期刊
JOURNAL OF POWER SOURCES
卷 281, 期 -, 页码 94-102出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2015.01.167
关键词
Oxygen reduction; Nitrogen doping; Few-layer graphene; Carbon nanotubes; Non-platinum catalysts; Alkaline fuel cell
资金
- Estonian Ministry of Education and Research [IUT20-16]
- Estonian Research Council [9323]
- Archimedes Foundation [3.2.0501.10-0015]
- MIDE Research Programme
- Aalto University
Direct methanol fuel cells are assembled and evaluated using Fumatech FAA3 alkaline anion exchange membrane. Two novel metal-free cathode catalysts are synthesised, investigated and compared with the commercial Pt-based catalyst. In this work nitrogen-doped few-layer graphene/multi-walled carbon nanotube (N-FLG/MWCNT) composite and nitrogen-doped MWCNT (N-MWCNT) catalyst are prepared by pyrolysing the mixture of dicyandiamide (DCDA) and carbon nanomaterials at 800 degrees C. The resulting cathode catalyst material shows a remarkable electrocatalytic activity for oxygen reduction reaction (ORR) in 0.1 M KOH solution employing the rotating disk electrode (RDE) method. Fuel cell tests are performed by using 1 M methanol as anode and pure oxygen gas cathode feed. The maximum power density obtained with the N-FLG/MWCNT material (0.72 mW cm(-2)) is similar to that of the Pt/C catalyst (0.72 mW cm(-2)), whereas the N-MWCNT material shows higher peak power density (0.92 mW cm(-2)) than the commercial Pt/C catalyst. (C) 2015 Elsevier B.V. All rights reserved.
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