Sulfur and nitrogen co-doped carbon nanotubes for enhancing electrochemical oxygen reduction activity in acidic and alkaline media

2013 ◽  
Vol 1 (47) ◽  
pp. 14853 ◽  
Author(s):  
Qianqian Shi ◽  
Feng Peng ◽  
Shixia Liao ◽  
Hongjuan Wang ◽  
Hao Yu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Oxygen Reduction ◽  
Alkaline Media ◽  
Reduction Activity ◽  
Acidic And Alkaline Media ◽  
Co Doped ◽  
Electrochemical Oxygen

Atomic-scaled cobalt encapsulated in P,N-doped carbon sheaths over carbon nanotubes for enhanced oxygen reduction electrocatalysis under acidic and alkaline media

2017 ◽  
Vol 53 (71) ◽  
pp. 9862-9865 ◽  
Author(s):  
Shiyu Guo ◽  
Pengfei Yuan ◽  
Jianan Zhang ◽  
Pengbo Jin ◽  
Hongming Sun ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Oxygen Reduction ◽  
Alkaline Media ◽  
Electrocatalytic Performance ◽  
Coaxial Nanocables ◽  
Acidic And Alkaline Media ◽  
Co Doped

Atomic-scaled Co were distributed in N,P co-doped C@CNT coaxial nanocables, exhibiting superior electrocatalytic performance for ORR both in acid and alkaline media.

Facile and scalable synthesis of coal tar-derived, nitrogen and sulfur-codoped carbon nanotubes with superior activity for O2 reduction by employing an evocating agent

2015 ◽  
Vol 3 (45) ◽  
pp. 22723-22729 ◽  
Author(s):  
Ziwu Liu ◽  
Xin Fu ◽  
Xianyong Wei ◽  
Feng Peng
Keyword(s):  
Carbon Nanotubes ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Coal Tar ◽  
Reduction Reaction ◽  
Alkaline Media ◽  
O2 Reduction ◽  
Acidic And Alkaline Media ◽  
Scalable Synthesis

Nitrogen and sulfur-codoped carbon nanotubes were synthesized with coal tar as nitrogen and sulfur precursors by employing the evocating agent of dicyandiamide. Resultant samples exhibited superior activities for the 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 Mononuclear Fe in N-doped carbon: computational elucidation of active sites for electrochemical oxygen reduction and oxygen evolution reactions

2020 ◽  
Vol 10 (4) ◽  
pp. 1006-1014 ◽  
Author(s):  
Rui Shang ◽  
Stephan N. Steinmann ◽  
Bo-Qing Xu ◽  
Philippe Sautet
Keyword(s):  
Oxygen Reduction ◽  
Oxygen Evolution ◽  
Electrostatic Potential ◽  
First Principles ◽  
Active Sites ◽  
High Potential ◽  
Major Influence ◽  
Co Doped ◽  
Electrochemical Oxygen

First principles simulations show that in Fe and N co-doped carbon, Fe coordination controls the activity for oxygen reduction and oxygen evolution reactions, and that including the electrostatic potential has a major influence at high potential.

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