Nanomaterials and Chemistry Key Laboratory, Wenzhou University, Wenzhou 325027, China.
ACS Appl Mater Interfaces. 2011 Jul;3(7):2601-6. doi: 10.1021/am200426q. Epub 2011 Jul 7.
MnOx-doped carbon nanotube (MnOx-CNTs) catalysts for the oxygen reduction reaction (ORR) were fabricated using a simple electrochemical deposition method. MnOx-CNTs (0.85 wt % MnOx) could exhibit an improved electrocatalytic activity, long-term stability and excellent resistance to crossover-effect compared to Pt/C catalysts. High-resolution transmission electron microscopy (HRTEM) and X-ray diffraction analysis confirm that the MnOx in the MnOx-CNTs exists in an amorphous state. Moreover, compared to the catalytic performances of MnOx on other substrates, the MnOx-CNTs exhibit a high ORR activity. X-ray photoelectron spectroscopy results suggest that the electron transfer, from the CNTs to the Mn ions occurs and the high positive charge is generated on the MnOx-CNT surface. This is believed to be origin of the catalytic activity observed in the ORR using MnOx-CNTs.
采用简单的电化学沉积法制备了 MnOx 掺杂碳纳米管（MnOx-CNTs）催化剂用于氧还原反应（ORR）。与 Pt/C 催化剂相比，MnOx-CNTs（0.85wt%MnOx）表现出改进的电催化活性、长期稳定性和对交叉效应的优异抗性。高分辨率透射电子显微镜（HRTEM）和 X 射线衍射分析证实，MnOx-CNTs 中的 MnOx 处于非晶态。此外，与 MnOx 在其他基底上的催化性能相比，MnOx-CNTs 表现出高的 ORR 活性。X 射线光电子能谱结果表明，电子从 CNTs 转移到 Mn 离子上，并且在 MnOx-CNT 表面上产生高正电荷。这被认为是使用 MnOx-CNTs 观察到的 ORR 催化活性的起源。
