纳米线
电化学
催化作用
纳米复合材料
氧还原
氧还原反应
纳米颗粒
材料科学
纳米结构
氧气
化学工程
电子转移
无机化学
电催化剂
纳米技术
电极
化学
有机化学
光化学
物理化学
工程类
作者
Fangyi Cheng,Yi Su,Jing Liang,Zhanliang Tao,Jun Chen
摘要
This paper reports a systematical study on the electrochemical properties of MnO2-based nanostructures as low-cost catalysts for oxygen reduction reaction (ORR) in alkaline media. The results show that the catalytic activities of MnO2 depend strongly on the crystallographic structures, following an order of α- > β- > γ-MnO2. Meanwhile, morphology is another important influential factor to the electrochemical properties. Among various micro and nanostructures, α-MnO2 nanospheres and nanowires outperform the counterpart microparticles. Furthermore, a new nanocomposite catalyst by depositing Ni nanoparticles on α-MnO2 nanowires (denoted as MnO2-NWs@Ni-NPs) was prepared and characterized. The as-prepared MnO2-NWs@Ni-NPs nanocomposite exhibits an onset potential of 0.08 V, a specific current of 33.5 mA/mg, and an overall quasi 4-electron transfer involved in oxygen reduction reaction, indicating its potential application as the electrocatalyst of oxygen reduction reaction.
科研通智能强力驱动
Strongly Powered by AbleSci AI