【摘要】 采用固相反应法制备纳米γ MnO2催化剂,通过热压制得三相气体扩散电极。用稳态电流 电位极化曲线研究了这种纳米γ MnO2催化剂制成的多孔三相气体扩散电极的电化学性能,催化剂加入量对氧电极性能的影响,同时催化剂经过过筛处理后性能有很大的提高。SEM分析表明:过筛处理后,催化剂颗粒分布均匀,对氧还原的催化活性明显提高。更多还原

【Abstract】 Nanophase γMnO2 powder was prepared by solid state redox reaction.Three phases gasdiffusion electrode was obtained by hotpressing. Electrochemical performance of the porous three phases gasdiffusion electrode made from this kind of nanophase γMnO2 powder was studied by currentpotential polarization curves. The influence of catalyst content on the performance of oxygen electrode was also studied.The activity of catalyst was improved by the process of sifting.SEM analysis showed that the catalyst particle size distribution became wellproportioned and the activity of oxygen reduction on the catalyst after the process of sifting was enhanced.更多还原