A simple Y-type microfluidic fuel cell (MFC) was constructed with graphite plates as the electrodes.Unlike the formic acid/potassium permanganate MFCs previously reported, an alkaline sodiumformate solution (a fuel) and an acid potassium permanganate solution (KMnO 4 , an oxidant) wereadopted by our MFC. The flowing pattern in the main channel was a typical laminar flow. The effectsof three parameters such as the concentrations of KMnO 4 , the concentrations of H 2 SO 4 (a supportingcatholyte), and the flow rates of the reactants on the power output of the MFC were studied. Theexperimental results showed that the cell performance first improved but then decreased withincreasing each parameter. The optimum MFC exhibited a maximum power density of 4.51 mW cm -2and a limiting current density of 6.67 mA cm -2 with 50 mM KMnO 4 , 0.5 M H 2 SO 4 and a reactant flowrate of 30 mL h -1 . Although the power densities and limiting current densities of our MFC are not thehighest in the MFCs using KMnO 4 as oxidants, its open circuit voltage remains at the top. Our workdemonstrates that it is feasible to construct MFCs using alkaline formate and acidic permanganatesolutions, which diversifies the types of MFCs containing KMnO 4 as the oxidant.
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机译：用石墨板作为电极构造了一个简单的Y型微流体燃料电池（MFC），与之前报道的甲酸/高锰酸钾MFCs不同的是，碱性甲酸钠溶液（一种燃料）和一种酸性高锰酸钾溶液（KMnO 4，一种氧化剂被我们的MFC采用。主通道中的流动模式是典型的层流。研究了三个参数，如KMnO 4的浓度，H 2 SO 4（一种支持电解质）的浓度和反应物的流速对MFC功率输出的影响。实验结果表明，在提高每个参数的前提下，电池性能先提高后降低。最佳的MFC的最大功率密度为4.51 mW cm -2，极限电流密度为6.67 mA cm -2，其中50 mM KMnO 4，0.5 M H 2 SO 4和反应物流量为30 mL h -1。尽管我们的MFC的功率密度和极限电流密度在使用KMnO 4作为氧化剂的MFC中不是最高的，但其开路电压仍保持在最高位置。我们的工作表明使用碱性甲酸根和酸性高锰酸盐溶液构造MFC是可行的，这使包含KMnO 4作为氧化剂的MFC种类多样化。
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