The DOI matches its Crossref record; 42 of the 42 references it cites were found in a registry or an index.
Formation of Active Sites for Oxygen Reduction Reactions by Transformation of Nitrogen Functionalities in Nitrogen-Doped Carbon Nanotubes
Abstract
Heat treating nitrogen-doped multiwalled carbon nanotubes containing up to six different types of nitrogen functionalities transforms particular nitrogen functionalities into other types which are more catalytically active toward oxygen reduction reactions (ORR). In the first stage, the unstable pyrrolic functionalities transform into pyridinic functionalities followed by an immediate transition into quaternary center and valley nitrogen functionalities. By measuring the electrocatalytic oxidation reduction current for the different samples, we achieve information on the catalytic activity connected to each type of nitrogen functionality. Through this, we conclude that quaternary nitrogen valley sites, N-Q(valley), are the most active sites for ORR in N-CNTs. The number of electrons transferred in the ORR is determined from ring disk electrode and rotating ring disk electrode measurements. Our measurements indicate that the ORR processes proceed by a direct four-electron pathway for the N-Q(valley) and the pyridinic sites while it proceeds by an indirect two-electron pathway via hydrogen peroxide at the N-Q(center) sites. Our study gives both insights on the mechanism of ORR on different nitrogen functionalities in nitrogen-doped carbon nanostructures and it proposes how to treat samples to maximize the catalytic efficiency of such samples.
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Cites
Nitrogen-Doped Carbon Nanotube Arrays with High Electrocatalytic Activity for Oxygen Reduction
Gong, K., Du, F., Xia, Z., Durstock, M., & Dai, L. (2009) · Science · doi:10.1126/science.1168049 · Cited by 7,188
Co3O4 nanocrystals on graphene as a synergistic catalyst for oxygen reduction reaction
Liang, Y., Li, Y., Wang, H., Zhou, J., Wang, J., Regier, T., & Dai, H. (2011) · Nature Materials · doi:10.1038/nmat3087 · Cited by 5,494
Raman spectroscopy of carbon nanotubes
Dresselhaus, M. S., Dresselhaus, G., Saito, R., & Jorio, A. (2005) · Physics Reports · doi:10.1016/j.physrep.2004.10.006 · Cited by 4,499
Lai, L., Potts, J. R., Zhan, D., Wang, L., Poh, C. K., Tang, C., Gong, H., Shen, Z., Lin, J., & Ruoff, R. S. (2012) · Energy & Environmental Science · doi:10.1039/c2ee21802j · Cited by 2,277
Evolution of nitrogen functionalities in carbonaceous materials during pyrolysis
Pels, J. R., Kapteijn, F., Moulijn, J. A., Zhu, Q., & Thomas, K. M. (1995) · Carbon · doi:10.1016/0008-6223(95)00154-6 · Cited by 2,041
Carbon nanotubes and nanofibers in catalysis
Serp, P., Corrias, M., & Kalck, P. (2003) · Applied Catalysis A: General · doi:10.1016/s0926-860x(03)00549-0 · Cited by 1,854
An oxygen reduction electrocatalyst based on carbon nanotube–graphene complexes
Li, Y., Zhou, W., Wang, H., Xie, L., Liang, Y., Wei, F., Idrobo, J.-C., Pennycook, S. J., & Dai, H. (2012) · Nature Nanotechnology · doi:10.1038/nnano.2012.72 · Cited by 1,618
The characterization of activated carbons with oxygen and nitrogen surface groups
Biniak, S., Szymański, G., Siedlewski, J., & Świątkowski, A. (1997) · Carbon · doi:10.1016/s0008-6223(97)00096-1 · Cited by 1,513
Metal Nanoparticles and Related Materials Supported on Carbon Nanotubes: Methods and Applications
Wildgoose, G. G., Banks, C. E., & Compton, R. G. (2006) · Small · doi:10.1002/smll.200500324 · Cited by 1,010
The role of nanostructure in nitrogen-containing carbon catalysts for the oxygen reduction reaction
MATTER, P., ZHANG, L., & OZKAN, U. (2006) · Journal of Catalysis · doi:10.1016/j.jcat.2006.01.022 · Cited by 889
Cited by
Recent advancements in Pt and Pt-free catalysts for oxygen reduction reaction
Nie, Y., Li, L., & Wei, Z. (2015) · Chemical Society Reviews · doi:10.1039/c4cs00484a · Cited by 2,156
Oxygen Reduction in Alkaline Media: From Mechanisms to Recent Advances of Catalysts
Ge, X., Sumboja, A., Wuu, D., An, T., Li, B., Goh, F. W. T., Hor, T. S. A., Zong, Y., & Liu, Z. (2015) · ACS Catalysis · doi:10.1021/acscatal.5b00524 · Cited by 1,341
Wu, G., Santandreu, A., Kellogg, W., Gupta, S., Ogoke, O., Zhang, H., Wang, H.-L., & Dai, L. (2016) · Nano Energy · doi:10.1016/j.nanoen.2015.12.032 · Cited by 744
Carbon-based electrocatalysts for advanced energy conversion and storage
Zhang, J., Xia, Z., & Dai, L. (2015) · Science Advances · doi:10.1126/sciadv.1500564 · Cited by 735
Wu, J., Ma, S., Sun, J., Gold, J. I., Tiwary, C., Kim, B., Zhu, L., Chopra, N., Odeh, I. N., Vajtai, R., et al. (2016) · Nature Communications · doi:10.1038/ncomms13869 · Cited by 658
Metadata
- Authors
- Sharifi, T., Hu, G., Jia, X., & Wågberg, T.
- Venue
- ACS Nano
- Publisher
- American Chemical Society (ACS)
- Published
- 2012-10-08
- Volume
- 6
- Issue
- 10
- Pages
- 8904-8912
- ISSN
- 1936-0851 (ISSN-L)
- 1936-086X
- OpenAlex
- W1965320422
- Cited by
- 593
- References
- 42
- FWCI
- 18.59
- Type
- journal article
- Language
- en
- Open access
- closed
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