Sulfur-Doped Graphene as an Efficient Metal-free Cathode Catalyst for Oxygen Reduction
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- 作者：Zhi Yang ; Zhen Yao ; Guifa Li ; Guoyong Fang ; Huagui Nie ; Zheng Liu ; Xuemei Zhou ; Xi鈥檃n Chen ; Shaoming Huang
- 刊名：ACS Nano
- 出版年：2012
- 出版时间：January 24, 2012
- 年：2012
- 卷：6
- 期：1
- 页码：205-211
- 全文大小：454K
- 年卷期：v.6,no.1(January 24, 2012)
- ISSN：1936-086X
文摘
Tailoring the electronic arrangement of graphene by doping is a practical strategy for producing significantly improved materials for the oxygen-reduction reaction (ORR) in fuel cells (FCs). Recent studies have proven that the carbon materials doped with the elements, which have the larger (N) or smaller (P, B) electronegative atoms than carbon such as N-doped carbon nanotubes (CNTs), P-doped graphite layers and B-doped CNTs, have also shown pronounced catalytic activity. Herein, we find that the graphenes doped with the elements, which have the similar electronegativity with carbon such as sulfur and selenium, can also exhibit better catalytic activity than the commercial Pt/C in alkaline media, indicating that these doped graphenes hold great potential for a substitute for Pt-based catalysts in FCs. The experimental results are believed to be significant because they not only give further insight into the ORR mechanism of these metal-free doped carbon materials, but also open a way to fabricate other new low-cost NPMCs with high electrocatalytic activity by a simple, economical, and scalable approach for real FC applications.