کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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5432555 | 1508833 | 2017 | 7 صفحه PDF | دانلود رایگان |
An efficient dual catalyst of molybdenum carbide nanoparticles embedded nitrogen-doped porous carbon nanofibers (Mo2C/NPCNFs) has been developed for hydrogen evolution reaction (HER) and oxygen reduction reaction (ORR). The well-aligned and nanoporous identity of the desirable hybrid Mo2C/NPCNFs by an electrospun approach provides the good conductivity and rich active sites addressing excellent HER catalytic performance with an onset potential of â85 mV, a Tafel slope of 68 mV decâ1, and an exchange current density of 0.178 mA cmâ2 in 0.5 M H2SO4. It is noting that the Mo2C/NPCNFs also shows remarkable ORR catalytic activity with an onset potential of â¼0.9 V, a half-potential of â¼0.77 V and a Tafel slope of 60.2 mV decâ1 at 1600 rpm in 0.1 M KOH. In addition, the experimental results demonstrate the core-shell 1D nanostructures boost the Mo2C/NPCNFs' stability of the durable catalytic activity over 10 h for both HER and ORR. This study designs a new structure for carbon-supported Mo2C composites, providing a distinctive course for the development of high-performance non-noble HER and ORR catalysts.
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Journal: Carbon - Volume 114, April 2017, Pages 628-634