High-Performance Electrocatalysts for Oxygen Reduction Based on Nitrogen-Doped PorousCarbon from Hydrothermal Treatment of Glucose and Dicyandiamide
作者：Xiaojun Liu, Ligui Li*, Weijia Zhou, Yucheng Zhou, Wenhan Niu, ShaoweiChen*
關鍵字：porous carbon, fuel cell, catalyst, oxygen reduction reaction
論文來源：期刊
具體來源：ChemElectroChem, 2015, 2, 803–810
發表時間：2015年
A synthetic method was developed for the preparation of Ndoped
porous carbon through hydrothermal treatment at controlled
temperatures by using glucose and dicyandiamide as
precursors and ZnCl2 as an activation reagent. Nitrogen doping
was quantitatively determined by using XPS measurements
and identified in the forms of pyridinic, pyrrolic, graphitic, and
pyridinic N+Onitrogen atoms. Further structural analysis by
using SEM, TEM, XRD, Raman, FTIR, and BET measurements
showed that the N-doped porous carbons exhibited a microcrystalline
graphite structure and a high specific surface area
up to 1000 m2g1. Electrochemical studies showed that the
samples all exhibited a remarkable ORR catalytic activity in alkaline
media, which was comparable to that of state-of-the-art
Pt/C catalysts, and the one prepared at 8008C was found to be
the best among the series with an onset potential of +0.96 V,
almost complete reduction of oxygen to OH, and superior
methanol tolerance and cycling stability