Sphere‐and‐Flake‐Structured Cu, N Co‐Doped Carbon Catalyst Designed by a Template‐Free Method for Robust Oxygen Reduction Reaction

2019 ◽  
Vol 6 (4) ◽  
pp. 1078-1087 ◽  
Author(s):  
Xinxin Xiang ◽  
Xiaoqin Li ◽  
Zhihan Huang ◽  
Taotao Gao ◽  
Hongyan Yuan ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Carbon Catalyst ◽  
Template Free ◽  
Co Doped

A N,P-co-doped 3D graphene/cobalt-embedded electrocatalyst for the oxygen reduction reaction

2017 ◽  
Vol 41 (24) ◽  
pp. 15236-15243 ◽  
Author(s):  
Xiao-Li Hu ◽  
Xu-Hong Dai ◽  
Xing-Quan He
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Low Cost ◽  
Reduction Reaction ◽  
Carbon Catalyst ◽  
Oxygen Reduction Reaction Activity ◽  
3D Graphene ◽  
Highly Efficient ◽  
Activity Catalyst ◽  
Co Doped

A 3D cobalt-embedded N,P-doped carbon catalyst was synthesized as a low-cost, stable and highly efficient oxygen reduction reaction activity catalyst.

Nitrogen and boron co-doped hollow carbon catalyst for the oxygen reduction reaction

Carbon ◽  
2016 ◽  
Vol 105 ◽  
pp. 1-7 ◽  
Author(s):  
Ji-Sun Han ◽  
Dong Young Chung ◽  
Dae-Gwon Ha ◽  
Jin-Hong Kim ◽  
Keunsu Choi ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Carbon Catalyst ◽  
Hollow Carbon ◽  
Co Doped

N and S Co-doped Ordered Mesoporous Carbon: An Efficient Electrocatalyst for Oxygen Reduction Reaction in Microbial Fuel Cells

2020 ◽  
Vol 16 (4) ◽  
pp. 625-638
Author(s):  
Leila Samiee ◽  
Sedigheh Sadegh Hassani
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Microbial Fuel Cells ◽  
Carbon Materials ◽  
Reduction Reaction ◽  
Carbon Substrate ◽  
Promising Candidate ◽  
X Ray ◽  
Carbon Framework ◽  
Co Doped

Background: Porous carbon materials are promising candidate supports for various applications. In a number of these applications, doping of the carbon framework with heteroatoms provides a facile route to readily tune the carbon properties. The oxygen reduction reaction (ORR), where the reaction can be catalyzed without precious metals is one of the common applications for the heteroatom-doped carbons. Therefore, heteroatom doped catalysts might have a promising potential as a cathode in Microbial fuel cells (MFCs). MFCs have a good potential to produce electricity from biological oxidization of wastes at the anode and chemical reduction at the cathode. To the best of our knowledge, no studies have been yet reported on utilizing Sulfur trioxide pyridine (STP) and CMK-3 for the preparation of (N and S) doped ordered porous carbon materials. The presence of highly ordered mesostructured and the synergistic effect of N and S atoms with specific structures enhance the oxygen adsorption due to improving the electrocatalytic activity. So the optimal catalyst, with significant stability and excellent tolerance of methanol crossover can be a promising candidate for even other storage and conversion devices. Methods: The physico-chemical properties of the prepared samples were determined by Small Angle X-ray Diffraction (SAXRD), N2 sorption-desorption, Transmission Electron Microscopy (TEM), Field Emission Scanning Electron Microscopy (FESEM) and X-ray Photoelectron Spectroscopy (XPS). The prepared samples were further applied for oxygen reduction reaction (ORR) and the optimal cathode was tested with the Microbial Fuel Cell (MFC) system. Furthermore, according to structural analysis, The HRTEM, and SAXRD results confirmed the formation of well-ordered hexagonal (p6mm) arrays of mesopores in the direction of (100). The EDS and XPS approved that N and S were successfully doped into the CMK-3 carbon framework. Results: Among all the studied CMK-3 based catalysts, the catalyst prepared by STP precursor and pyrolysis at 900°C exhibited the highest ORR activity with the onset potential of 1.02 V vs. RHE and 4 electron transfer number per oxygen molecule in 0.1 M KOH. The high catalyst durability and fuel-crossover tolerance led to stable performance of the optimal cathode after 5000 s operation, while the Pt/C cathode-based was considerably degraded. Finally, the MFC system with the optimal cathode displayed 43.9 mW·m-2 peak power density showing even reasonable performance in comparison to a Pt/C 20 wt.%.cathode. Conclusions: The results revealed that the synergistic effect of nitrogen and sulfur co-doped on the carbon substrate structure leads to improvement in catalytic activity. Also, it was clearly observed that the porous structure and order level of the carbon substrate could considerably change the ORR performance.

Topological defects involving Fe/N co-doped mesoporous carbon nanosheets as novel electrocatalysts for the oxygen reduction reaction and Zn–air batteries

Nanoscale ◽  
2021 ◽  
Author(s):  
Junjie Ding ◽  
Dongchuang Wu ◽  
Senhe Huang ◽  
Chenbao Lu ◽  
Yu Chen ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Topological Defects ◽  
Reduction Reaction ◽  
Defect Engineering ◽  
Carbon Nanosheets ◽  
Renewable Energy Technologies ◽  
Central Focus ◽  
Energy Technologies ◽  
Co Doped

Developing effective electrocatalysts for oxygen reduction reaction is of great significance for clean and renewable energy technologies, such as metal–air batteries and fuel cells. Defect engineering is the central focus...

scholarly journals Iron, Nitrogen Co‐Doped Carbon Spheres as Low Cost, Scalable Electrocatalysts for the Oxygen Reduction Reaction

2021 ◽  
pp. 2102974
Author(s):  
Jingyu Feng ◽  
Rongsheng Cai ◽  
Emanuele Magliocca ◽  
Hui Luo ◽  
Luke Higgins ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Low Cost ◽  
Reduction Reaction ◽  
Carbon Spheres ◽  
Co Doped
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