【摘要】 采用固相反应法制备出纳米级γ MnO2超微粒子,并且结合透射电镜(TEM)、X射线衍射(XRD)等测试手段对微粒的形貌、粒径大小进行表征和讨论。研究了用这种纳米γ MnO2超微粒子制成的多孔三相气体扩散电极的氧还原电流 电位极化曲线。实验结果表明,纳米γ MnO2在中性溶液中,对氧还原具有很好的电催化活性。更多还原

【Abstract】 The nanophase γ-MnO2 ultramicro particle was prepared by solid-phase redox reaction. The morphology and particle size of the material was characterized and discussed by TEM and XRD. The curves of oxygen reduction current vs. potential polariz ation for the porous gas-diffusion electrode made from the nanophase γ-MnO2 ultramicro particle was researched. The experimental results show that the synthesized material has high electrocatalytical activity for oxygen reduction in the neutral solution.更多还原