探索α-MnO2/碳纳米管改善碱性燃料电池阴极氧还原反应性能的潜力

Abid Ullah, Basharat Hussain, Muhammad Raheel Khan, Kamran Alam, Muhammad Humayun, Muhammad Arif
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摘要

在燃料电池技术领域,开发具有成本效益的催化剂对于碱性膜燃料电池(AMFC)的商业化至关重要。传统上,铂(Pt)一直被用作 AMFC 的催化剂,但其高昂的成本成为广泛应用的主要障碍。本研究采用水热合成技术,将二氧化锰(α-MnO2)与碳纳米管(CNT)结合,开发出一种新型催化剂材料。利用扫描电子显微镜(SEM)和 X 射线衍射(XRD)对合成的催化剂进行了表征,并通过线性扫描伏安法(LSV)和旋转圆盘电极(RDE)实验对其电催化活性进行了评估。结果表明,α-MnO2-CNT 复合材料在碱性环境中具有很强的耐久性,对氧还原反应(ORR)具有很高的电催化活性。LSV 测量显示,在 0.1M KOH 电解液中,相对于标准甘汞电极 (SCE) 的电流密度为 -4.1 mA/cm2,过电位为 -0.3V。此外,与商用 Pt/C 催化剂相比,α-MnO2-CNT 复合材料显示出较高的甲醇耐受性和长期稳定性。这项研究表明,使用 α-MnO2-CNT 作为铂的一种具有成本效益的替代品,有可能促进 AMFC 技术的商业化。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Exploring the Potential of α-MnO2/ Carbon Nanotubes for Improved Oxygen Reduction Reaction Performance at the Cathode of Alkaline Fuel Cells
In the field of fuel cell technology, the development of cost-effective catalysts is crucial for the commercialization of Alkaline Membrane Fuel Cells (AMFCs). Platinum (Pt) has traditionally been employed as the catalyst in AMFCs, but its high cost poses a major barrier to widespread adoption. In this study, a new catalyst material was developed by incorporating Manganese Dioxide (α-MnO2) into Carbon Nanotubes (CNTs) using hydrothermal synthesis techniques. The synthesized catalyst was characterized using Scanning Electron Microscopy (SEM) and X-ray diffraction (XRD), and its electrocatalytic activity was evaluated through Linear Sweep Voltammetry (LSV) and CV through Rotating Disc Electrode (RDE) experiments. The results showed that the α-MnO2-CNT composite displayed strong durability in the alkaline environment and high electrocatalytic activity for oxygen reduction reaction (ORR). The LSV measurements revealed a current density of -4.1 mA/cm2 and an overpotential of -0.3V relative to Standard Calomel Electrode (SCE) in a 0.1M KOH electrolyte. Additionally, the α-MnO2-CNT composite displayed high methanol tolerance and long-term stability compared to commercial Pt/C catalysts. This study demonstrates that the use of α-MnO2-CNT as a cost-effective alternative to Pt has the potential to facilitate the commercialization of AMFC technology.
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