Nitrogen-doped carbon nanofibers on expanded graphite as oxygen reduction electrocatalysts

被引：59

作者：

Buan, Marthe E. M. ^{[1
]}

Muthuswamy, Navaneethan ^{[1
]}

Walmsley, John C. ^{[2
]}

Chen, De ^{[1
]}

Ronning, Magnus ^{[1
]}

机构：

[1] Norwegian Univ Sci & Technol, Dept Chem Engn, N-7491 Trondheim, Norway

[2] SINTEF Mat & Chem, Hogskoleringen 5, N-7465 Trondheim, Norway

来源：

CARBON | 2016年 / 101卷

关键词：

METAL ELECTROCATALYSTS; BINDING-ENERGY; FREE CATALYST; GRAPHENE; NANOTUBES; FE; NANOSTRUCTURES; ALKALINE; IRON; CNX;

D O I：

10.1016/j.carbon.2016.01.081

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A single-step chemical vapor deposition method using simple gaseous precursors was employed to grow nitrogen-doped carbon nanofibers from Fe and Ni particles on the surface of expanded graphite (N-CNF/EG). Due to the high electronic conductivity of the expanded graphite the N-CNF/EG could be used as electrocatalysts without the need for harsh purification procedures. Electrochemical testing showed that the N-CNFs grown from Fe exhibited a notable activity for the oxygen reduction in both acidic and alkaline electrolyte, in addition to demonstrating a high durability with a well-preserved catalytic activity after 1600 cycles in O-2-saturated 0.5 M H2SO4. Physicochemical characterization revealed the formation of N-CNFs with a bamboo-like structure, encapsulated Fe particles and high pyridinic nitrogen content. The combination of high ORR-activity, an easily scalable synthesis approach and a highly conductive support material makes N-CNF/EG a promising oxygen reduction catalyst for low temperature fuel cells. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：191 / 202

页数：12

共 61 条

[1]

[Anonymous], 2013, Electrocatalysis in Fuel Cells, DOI DOI 10.1007/978-1-4471-4911-8

[2] Tuning the Acid/Base Properties of Nanocarbons by Functionalization via Amination [J].