期刊
JOURNAL OF POWER SOURCES
卷 218, 期 -, 页码 168-173出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2012.06.105
关键词
Functionalized graphene; Oxygen reduction; Fuel cell; Metal free catalyst
资金
- National Research Foundation of Korea (NRF)
- Ministry of Education, Science and Technology [2010-0007864]
Tridodecylmethylammonium chloride (TDMAC) functionalized reduced graphene oxide (TDMAC-RGO) has synthesized by a simple physicochemical process. The resultant functionalized graphene imparts electrocatalytic activity as metal- free catalysts for the oxygen reduction reaction (ORR) in fuel cells (FCs), with long-term operational stability, and tolerance to methanol and ethanol via a four-electron pathway in alkaline FCs. The ORR activities have systematically investigated by cyclic voltammetry (CV) and rotating ring disk electrode (RRDE) techniques. The results show that the TDMAC-RGO demonstrates excellent catalytic activity for oxygen reduction. Raman and X-ray photoelectron spectroscopic (XPS) measurements indicate charge transfer from the graphene sheets to the TDMAC via intermolecular charge-transfer. TDMAC-RGO catalysts are low-cost, free of metal and costly polymers, and are an efficient approach to FC applications. (C) 2012 Elsevier B.V. All rights reserved.
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