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Synthesis and Application of Zirconium Metal–Organic Framework in Microbial Fuel Cells as a Cost-Effective Oxygen Reduction Catalyst with Competitive Performance
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2020-04-03 00:00:00 , DOI: 10.1021/acsaem.0c00054 Indrasis Das 1 , Md. T. Noori 2 , Melad Shaikh 1, 3 , Makarand M. Ghangrekar 1 , Rajakumar Ananthakrishnan 3
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2020-04-03 00:00:00 , DOI: 10.1021/acsaem.0c00054 Indrasis Das 1 , Md. T. Noori 2 , Melad Shaikh 1, 3 , Makarand M. Ghangrekar 1 , Rajakumar Ananthakrishnan 3
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Porous catalysts with a higher activated surface area are strategic materials to enhance the oxygen reduction reaction (ORR) and improve the performance of the microbial fuel cells (MFCs). In this investigation, a highly porous cagelike zirconium metal–organic framework (Zr-MOF) was synthesized by the solvothermal method and used as the ORR catalyst in an air-cathode MFC. Raman spectroscopy, X-ray diffraction, scanning electron microscopy, and energy-dispersive X-ray spectroscopy revealed the successful synthesis of Zr-MOF having a high specific surface area of 858 m2/g. Cyclic voltammetry analysis demonstrated a sharp ORR peak current at −0.38 V having a current value of 11 mA compared to the negligible amount of peak current observed for cathode having no catalyst. The MFC having Zr-MOF-catalyzed cathode could translate a power density of 131.2 ± 3.5 mW/m2 at a coulombic efficiency of 29.04 ± 1.54% from the organic matter present in wastewater; these values were comparable with the MFC having 10% Pt/C on cathode (128.7 ± 4.9 mW/m2 and 29.03 ± 2.76%, respectively). The cost of energy production by the Zr-MOF cathode was estimated to be ca. 4.4 times lower than that by the 10% Pt/C cathode. The performance of MFC indicates that Zr-MOF could be an excellent alternative cathode catalyst, to the costly Pt/C, upon ambitious scale-up of MFCs.
中文翻译：
锆金属-有机骨架的合成及在微生物燃料电池中作为具有竞争力的低成本降氧催化剂的应用
具有较高活化表面积的多孔催化剂是增强氧还原反应（ORR）和改善微生物燃料电池（MFCs）性能的关键材料。在这项研究中，通过溶剂热法合成了高度多孔的笼状锆金属-有机骨架（Zr-MOF），并用作空气阴极MFC中的ORR催化剂。拉曼光谱，X射线衍射，扫描电子显微镜和能量色散X射线光谱显示，成功合成了比表面积为858 m 2的Zr-MOF。/G。循环伏安法分析表明，与没有催化剂的阴极观察到的可忽略不计的峰值电流量相比，在-0.38 V处具有11 mA电流值的尖锐ORR峰值电流。具有Zr-MOF催化阴极的MFC可从废水中存在的有机物以29.04±1.54％的库仑效率转换131.2±3.5 mW / m 2的功率密度；这些值与在阴极上具有10％Pt / C的MFC相当（分别为128.7±4.9 mW / m 2和29.03±2.76％）。通过Zr-MOF阴极生产能源的成本估计约为。比10％Pt / C阴极低4.4倍。MFC的性能表明，随着MFC规模的扩大，Zr-MOF可以成为昂贵的Pt / C的极佳替代阴极催化剂。
更新日期：2020-04-03
中文翻译：
锆金属-有机骨架的合成及在微生物燃料电池中作为具有竞争力的低成本降氧催化剂的应用
具有较高活化表面积的多孔催化剂是增强氧还原反应（ORR）和改善微生物燃料电池（MFCs）性能的关键材料。在这项研究中，通过溶剂热法合成了高度多孔的笼状锆金属-有机骨架（Zr-MOF），并用作空气阴极MFC中的ORR催化剂。拉曼光谱，X射线衍射，扫描电子显微镜和能量色散X射线光谱显示，成功合成了比表面积为858 m 2的Zr-MOF。/G。循环伏安法分析表明，与没有催化剂的阴极观察到的可忽略不计的峰值电流量相比，在-0.38 V处具有11 mA电流值的尖锐ORR峰值电流。具有Zr-MOF催化阴极的MFC可从废水中存在的有机物以29.04±1.54％的库仑效率转换131.2±3.5 mW / m 2的功率密度；这些值与在阴极上具有10％Pt / C的MFC相当（分别为128.7±4.9 mW / m 2和29.03±2.76％）。通过Zr-MOF阴极生产能源的成本估计约为。比10％Pt / C阴极低4.4倍。MFC的性能表明，随着MFC规模的扩大，Zr-MOF可以成为昂贵的Pt / C的极佳替代阴极催化剂。
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