoliation rate.



中文翻译:

微波辅助钯纳米粒子插层氮掺杂还原氧化石墨烯的合成及其对直接乙醇燃料电池的电催化活性

通过应用微波辅助的原位还原和剥离技术,通过非常简单,快速且经济的途径,合成了装饰有钯的纳米颗粒和氧化还原的氧化石墨烯(Pd-rGO),以及嵌入氮掺杂的还原的氧化石墨烯(Pd-NrGO)杂化材料中的钯纳米颗粒。方法。与Pd-rGO杂种相比,Pd-NrGO杂种材料具有直接乙醇燃料电池(DEFC)的乙醇电催化催化剂的良好活性。增强型直接乙醇燃料电池可以替代化石燃料,因为它是可再生的且对环境友好的,具有高能量转换效率和低污染物排放。作为概念证明,在乙醇存在下,通过循环伏安法研究了Pd-NrGO杂化材料的电催化活性,以评价其在直接乙醇燃料电池(DEFCs)中的适用性。Pd-NrGO催化剂具有较高的电活性表面积(约6.3 m2 克-1)为乙醇电氧化时相比的Pd-RGO杂种(~3.7米2 克-1)。尽管Pd-NrGO的催化活性较小,这是由于该材料相对于Pd-rGO的剥落速率较低,但Pd-NrGO表现出很大的前景,并且可以通过调节合成参数来进一步提高其催化活性。增加去角质率。

更新日期:2018-01-08
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