Effect of Acid-Washing on the Nature of Bulk Characteristics of Nitrogen-Doped Carbon Nanostructures as Oxygen Reduction Reaction Electrocatalysts in Acidic Media

被引：11
作者：
Mamtani, Kuldeep [1 ]
Singh, Deepika [1 ]
Dogu, Doruk [1 ]
Jain, Deeksha [1 ]
Millet, Jean-Marc M. [2 ]
Ozkan, Umit S. [1 ]
机构：
[1] Ohio State Univ, William G Lowrie Dept Chem & Biomol Engn, Columbus, OH 43210 USA
[2] Univ Claude Bernard Lyon 1, UMR 5256, IRCELYON Inst Rech Catalyse & Environm Lyon, 2 Av A Einstein, F-69626 Villeurbanne, France
来源：
ENERGY & FUELS | 2018年 / 32卷 / 10期
关键词：
ACTIVE-SITES; CATALYTIC-ACTIVITY; FE/N/C-CATALYSTS; REACTION ORR; FUEL-CELL; IRON; CNX; SPECTROSCOPY; STABILITY; NANOTUBES;
D O I：
10.1021/acs.energyfuels.8b01510
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
CNx catalysts were synthesized using Fe-doped MgO as a growth substrate. The oxygen reduction reaction (ORR) performance of the synthesized samples was evaluated in a half-cell. Acid-washing improved the ORR activity for the synthesized CNx samples. This is attributed to the removal of the exposed metal, which is likely to be blocking the active sites. Characterization experiments suggest that acid-washing totally eliminates the support material (MgO) and renders carbon more graphitic. This is likely to be due to elimination of amorphous or less crystalline species during washing. In addition, characterization experiments reveal significant differences in the metallic species that are exposed versus those encased in the carbon nanostructure.
引用
收藏
页码：11038 / 11045
页数：8
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