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电沉积在电化学还原氮掺杂氧化石墨烯/碳陶瓷电极上的镍钴合金纳米颗粒:一种用于甲醇和乙醇氧化的低成本电催化剂。

NiCo alloy nanoparticles electrodeposited on an electrochemically reduced nitrogen-doped graphene oxide/carbon-ceramic electrode: a low cost electrocatalyst towards methanol and ethanol oxidation.

作者信息

Rahmani Kaveh, Habibi Biuck

机构信息

Electroanalytical Chemistry Laboratory, Department of Chemistry, Faculty of Sciences, Azarbaijan Shahid Madani University Tabriz 53714-161 Iran

出版信息

RSC Adv. 2019 Oct 23;9(58):34050-34064. doi: 10.1039/c9ra06290d. eCollection 2019 Oct 18.

DOI:10.1039/c9ra06290d
PMID:35528884
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9073643/
Abstract

In this work, nickel-cobalt alloy nanoparticles were electrodeposited on/in an electrochemically reduced nitrogen-doped graphene oxide (ErN-GO)/carbon-ceramic electrode (CCE) and the resulting nanocomposite (NiCo/ErN-GO/CCE) was evaluated as a low cost electrocatalyst for methanol and ethanol electrooxidation. Field-emission scanning electron microscopy coupled with energy dispersive X-ray spectroscopy, X-ray diffraction, and Fourier-transform infrared spectroscopy were used for the physical characterization of the electrocatalyst. To study the electrochemical behavior and electrocatalytic activity of the prepared electrocatalyst towards the oxidation of methanol and ethanol in alkaline media, cyclic voltammetry, chronoamperometry and electrochemical impedance spectroscopy were utilized. Electrochemical investigation of the introduced electrocatalysts (NiCo alloy and Ni nanoparticles alone electrodeposited on/in different substrates) indicated that NiCo/ErN-GO/CCE has highest activity and stability towards methanol ( = 88.04 mA cm) and ethanol ( = 64.23 mA cm) electrooxidation, which highlights its potential use as an anodic material in direct alcohol fuel cells.

摘要

在本工作中,将镍钴合金纳米颗粒电沉积在电化学还原的氮掺杂氧化石墨烯(ErN-GO)/碳陶瓷电极(CCE)上/内,并将所得的纳米复合材料(NiCo/ErN-GO/CCE)评估为用于甲醇和乙醇电氧化的低成本电催化剂。采用场发射扫描电子显微镜结合能量色散X射线光谱、X射线衍射和傅里叶变换红外光谱对该电催化剂进行物理表征。为了研究制备的电催化剂在碱性介质中对甲醇和乙醇氧化的电化学行为和电催化活性,采用了循环伏安法、计时电流法和电化学阻抗谱。对引入的电催化剂(单独电沉积在不同基底上/内的NiCo合金和Ni纳米颗粒)进行的电化学研究表明,NiCo/ErN-GO/CCE对甲醇( = 88.04 mA cm)和乙醇( = 64.23 mA cm)电氧化具有最高的活性和稳定性,这突出了其作为直接醇类燃料电池阳极材料的潜在用途。

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