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首页> 外文期刊>International Journal of Electrochemical Science >The Fabrication of Pt/Co Nanocomposite Supported on Reduced Graphene Oxide for Methanol Oxidation
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The Fabrication of Pt/Co Nanocomposite Supported on Reduced Graphene Oxide for Methanol Oxidation

机译：还原氧化石墨烯负载的Pt / Co纳米复合材料的甲醇氧化

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摘要

Cobalt modified Pt-based nanocatalysts supported on reduced graphene oxide (Pt-Co/RGO) wasfabricated by a magnetically enhanced inductively coupled plasma (ME-ICP). The analytical resultsindicated that the objective materials with appropriate particle size, uniform particle distribution, andsuperior crystal structure were synthesized. The catalytic activity of Pt-based catalyst for methanoloxidation was improved, attributing to the utilization of graphene supports and the metal cobalt. Theelectrochemically active surface area of Pt-Co/RGO and Pt utilization efficiency is calculated to be789 cm 2 ·mg -1 and 69.3%, which is about 6.4 times and 2.88 times higher than the 20 wt.% commercialPt/C catalyst respectively. The I f of Pt-Co/RGO is measured to be 410 mA·mg -1 , which is 4.1 timeshigher than Pt/RGO and 8 times higher than 20 wt.% Pt/C catalyst. The I f /I b ratios of Pt/C, Pt/RGO andPt-Co/RGO are 1.09, 1.10, and 1.13, respectively. The highest I f /I b ratio of Pt-Co/RGO demonstratesthat Pt-Co/RGO has a less carbonaceous accumulation and much more tolerance toward CO poisoning.
机译：通过磁性增强的电感耦合等离子体（ME-ICP）制备了负载在还原氧化石墨烯（Pt-Co / RGO）上的钴改性Pt基纳米催化剂。分析结果表明，所合成的目标材料具有适当的粒径，均匀的颗粒分布和优良的晶体结构。 Pt基催化剂对甲醇氧化的催化活性得到提高，这归因于石墨烯载体和金属钴的利用。 Pt-Co / RGO的电化学活性表面积和Pt利用率经计算为789 cm 2·mg -1和69.3％，分别比20％（重量）的商业Pt / C催化剂高约6.4倍和2.88倍。经测定，Pt-Co / RGO的I f为410 mA·mg -1，比Pt / RGO高4.1倍，比20 wt。％Pt / C催化剂高8倍。 Pt / C，Pt / RGO和Pt-Co / RGO的I f / I b比分别为1.09、1.10和1.13。 Pt-Co / RGO的最高If / Ib比表明，Pt-Co / RGO的碳积累较少，对CO中毒的耐受性更高。

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