Singh Susmita, Pal Prodipta, Roy Soumik, Basak Shalini, Saha Prantica, Dutta Anushna, Saha Sinthia, Bose Mainak
Department of Chemistry, Amity Institute of Applied Sciences, Amity University, Kolkata, India.
Turk J Chem. 2024 Oct 14;49(1):45-53. doi: 10.55730/1300-0527.3709. eCollection 2025.
Comprehensive studies of the ethanol oxidation reaction (EOR) have shown high interest in fuel cell technologies. As anode catalysts, introducing platinum group metal (PGM) free catalyst is promising for higher catalytic activity towards the EOR, as these are cost-effective, pollution-tolerant, and suitable for sustainable energy conversion. In this investigation, multi walled carbon nanotube (MWCNT) supported PGM-free electrocatalysts are synthesized by the impregnation reduction method. The atomic structure, composition, and morphology of nanoalloy catalysts are discovered through X-ray diffraction (XRD), Raman spectroscopy and fourier-transform infrared (FTIR) spectroscopy techniques. Electrochemical behaviours have been analysed by cyclic voltammetry (CV), linear sweep voltammetry (LSV), Chronoamperometry (CA), and electrochemical impedance spectroscopy (EIS), which reveal the oxidation kinetics of ethanol in an alkaline medium on the surface of the catalyst. The structure-activity relationship is a portrait of all the physical and electrochemical analyses that assists in exploring the active site of the surface, which facilitates electrooxidation activity. The C/FeCo catalyst exhibits higher catalytic efficiency and promotes CO removal through a bifunctional mechanism and electronic effect.
对乙醇氧化反应（EOR）的全面研究表明，其在燃料电池技术方面具有很高的研究价值。作为阳极催化剂，引入不含铂族金属（PGM）的催化剂有望对EOR具有更高的催化活性，因为这些催化剂具有成本效益、耐污染且适用于可持续能源转换。在本研究中，通过浸渍还原法合成了多壁碳纳米管（MWCNT）负载的不含PGM的电催化剂。通过X射线衍射（XRD）、拉曼光谱和傅里叶变换红外（FTIR）光谱技术揭示了纳米合金催化剂的原子结构、组成和形态。通过循环伏安法（CV）、线性扫描伏安法（LSV）、计时电流法（CA）和电化学阻抗谱（EIS）分析了电化学行为，这些方法揭示了碱性介质中乙醇在催化剂表面的氧化动力学。结构-活性关系是所有物理和电化学分析的总结，有助于探索表面的活性位点，从而促进电氧化活性。C/FeCo催化剂表现出更高的催化效率，并通过双功能机制和电子效应促进CO的去除。
