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Synthesis and Characterization of Surfactant-Stabilized Pt/C Nanocatalysts for Fuel Cell Applications
Abstract
Platinum nanocatalysts supported on Vulcan XC-72 carbon have been synthesized through the reduction of chloroplatinic acid with formic acid, using surfactant tetraoctylammonium bromide (TOAB) as the stabilizer in the solvent tetrahydrofuran (THF). These nanocatalysts are synthesized by changing the molar ratio of TOAB to chloroplatinic acid, i.e., N/Pt ratio of 0.76, 0.38, and 0.19. A control catalyst that does not contain TOAB is also synthesized by this method for comparison purposes. Comparison of the morphological properties of these catalysts by transmission electron microscopy (TEM) reveals that the N/Pt ratio of 0.76 catalyst has well-separated smaller particles (2.2 nm) than the other lower molar ratio and control catalysts. X-ray diffraction (XRD) analysis indicates the presence of platinum in the fcc phase and the average size of the particles calculated from the XRD peak widths agreed well with the TEM results. X-ray photoelectron spectroscopic (XPS) measurement of the 0.76 ratio catalyst reveals that a higher amount of Pt exists in its metallic state (73.64% of Pt(O) and 26.36% Pt(II)) and the data are on par with that of the E-TEK catalyst. Stabilization effect of the TOAB on the surface of platinum particles has been discussed with respect to the different N/Pt molar ratios. The XPS technique has been exploited to prove the presence of coverage of TOAB and its subsequent removal from the surface of the Pt particles, which is considered to be the crucial step prior to the electrochemical measurements. Electrochemical measurements have demonstrated that the surface area of the 0.76 ratio catalyst is higher than that of the lower molar ratios (0.38 and 0.19).
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Citations
Cites
Particle Size Effects for Oxygen Reduction on Highly Dispersed Platinum in Acid Electrolytes
Kinoshita, K. (1990) · Journal of The Electrochemical Society · doi:10.1149/1.2086566 · Cited by 854
Shukla, A. K., Neergat, M., Bera, P., Jayaram, V, & Hegde, M. S. (2001) · Journal of Electroanalytical Chemistry · doi:10.1016/s0022-0728(01)00421-1 · Cited by 258
Cited by
Morphological Control of Catalytically Active Platinum Nanocrystals
Lee, H., Habas, S. E., Kweskin, S., Butcher, D., Somorjai, G. A., & Yang, P. (2006) · Angewandte Chemie International Edition · doi:10.1002/anie.200603068 · Cited by 659
Guo, J. W., Zhao, T. S., Prabhuram, J., & Wong, C. W. (2005) · Electrochimica Acta · doi:10.1016/j.electacta.2004.09.006 · Cited by 133
Self-citationFang, B., Kim, J. H., Lee, C., & Yu, J.-S. (2008) · The Journal of Physical Chemistry C · doi:10.1021/jp710193s · Cited by 106
Park, K. C., Jang, I. Y., Wongwiriyapan, W., Morimoto, S., Kim, Y. J., Jung, Y. C., Toya, T., & Endo, M. (2010) · Journal of Materials Chemistry · doi:10.1039/b923153f · Cited by 66
Recent advances in Pt-based octahedral nanocrystals as high performance fuel cell catalysts
Wang, J., Li, B., Yersak, T., Yang, D., Xiao, Q., Zhang, J., & Zhang, C. (2016) · Journal of Materials Chemistry A · doi:10.1039/c6ta02748b · Cited by 65
Kristian, N., Yu, Y., Lee, J.-M., Liu, X., & Wang, X. (2010) · Electrochimica Acta · doi:10.1016/j.electacta.2010.09.073 · Cited by 56
Self-citationEffects of stabilizers on the synthesis of Pt3Cox/C electrocatalysts for oxygen reduction
Kim, J. W., Heo, J. H., Hwang, S. J., Yoo, S. J., Jang, J. H., Ha, J. S., Jang, S., Lim, T.-H., Nam, S. W., & Kim, S.-K. (2011) · International Journal of Hydrogen Energy · doi:10.1016/j.ijhydene.2011.06.137 · Cited by 25
Metadata
- Authors
- Prabhuram, J., Wang, X., Hui, C. L., & Hsing, I.-M.
- Venue
- The Journal of Physical Chemistry B
- Publisher
- American Chemical Society (ACS)
- Published
- 2003-09-13
- Volume
- 107
- Issue
- 40
- Pages
- 11057-11064
- ISSN
- 1520-5207 (ISSN-L)
- 1520-6106
- OpenAlex
- W2097597848
- Cited by
- 169
- References
- 2
- FWCI
- 7.31
- Type
- journal article
- Language
- en
- Open access
- closed
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