Low-loading cobalt coupled with nitrogen-doped porous graphene as excellent electrocatalyst for oxygen reduction reaction

We developed a facile method to synthesize nanocomposites of cobalt loaded nitrogen doped graphene (Co-N-rGO), acting as a highly active non-precious metal catalyst for the oxygen reduction reaction (ORR). In alkaline media, the Co-N-rGO catalyst displayed a low overpotential, larger current density...

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Published inJournal of materials chemistry. A, Materials for energy and sustainability Vol. 2; no. 24; pp. 9079 - 9084
Main Authors Zheng, Bo, Wang, Jiong, Wang, Feng-Bin, Xia, Xing-Hua
Format Journal Article
LanguageEnglish
Published 01.01.2014
Subjects
Catalysts
Cobalt
Current density
Graphene
Methyl alcohol
Reduction
Specific surface
Sustainability
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Summary:We developed a facile method to synthesize nanocomposites of cobalt loaded nitrogen doped graphene (Co-N-rGO), acting as a highly active non-precious metal catalyst for the oxygen reduction reaction (ORR). In alkaline media, the Co-N-rGO catalyst displayed a low overpotential, larger current density, better durability, and methanol tolerance ability toward ORR. Kinetic parameter analysis showed a high selectivity to an apparent four-electron transfer process on the Co-N-rGO catalyst for ORR with an average electron transfer number of 3.97. The excellent activity of the Co-N-rGO catalyst (0.44% Co) may result from its well-constructed porosity with high specific surface area and a synergistic effect between the N-rGO and cobalt oxide species.
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ISSN:2050-7488
2050-7496
DOI:10.1039/c4ta01043d