期刊
ELECTROCHIMICA ACTA
卷 119, 期 -, 页码 92-98出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2013.11.193
关键词
Electrocatalysis; Hybrid materials; Oxygen reduction; Electrochemistry; Prussian blue
资金
- Ministry of Education, Science and Technology of Korea
We describe a simple approach for the Prussian blue nanocubes dispersed on carbon composite (PBC/C) as a non-precious catalyst for the electrochemical oxygen reduction reaction (ORR) in alkaline medium. The interaction between Prussian blue (PB) and the carbon support was confirmed by using FT-IR, and XPS spectroscopy. PBC/C catalyst exhibits 100 mV more positive onset potential than Prussian blue supported on carbon (PB/VXC-72) for ORR. Rotating disk electrode measurements showed that PBC/C had about 17 times higher oxygen reduction mass activity compared to the PB/VXC-72 physical mixture. PBC/C hybrid catalyst exhibited superior durability in aqueous alkaline medium compared with Pt/C and also provided low H202 production confirmed by rotating ring-disk electrode measurement. The PBC/C catalyst showed better activity and selectivity, which can be attributed to the synergistic coupling effects between the PB nanocubes and carbon support. (C) 2013 Elsevier Ltd. All rights reserved.
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