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首页> 外文期刊>International Journal of Electrochemical Science >Oxygen Electroreduction on Multi-Walled Carbon Nanotube Supported Metal Phthalocyanines and Porphyrins in Acid Media
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Oxygen Electroreduction on Multi-Walled Carbon Nanotube Supported Metal Phthalocyanines and Porphyrins in Acid Media

机译：酸性介质中多壁碳纳米管负载的金属酞菁和卟啉的氧电还原

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摘要

Metal phthalocyanine and porphyrin functionalized multi-walled carbon nanotubes (MWCNTs) wereused as non-precious electrocatalysts for the electroreduction of oxygen. The catalyst materials wereheat-treated at different temperatures before electrochemical testing. X-ray photoelectron spectroscopicstudy was carried out in order to examine the surface composition. The oxygen reduction reaction(ORR) has been investigated on Fe phthalocyanine/MWCNT, Co phthalocyanine/MWCNT, Feporphyrin/MWCNT and Co porphyrin/MWCNT catalysts. Electrochemical experiments were carriedout in 0.5 M H2SO4 solution employing the rotating disk electrode (RDE) method. The RDEmeasurements showed increase of electrocatalytic activity for MN4 macrocycle/MWCNT modifiedelectrodes in acid media and catalytic activity increased with increase of pyrolysis temperature.Particularly high electrocatalytic activity for ORR was observed for electrodes heat-treated at 800 C.The RDE results obtained indicate the effect of different nitrogen groups introduced by pyrolysis onthe electrocatalytic activity.
机译：金属酞菁和卟啉官能化的多壁碳纳米管（MWCNT）被用作非贵重的电催化剂，用于氧的电还原。在电化学测试之前，将催化剂材料在不同温度下进行热处理。为了检查表面组成，进行了X射线光电子能谱研究。在Fe酞菁/ MWCNT，Co酞菁/ MWCNT，Fe卟啉/ MWCNT和Co卟啉/ MWCNT催化剂上研究了氧还原反应（ORR）。使用转盘电极（RDE）方法在0.5 M H2SO4溶液中进行电化学实验。 RDE测量表明，在酸性介质中，MN4大环/ MWCNT修饰电极的电催化活性增加，并且随着热解温度的升高，催化活性也增加。特别是在800°C热处理的电极上，ORR的电催化活性特别高。分解引入的不同氮基对电催化活性的影响

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