期刊
ACS APPLIED MATERIALS & INTERFACES
卷 3, 期 7, 页码 2601-2606出版社
AMER CHEMICAL SOC
DOI: 10.1021/am200426q
关键词
oxygen reduction; nitrogen-doped carbon nanotubes; manganese oxide; fuel cell
资金
- NSFC [51002106, 21005055, 51025207]
- BSTWZ [G20100191]
- NSFZJ [R4090137, Y4100520]
- ZJED Innovative Team
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.
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