Ultra-small Fe2N nanocrystals embedded into mesoporous nitrogen-doped graphitic carbon spheres as a highly active, stable, and methanol-tolerant electrocatalyst for the oxygen reduction reaction

Nano Energy ◽  
2016 ◽  
Vol 24 ◽  
pp. 121-129 ◽  
Author(s):  
Junwu Xiao ◽  
Yangyang Xu ◽  
Yating Xia ◽  
Jiangbo Xi ◽  
Shuai Wang
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Graphitic Carbon ◽  
Carbon Spheres ◽  
Nitrogen Doped ◽  
Highly Active ◽  
Methanol Tolerant

A highly active and durable iron/cobalt alloy catalyst encapsulated in N-doped graphitic carbon nanotubes for oxygen reduction reaction by a nanofibrous dicyandiamide template

2018 ◽  
Vol 6 (14) ◽  
pp. 5962-5970 ◽  
Author(s):  
Li An ◽  
Ning Jiang ◽  
Biao Li ◽  
Shixin Hua ◽  
Yutong Fu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Graphitic Carbon ◽  
Cobalt Alloy ◽  
Iron Cobalt ◽  
Highly Active ◽  
Alloy Catalyst

The FeCo@N-GCNT-FD catalyst exhibits enhanced intrinsic activities and excellent durability for the oxygen reduction reaction.

scholarly journals Synthesis of amorphous and graphitized porous nitrogen-doped carbon spheres as oxygen reduction reaction catalysts

2020 ◽  
Vol 11 ◽  
pp. 1-15 ◽  
Author(s):  
Maximilian Wassner ◽  
Markus Eckardt ◽  
Andreas Reyer ◽  
Thomas Diemant ◽  
Michael S Elsaesser ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Nitrogen Content ◽  
Oxygen Reduction ◽  
Nitrogen Doping ◽  
Reduction Reaction ◽  
Model Systems ◽  
Carbon Sphere ◽  
Carbon Spheres ◽  
Nitrogen Doped ◽  
N Doping

Amorphous and graphitized nitrogen-doped (N-doped) carbon spheres are investigated as structurally well-defined model systems to gain a deeper understanding of the relationship between synthesis, structure, and their activity in the oxygen reduction reaction (ORR). N-doped carbon spheres were synthesized by hydrothermal treatment of a glucose solution yielding carbon spheres with sizes of 330 ± 50 nm, followed by nitrogen doping via heat treatment in ammonia atmosphere. The influence of a) varying the nitrogen doping temperature (550–1000 °C) and b) of a catalytic graphitization prior to nitrogen doping on the carbon sphere morphology, structure, elemental composition, N bonding configuration as well as porosity is investigated in detail. For the N-doped carbon spheres, the maximum nitrogen content was found at a doping temperature of 700 °C, with a decrease of the N content for higher temperatures. The overall nitrogen content of the graphitized N-doped carbon spheres is lower than that of the amorphous carbon spheres, however, also the microporosity decreases strongly with graphitization. Comparison with the electrocatalytic behavior in the ORR shows that in addition to the N-doping, the microporosity of the materials is critical for an efficient ORR.

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