The DOI matches its Crossref record; 5 of the 5 references it cites were found in a registry or an index.
Electrocatalytic Activity and Interconnectivity of Pt Nanoparticles on Multiwalled Carbon Nanotubes for Fuel Cells
Abstract
Platinum nanoparticles (NPs) have been successfully assembled on noncovalently poly(diallyldimethylammonium chloride)-functionalized multiwalled carbon nanotubes (MWCNTs) via microwave-assisted polyol reduction and seed-mediated growth methods. Pt NPs were uniformly deposited on MWCNT support with Pt loading of 10−93 wt %. The results show that the increase in the Pt NP loading on MWCNTs leads to a positive shift of the peak potential for the reduction of Pt−OH ad, a negative shift of the peak potential for oxidation of adsorbed CO, an increase in the peak current for the methanol oxidation reaction, and a positive shift for the half-wave potential of the oxygen reduction reaction in acid solutions, even though the size of the Pt NPs also increased with the Pt loading. The increase of the electrocatalytic activity of Pt/MWCNTs shows a characteristic S-shaped profile as a function of the Pt NP loading. To explain the S-shaped dependence of the activity of Pt/MWCNTs on Pt loading, a new concept of interconnectivity of Pt NPs was introduced. Interconnectivity is defined as the ratio of the total number of interconnections between particles divided by the total number of particles involved. The results indicate a close correlation between the electrocatalytic activities of Pt/MWCNTs catalysts and the interconnectivity of Pt NPs on MWCNTs. The electrocatalytic activity of the Pt/MWCNTs was found to first increase linearly and then level off with the interconnectivity of Pt NPs on MWCNTs. The optimum interconnectivity of Pt NPs on MWCNTs is ∼3, which corresponds to a Pt loading of 50 wt % in the Pt/MWCNTs. The reason for the enhanced catalysis with increased interconnectivity of Pt NPs is considered to be associated with a significant increase in the number of grain boundaries, which are considered to contain the active sites for the fuel cell reactions.
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Citations
Cites
Formation of carbon-supported PtM alloys for low temperature fuel cells: a review
Antolini, E. (2003) · Materials Chemistry and Physics · doi:10.1016/s0254-0584(02)00389-9 · Cited by 624
Arenz, M., Mayrhofer, K. J. J., Stamenkovic, V., Blizanac, B. B., Tomoyuki, T., Ross, P. N., & Markovic, N. M. (2005) · Journal of the American Chemical Society · doi:10.1021/ja043602h · Cited by 556
Synthesis of Monodisperse Pt Nanocubes and Their Enhanced Catalysis for Oxygen Reduction
Wang, C., Daimon, H., Lee, Y., Kim, J., & Sun, S. (2007) · Journal of the American Chemical Society · doi:10.1021/ja070440r · Cited by 555
Maillard, F., Schreier, S., Hanzlik, M., Savinova, E. R., Weinkauf, S., & Stimming, U. (2005) · Phys. Chem. Chem. Phys. · doi:10.1039/b411377b · Cited by 448
Growing Pt Nanowires as a Densely Packed Array on Metal Gauze
Lee, E. P., Peng, Z., Cate, D. M., Yang, H., Campbell, C. T., & Xia, Y. (2007) · Journal of the American Chemical Society · doi:10.1021/ja074312e · Cited by 184
Cited by
Electroreduction of carbon monoxide to liquid fuel on oxide-derived nanocrystalline copper
Li, C. W., Ciston, J., & Kanan, M. W. (2014) · Nature · doi:10.1038/nature13249 · Cited by 1,728
Grain-Boundary-Dependent CO 2 Electroreduction Activity
Feng, X., Jiang, K., Fan, S., & Kanan, M. W. (2015) · Journal of the American Chemical Society · doi:10.1021/ja5130513 · Cited by 694
Bimetallic Aerogels: High‐Performance Electrocatalysts for the Oxygen Reduction Reaction
Liu, W., Rodriguez, P., Borchardt, L., Foelske, A., Yuan, J., Herrmann, A., Geiger, D., Zheng, Z., Kaskel, S., Gaponik, N., et al. (2013) · Angewandte Chemie International Edition · doi:10.1002/anie.201303109 · Cited by 277
Carbon nanocages: A new support material for Pt catalyst with remarkably high durability
Wang, X. X., Tan, Z. H., Zeng, M., & Wang, J. N. (2014) · Scientific Reports · doi:10.1038/srep04437 · Cited by 156
Self-citationSheng, W., Chen, S., Vescovo, E., & Shao-Horn, Y. (2011) · Journal of The Electrochemical Society · doi:10.1149/2.009202jes · Cited by 150
Metadata
- Authors
- Wang, S., Jiang, S. P., White, T. J., Guo, J., & Wang, X.
- Venue
- The Journal of Physical Chemistry C
- Publisher
- American Chemical Society (ACS)
- Published
- 2009-10-05
- Volume
- 113
- Issue
- 43
- Pages
- 18935-18945
- ISSN
- 1932-7447 (ISSN-L)
- 1932-7455
- OpenAlex
- W2075922777
- Cited by
- 247
- References
- 5
- FWCI
- 10.60
- Type
- journal article
- Language
- en
- Open access
- closed
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- Wang, S., Jiang, S. P., White, T. J., Guo, J., & Wang, X. (2009). Electrocatalytic Activity and Interconnectivity of Pt Nanoparticles on Multiwalled Carbon Nanotubes for Fuel Cells. The Journal of Physical Chemistry C. https://doi.org/10.1021/jp906923z
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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