Enhanced Catalytic Activity of Pt-NdFeO3 Nanoparticles Supported on Polyaniline-Chitosan Composite Towards Methanol Electro-Oxidation Reaction

IF 1.4 Q4 NANOSCIENCE & NANOTECHNOLOGY Journal of Nanostructures Pub Date : 2020-04-01 DOI:10.22052/JNS.2020.02.005

Somaye Khammarnia, A. Akbari, M. Ekrami-Kakhki, J. Saffari

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引用次数: 7

Abstract

In this work, NdFeO3 nanoparticles were synthesized through a simple co-precipitation method. The formation of NdFeO3 particles was verified by X-ray powder diffraction, infrared spectroscopy, vibrating sample magnetometer, and transmission electron microscopy analysis. Polyaniline and chitosan were employed as proper support for production of metal nanoparticles. Novel Pt-NFO/PA-CH nanocomposite was fabricated by immobilization of Pt nanoparticles on the PA-CH support in the presence of NdFeO3 nanoparticles. The prepared nanocomposite was characterized by transmission electron microscopy and X-ray powder diffraction analysis. The catalytic performance of the Pt-NFO/PA-CH nanocomposite was evaluated for electro-oxidation of methanol through CO stripping voltammetry, cyclic voltammetry, chronoamperometry, and electrochemical impedance spectroscopy. Durability of the Pt-NFO/PA-CH catalyst was investigated and the effects of several factors such as temperature, scan rate, and methanol concentration were studied for methanol oxidation. Enhanced catalytic performance of Pt-NFO/PA-CH nanocatalyst compared to Pt/PA-CH catalyst recommends its application for methanol electro-oxidation in direct methanol fuel cells.

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聚苯胺-壳聚糖复合材料负载Pt-NdFeO3纳米粒子对甲醇电氧化反应的催化活性增强

本文采用一种简单的共沉淀法合成了纳米NdFeO3。通过x射线粉末衍射、红外光谱、振动样品磁强计和透射电镜分析证实了NdFeO3颗粒的形成。以聚苯胺和壳聚糖为载体制备金属纳米颗粒。在NdFeO3纳米颗粒的存在下，将Pt纳米颗粒固定在PA-CH载体上，制备了新型Pt- nfo /PA-CH纳米复合材料。通过透射电子显微镜和x射线粉末衍射分析对所制备的纳米复合材料进行了表征。采用CO溶出伏安法、循环伏安法、计时伏安法和电化学阻抗法评价了Pt-NFO/PA-CH纳米复合材料对甲醇电氧化的催化性能。考察了Pt-NFO/PA-CH催化剂的耐久性，并研究了温度、扫描速率、甲醇浓度等因素对甲醇氧化的影响。与Pt/PA-CH催化剂相比，Pt- nfo /PA-CH纳米催化剂的催化性能有所提高，推荐其在直接甲醇燃料电池中用于甲醇电氧化。

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来源期刊

Journal of Nanostructures NANOSCIENCE & NANOTECHNOLOGY-

CiteScore

2.60

自引率

0.00%

发文量

审稿时长

7 weeks

期刊介绍： Journal of Nanostructures is a medium for global academics to exchange and disseminate their knowledge as well as the latest discoveries and advances in the science and engineering of nanostructured materials. Topics covered in the journal include, but are not limited to the following: Nanosystems for solar cell, energy, catalytic and environmental applications Quantum dots, nanocrystalline materials, nanoparticles, nanocomposites Characterization of nanostructures and size dependent properties Fullerenes, carbon nanotubes and graphene Self-assembly and molecular organization Super hydrophobic surface and material Synthesis of nanostructured materials Nanobiotechnology and nanomedicine Functionalization of nanostructures Nanomagnetics Nanosensors.