Unusual formation of tetragonal microstructures from nitrogen-doped carbon nanocapsules with cobalt nanocores as a bi-functional oxygen electrocatalyst

2017 ◽  
Vol 5 (5) ◽  
pp. 2271-2279 ◽  
Author(s):  
Enlai Hu ◽  
Jiqiang Ning ◽  
Bin He ◽  
Zhipeng Li ◽  
Changcheng Zheng ◽  
...  
Keyword(s):  
Metallic Cobalt ◽  
Nitrogen Doped ◽  
Carbon Nanocapsules ◽  
Nitrogen Doped Carbon ◽  
Cobalt Nanoparticle ◽  
Unusual Formation

A novel electrocatalyst based on nitrogen-doped carbon nanocapsules containing metallic cobalt nanoparticle (Co–N–C) tetragonal microstructures was firstly synthesized.

Cobalt nanoparticle-embedded nitrogen-doped carbon/carbon nanotube frameworks derived from a metal–organic framework for tri-functional ORR, OER and HER electrocatalysis

2019 ◽  
Vol 7 (8) ◽  
pp. 3664-3672 ◽  
Author(s):  
Hele Guo ◽  
Qichun Feng ◽  
Jixin Zhu ◽  
Jingsan Xu ◽  
Qianqian Li ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Carbon Nanotube ◽  
Metal Organic Framework ◽  
High Catalytic Activity ◽  
Nitrogen Doped ◽  
Metal Organic ◽  
Nitrogen Doped Carbon ◽  
Cobalt Nanoparticle ◽  
Organic Framework

A Co@N-CNTF electrocatalyst derived from a metal–organic framework exhibits high catalytic activity in the ORR, OER and HER.

scholarly journals Facile preparation of Co@Co3O4@Nitrogen doped carbon composite from ionic liquid as anode material for high performance lithium-ion batteries

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Mingjun Xiao ◽  
Yanshuang Meng ◽  
Chaoyu Duan ◽  
Fuliang Zhu ◽  
Yue Zhang
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Electrochemical Performance ◽  
Lithium Ion ◽  
Metallic Cobalt ◽  
Temperature Oxidation ◽  
Nitrogen Doped ◽  
Excellent Electrochemical Performance ◽  
Nitrogen Doped Carbon ◽  
Carbon Network

AbstractCo@Co3O4@Nitrogen doped carbon (Co@Co3O4@NDC) composite is synthesized by high temperature carbonization of ionic liquids followed by low temperature thermal oxidation. In the process of high temperature carbonization, cobalt ions are reduced to metallic cobalt, producing Co@Nitrogen doped carbon (Co@NDC). Co@Co3O4@NDC composite is obtained after low temperature oxidation, in which a part of the metallic cobalt is oxidized to Co3O4. The structural characterizations indicate that the composite is composed of three crystalline phases (carbon, Co and Co3O4). The results of transmission electron microscopy study show that the carbon materials not only coat the Co@Co3O4 nanoparticles, but also form carbon network that connects the Co@Co3O4 nanoparticles. This conductive carbon network is beneficial to improve the electrochemical performance of the composite. The electrochemical test results show that the Co@Co3O4@NDC composite exhibits excellent electrochemical performance, delivering the discharge capacities of 790 and 304 mAh·g−1 after 1500 cycles at 5 C and 10 C. This excellent electrochemical performance is due to synergistic effects of Co3O4, cobalt nanoparticles embedded in carbon which has high conductivity, and nitrogen functional groups.

Enhanced Oxygen Reduction Activities of Pt Supported on Nitrogen-Doped Carbon Nanocapsules

2014 ◽  
Vol 137 ◽  
pp. 41-48 ◽  
Author(s):  
Sangaraju Shanmugam ◽  
Jakkid Sanetuntikul ◽  
Toshiyuki Momma ◽  
Tetsuya Osaka
Keyword(s):  
Oxygen Reduction ◽  
Nitrogen Doped ◽  
Carbon Nanocapsules ◽  
Nitrogen Doped Carbon
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