Bioelectrochemistry ( IF 4.8 ) Pub Date : 2018-09-15 , DOI: 10.1016/j.bioelechem.2018.09.004 Mir Reza Majidi , Fatemeh Shahbazi Farahani , Mirghasem Hosseini , Iraj Ahadzadeh
In this work, low cost α-MnO2 nanowires and α-MnO2 nanowires supported on carbon Vulcan (α-MnO2/C) have been synthesized via a simple and facile hydrothermal method for application in microbial fuel cells. The prepared samples have been characterized by X-ray diffraction (XRD), Raman spectroscopy and field emission scanning electron microscopy (FE-SEM). Electrocatalytic activities of the samples have been evaluated by means of cyclic voltammetry (CV), linear sweep voltammetry (LSV) and electrochemical impedance spectroscopy (EIS) in a neutral phosphate buffer solution. EIS was performed at different potentials to gain further insight into the kinetic properties of α-MnO2/C. Both catalysts were used in air cathode microbial fuel cells to achieve power densities of 180 and 111 mWm−2 for α-MnO2/C and pristine α-MnO2 nanowires, respectively. α-MnO2/C functions as a good and economical alternative for Pt free catalysts in practical MFC applications, as shown by the findings of stability test and voltage generation cycles in long-term operation of MFC.
中文翻译:
低成本nanowiredα-MnO的2 / C作为在空气阴极微生物燃料电池的ORR催化剂
在这项工作中,成本低α-MnO的2个纳米线和α-MnO的2个负载在碳上的Vulcan(α-MnO的纳米线2 / C)已经通过在微生物燃料电池中的应用的简单且容易的水热法合成。制备的样品已通过X射线衍射(XRD),拉曼光谱和场发射扫描电子显微镜(FE-SEM)进行了表征。样品的电催化活性已通过中性磷酸盐缓冲溶液中的循环伏安法(CV),线性扫描伏安法(LSV)和电化学阻抗谱(EIS)进行了评估。EIS在不同的电位进行进一步深入了解的动力学性质α-MnO的2/C。两种催化剂在空气阴极微生物燃料电池中使用,以实现180和111的MWM功率密度-2为α-MnO的2 / C和原始α-MnO的2个纳米线,分别。在MFC的长期运行中,稳定性测试和电压产生周期的发现表明,α-MnO2/ C可以作为MFC实际应用中无铂催化剂的良好且经济的替代品。