H2/O2 Alkaline Membrane Fuel Cell Performances Using Carbon-Supported Metal Phthalocyanine (MPc/C,M = Co, Cu, Zn, Ni) as Cathode Catalysts
Aiming at new cost-effective, high performance electrode material for supercapacitors, partial or complete replacement of precious metal has been under great effort by many research groups. Manganes oxide (MnO2) is generally considered to be the most promising transition metal oxide for the next-generation supercapacitors by virtue of its high energy density, low cost, environmental friendliness, and natural abundance. For obtaining the specified morphology with increased surface area and predetermined microstructure, the MnO2 has been proposed to be synthesized by various methods such as hydrothermal method and microwave method to realize the improved reaction kinetics. However, these methods are relatively complex, which inevitably adds the cost. In this work, use glucose reducing potassium ermanganate, the mesoporous MnO2 can be easily prepared at ambient conditions with high production rate. Thus a very simple, economic and green synthesis procedure is realized compared to other procedures reported in the literature. In addition, the as-prepared mesoporous MnO2 exhibits high-performance in electrochemical capacitors.