Transforming organic-rich amaranthus waste into nitrogen-doped carbon with superior performance of the oxygen reduction reaction

2015 ◽  
Vol 8 (1) ◽  
pp. 221-229 ◽  
Author(s):  
Shuyan Gao ◽  
Keran Geng ◽  
Haiying Liu ◽  
Xianjun Wei ◽  
Min Zhang ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Superior Performance ◽  
Nitrogen Doped ◽  
Single Precursor ◽  
Nitrogen Doped Carbon ◽  
Highly Porous

Amaranthus waste is reported to be a single precursor to synthesize highly porous nitrogen-doped carbon as a superior oxygen reduction electrocatalyst.

scholarly journals Efficient oxygen reduction reaction by a highly porous, nitrogen-doped carbon sphere electrocatalyst through space confinement effect in nanopores

2021 ◽  
Author(s):  
Zheyang Mo ◽  
Weiyi Yang ◽  
Shuang Gao ◽  
Jian Ku Shang ◽  
Yajun Ding ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Active Sites ◽  
Reduction Reaction ◽  
Confinement Effect ◽  
Carbon Sphere ◽  
Nitrogen Doped ◽  
Electron Reduction ◽  
Nitrogen Doped Carbon ◽  
Highly Porous

AbstractA highly porous nitrogen-doped carbon sphere (NPC) electrocatalyst was prepared through the carbonization of biomass carbon spheres mixed with urea and zinc chloride in N2 atmosphere. The sample carbonized at 1000 °C demonstrates a superior oxygen reduction reaction (ORR) performance over the Pt/C electrocatalyst, while its contents of pyridinic nitrogen and graphitic nitrogen are the lowest among samples synthesized at the same or lower carbonization temperatures. This unusual result is explained by a space confinement effect from the microporous and mesoporous structures in the microflakes, which induces the further reduction of peroxide ions or other oxygen species produced in the first step reduction to water to have the preferred overall four electron reduction ORR process. This work demonstrates that in addition to the amount or species of its active sites, the space confinement can be a new approach to enhance the ORR performance of precious-metal-free, nitrogen-doped carbon electrocatalysts.

Sign in / Sign up

Export Citation Format

Share Document