期刊
ELECTROCHIMICA ACTA
卷 222, 期 -, 页码 438-445出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2016.10.196
关键词
Nitrogen-doped carbon xerogel; Oxygen reduction reaction; Electrocatalyst; Durability; Direct borohydride fuel cell
资金
- Shenyang Agricultural University Postdoctoral Fund
- Cultivation Plan for Youth Agricultural Science and Technology Innovative Talents of Liaoning Province [201503266]
- General project of Education Department of Liaoning Province [L201547]
As a novel catalyst for oxygen reduction reaction (ORR), nitrogen-doped carbon xerogel was prepared via a sol-gel followed by the subsequent pyrolysis in ammonia atmosphere and post-treatment process. The resultant catalysts were characterized by BrunauereEmmetteTeller (BET), transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD) analysis and electrochemical measurements. The role of metal in the catalyst was studied by comparing catalytic activities of the catalysts with and without post-treatment. Results show that the catalyst with nitrogen doped on the surface possesses an amorphous microstructure. The catalysts with and without post-treatment showed almost the same ORR electrocatalytic activities, which clearly demonstrated the negligible influence of metal removal on ORR performance. The catalyst with post-treatment displayed comparable ORR activity to that of Pt/C in alkaline medium as well as superior stability. A maximum power density of 115 mW cm(-2) at 40 degrees C was achieved on the single cell with the as-prepared catalyst as cathode, demonstrating its application as promising alternative for Pt-based electrocatalysts in direct borohydride fuel cells. (C) 2016 Elsevier Ltd. All rights reserved.
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