Achieving excellent activity and stability for oxygen reduction electrocatalysis by hollow mesoporous iron–nitrogen-doped graphitic carbon spheres

2017 ◽  
Vol 5 (24) ◽  
pp. 12243-12251 ◽  
Author(s):  
Tingsheng Zhou ◽  
Yao Zhou ◽  
Ruguang Ma ◽  
Qian Liu ◽  
Yufang Zhu ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Alkaline Media ◽  
Carbon Spheres ◽  
Nitrogen Doped ◽  
Excellent Activity ◽  
Acidic And Alkaline Media ◽  
Mesoporous Structures

Fe–N–C graphitic spheres prepared via in situ polymerization and functionalization possess both chemical functions (Fe–Nx-coordinated moieties) and hollow mesoporous structures, demonstrating exceptional activity and stability for the 4e− oxygen reduction reaction in both acidic and alkaline media.

scholarly journals Superior FexN electrocatalyst derived from 1,1′-diacetylferrocene for oxygen reduction reaction in alkaline and acidic media

2020 ◽  
Vol 9 (1) ◽  
pp. 843-852
Author(s):  
Hunan Jiang ◽  
Jinyang Li ◽  
Mengni Liang ◽  
Hanpeng Deng ◽  
Zuowan Zhou
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Current Density ◽  
Active Sites ◽  
Reduction Reaction ◽  
Alkaline Media ◽  
Acidic Media ◽  
Onset Potential ◽  
Acidic And Alkaline Media ◽  
The Stability

AbstractAlthough Fe–N/C catalysts have received increasing attention in recent years for oxygen reduction reaction (ORR), it is still challenging to precisely control the active sites during the preparation. Herein, we report FexN@RGO catalysts with the size of 2–6 nm derived from the pyrolysis of graphene oxide and 1,1′-diacetylferrocene as C and Fe precursors under the NH3/Ar atmosphere as N source. The 1,1′-diacetylferrocene transforms to Fe3O4 at 600°C and transforms to Fe3N and Fe2N at 700°C and 800°C, respectively. The as-prepared FexN@RGO catalysts exhibited superior electrocatalytic activities in acidic and alkaline media compared with the commercial 10% Pt/C, in terms of electrochemical surface area, onset potential, half-wave potential, number of electrons transferred, kinetic current density, and exchange current density. In addition, the stability of FGN-8 also outperformed commercial 10% Pt/C after 10000 cycles, which demonstrates the as-prepared FexN@RGO as durable and active ORR catalysts in acidic media.

scholarly journals In situ synthesis of metal embedded nitrogen doped carbon nanotubes as an electrocatalyst for the oxygen reduction reaction with high activity and stability

RSC Advances ◽  
2018 ◽  
Vol 8 (44) ◽  
pp. 25051-25056 ◽  
Author(s):  
Yanhong Yin ◽  
Hengbo Zhang ◽  
Rongzhen Gao ◽  
Aili Wang ◽  
Xinxin Mao ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
High Activity ◽  
Reduction Reaction ◽  
In Situ Synthesis ◽  
Nitrogen Doped ◽  
Nitrogen Doped Carbon

In this work, a Co–N doped carbon nanotube (CNT) catalyst was fabricated via a simple pyrolysis approach.

2D Layered non-precious metal mesoporous electrocatalysts for enhanced oxygen reduction reaction

2017 ◽  
Vol 5 (10) ◽  
pp. 4868-4878 ◽  
Author(s):  
Lili Huo ◽  
Baocang Liu ◽  
Geng Zhang ◽  
Rui Si ◽  
Jian Liu ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Specific Surface ◽  
Oxygen Reduction ◽  
Electrocatalytic Activity ◽  
Precious Metal ◽  
Reduction Reaction ◽  
High Specific Surface Area ◽  
Alkaline Media ◽  
Homogeneous Distribution ◽  
Acidic And Alkaline Media

2D Layered meso-M/N-C/N-G nanocomposites with high specific surface area, homogeneous distribution of ultra-small M-N-C nanoparticles less than 5 nm, and mesopores with a size of ∼3.6 nm exhibit excellent electrocatalytic activity toward oxygen reduction reaction (ORR) in acidic and alkaline media.

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