Journal
ELECTROCHIMICA ACTA
Volume 232, Issue -, Pages 114-122Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2017.02.144
Keywords
Metal-organic gel; Carbon nanotubes; Electrocatalyst; Oxygen reduction reaction
Categories
Funding
- Fundamental Research Funds for the Central Universities [buctrc201526]
- Changzhou Sci Tech Program [CJ20159006, CJ20160007]
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A urea/carbon nanotubes (CNTs)-decorated metal-organic gel(Fe) was used as self-sacrifice precursors to prepare nano-sized Fe-Fe2O3@ N-doped-C(NC) particles scattered on N-doped CNTs (NCNTs) through pyrolysis at 700 degrees C in N-2. The particles with average size of similar to 10 nm have core@ shell structures with Fe-Fe2O3 cores and NC shells, and the Fe-Fe2O3 cores effectively connect with the NCNT scaffolds via the NC shells. Such a unique structure makes the material a superior oxygen reduction catalyst with an early onset potential (0.92 V), an early half-wave potential (0.72 V), a high current retention (91.7%, after 20,000 s), and good methanol tolerance in an alkaline electrolyte, enabling the catalyst the best among the developed Fe-FeOx oxygen reduction catalysts. (C) 2017 Elsevier Ltd. All rights reserved.
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