Affiliation of Author(s):材料科学与技术学院

Journal:CHINESE JOURNAL OF INORGANIC CHEMISTRY

Key Words:tungsten nitride electrocatalysis ordered mesoporous carbon oxygen reduction reaction fuel cells

Abstract:Tungsten nitride-Tungsten/nitrogen doped ordered mesoporous carbon (WN/W-NOMC), as a non precious-metal cathode catalyst for oxygen reduction reaction (ORR), was successfully synthesized through a soft template method. The amount of nitrogen was adjusted by urea, and when the content of nitrogen was 7%(w/w), the obtained composite had highly ordered mesoporous structure, and its specific surface area reached to 835 m(2) Transmission electron microscope (TEM) shows that the catalytic particles were uniform supported on NOMC. ORR test was conducted in O-2-staturated 0.1 mol.L-1 KOH solution, the oneset potential is 0.87 V (vs RHE) and the limiting current density is 4.49 mA.cm(-2). The transfer number of electron was 3.4, which was close to commercial 20%(w/w) Pt/C (3.8), indicated that WN-NOMC exhibited an approximate 4e(-) transfer pathway during the ORR process. Though the catalytic activity is less than Pt/C, the excellent methanol tolerance and long-time electrochemical stability make WN-W/NOMC to be a potential electrode catalyst for ORR.

ISSN No.:1001-4861

Translation or Not:no

Date of Publication:2018-11-10

Co-author:Li Ling-Hui,Tao Wang,Fan Xiao-Li,Song Lianlian,Gong Hao,Xia Weijie,jc,gb,hjp

Correspondence Author:Shen Guohua