Please use this identifier to cite or link to this item:
https://doi.org/10.1039/c2ee21802j
DC Field | Value | |
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dc.title | Exploration of the active center structure of nitrogen-doped graphene-based catalysts for oxygen reduction reaction | |
dc.contributor.author | Lai, L. | |
dc.contributor.author | Potts, J.R. | |
dc.contributor.author | Zhan, D. | |
dc.contributor.author | Wang, L. | |
dc.contributor.author | Poh, C.K. | |
dc.contributor.author | Tang, C. | |
dc.contributor.author | Gong, H. | |
dc.contributor.author | Shen, Z. | |
dc.contributor.author | Lin, J. | |
dc.contributor.author | Ruoff, R.S. | |
dc.date.accessioned | 2014-06-17T07:58:28Z | |
dc.date.available | 2014-06-17T07:58:28Z | |
dc.date.issued | 2012-07 | |
dc.identifier.citation | Lai, L., Potts, J.R., Zhan, D., Wang, L., Poh, C.K., Tang, C., Gong, H., Shen, Z., Lin, J., Ruoff, R.S. (2012-07). Exploration of the active center structure of nitrogen-doped graphene-based catalysts for oxygen reduction reaction. Energy and Environmental Science 5 (7) : 7936-7942. ScholarBank@NUS Repository. https://doi.org/10.1039/c2ee21802j | |
dc.identifier.issn | 17545692 | |
dc.identifier.uri | http://scholarbank.nus.edu.sg/handle/10635/64871 | |
dc.description.abstract | We present two different ways to fabricate nitrogen-doped graphene (N-graphene) and demonstrate its use as a metal-free catalyst to study the catalytic active center for the oxygen reduction reaction (ORR). N-graphene was produced by annealing of graphene oxide (G-O) under ammonia or by annealing of a N-containing polymer/reduced graphene oxide (RG-O) composite (polyaniline/RG-O or polypyrrole/RG-O). The effects of the N precursors and annealing temperature on the performance of the catalyst were investigated. The bonding state of the N atom was found to have a significant effect on the selectivity and catalytic activity for ORR. Annealing of G-O with ammonia preferentially formed graphitic N and pyridinic N centers, while annealing of polyaniline/RG-O and polypyrrole/RG-O tended to generate pyridinic and pyrrolic N moieties, respectively. Most importantly, the electrocatalytic activity of the catalyst was found to be dependent on the graphitic N content which determined the limiting current density, while the pyridinic N content improved the onset potential for ORR. However, the total N content in the graphene-based non-precious metal catalyst does not play an important role in the ORR process. © 2012 The Royal Society of Chemistry. | |
dc.description.uri | http://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1039/c2ee21802j | |
dc.source | Scopus | |
dc.type | Article | |
dc.contributor.department | MATERIALS SCIENCE AND ENGINEERING | |
dc.description.doi | 10.1039/c2ee21802j | |
dc.description.sourcetitle | Energy and Environmental Science | |
dc.description.volume | 5 | |
dc.description.issue | 7 | |
dc.description.page | 7936-7942 | |
dc.identifier.isiut | 000305530900033 | |
Appears in Collections: | Staff Publications |
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