Synthesis of nitrogen-doped graphene and its catalytic activity for the oxygen reduction reaction in fuel cells

被引：0

作者：

Ma, Gui-Xiang ^{[1
,2
]}

Zhao, Jiang-Hong ^{[1
]}

Zheng, Jian-Feng ^{[1
]}

Zhu, Zhen-Ping ^{[1
]}

机构：

[1] State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China

[2] Graduate University of Chinese Academy of Sciences, Beijing 100049, China

来源：

Xinxing Tan Cailiao/New Carbon Materials | 2012年 / 27卷 / 04期

关键词：

Catalyst activity - Doping (additives) - Electrodes - Electrolytic reduction - Fuel cells - Graphene oxide - Graphite - Nitrogen - Oxygen;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Graphene was synthesized by the detonation-assisted reduction of graphite oxide (GO) prepared by the modified Hummers method. Nitrogen-doped reduced GO(N-RGO) was obtained through an in-situ nitrogen-doping during detonation. The morphology, elemental composition and structure of the N-RGO were characterized by TEM, SEM, IR, XPS, XRD and Raman spectroscopy. The catalytic activity of the N-RGO as a fuel cell electrode for the oxygen reduction reaction (ORR) was investigated by a rotating ring disk electrode technique. Results showed that the GO was exfoliated and reduced to few layer graphene by the detonation. The oxygen-containing species of GO were reduced and the C/O molar ratio was increased to 26.2, which is much higher than for RGO. Nitrogen, as high as 2.11 at%, was incorporated into the graphene structure. The diffusion-limited current for ORR increased from 0.24 mA for RGO to 0.49 mA for N-RGO, indicating a higher catalytic activity of N-RGO for ORR than that of RGO.

引用

页码：258 / 265