Influence of Chemical Activation Temperatures on Nitrogen-Doped Carbon Material Structure, Pore Size Distribution and Oxygen Reduction Reaction Activity

Catalysts

Aleksandrs Volperts¹  Aivars Zhurinsh¹  Ance Plavniece¹  Galina Dobele¹  Kätlin Kaare²  Ivar Kruusenberg² 

[1] Latvian State Institute of Wood Chemistry, LV-1006 Riga, Latvia;National Institute of Chemical Physics and Biophysics, 12618 Tallinn, Estonia;

关键词: wood;    activated carbons;    porous structure;    fuel cells;    metal-free catalyst;    oxygen reduction reaction;   

DOI  :  10.3390/catal11121460

来源: DOAJ

【 摘 要 】

The goal of this research was to synthesize activated nitrogen-doped nanocarbons with high specific surface area and adjustable pore size distribution using wood charcoal as a raw material. The resulting carbon materials were tested for possible application as oxygen reduction reaction catalysts in alkaline media. Activated carbons were obtained using a thermochemical activation method with NaOH. Nitrogen was introduced into activated carbons using dicyandiamide solution. It was demonstrated that the content of introduced nitrogen depends on oxygen content in the structure of the activated carbon. The oxygen reduction reaction activity of the activated and nitrogen-doped carbon material was comparable with a commercial 20% Pt/C catalyst. Electrocatalytic properties of the synthesized N-doped wood-derived carbon catalysts may be associated with the highly developed surface area, specific ratio of micro- and mesopores, as well as the high percentage of pyridinic nitrogen.

【 授权许可】

Unknown