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Core Shell Inversion during Nucleation and Growth of Bimetallic Pt/Ru Nanoparticles
Abstract
The reductive condensation of a carbon-supported molecular cluster precursor, PtRu 5 C(CO) 16, into a bimetallic nanoparticle has been followed by using in situ extended X-ray absorption fine structure spectroscopy, temperature-programmed desorption, and scanning transmission electron microscopy. The data reveal that during activation in hydrogen the metal centers associated with the molecular precursor lose the stabilizing CO shell and assume an increasingly metallic electronic character. This support-mediated condensation process is highly activated. The incipient Pt−Ru nanoparticles initially form a disordered structure at 473 K in which Pt is found preferentially at the core of the condensing particle. After further high-temperature treatment to 673 K, the nanoparticles adopt an inverted structure in which Pt appears preferentially at the surface of the equilibrated bimetallic nanoparticle.
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Cited by
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Finney, E. E., & Finke, R. G. (2008) · Journal of Colloid and Interface Science · doi:10.1016/j.jcis.2007.05.092 · Cited by 377
Yang, H., Vogel, W., Lamy, C., & Alonso-Vante, N. (2004) · The Journal of Physical Chemistry B · doi:10.1021/jp049034+ · Cited by 323
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Russell, A. E., & Rose, A. (2004) · Chemical Reviews · doi:10.1021/cr020708r · Cited by 303
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Zhong, C.-J., Luo, J., Fang, B., Wanjala, B. N., Njoki, P. N., Loukrakpam, R., & Yin, J. (2010) · Nanotechnology · doi:10.1088/0957-4484/21/6/062001 · Cited by 198
Metadata
- Authors
- Nashner, M. S., Frenkel, A. I., Somerville, D., Hills, C. W., Shapley, J. R., & Nuzzo, R. G.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 1998-07-31
- Volume
- 120
- Issue
- 32
- Pages
- 8093-8101
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2059768948
- Cited by
- 220
- References
- 0
- FWCI
- 8.91
- Type
- journal article
- Language
- en
- Open access
- closed
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- Nashner, M. S., Frenkel, A. I., Somerville, D., Hills, C. W., Shapley, J. R., & Nuzzo, R. G. (1998). Core Shell Inversion during Nucleation and Growth of Bimetallic Pt/Ru Nanoparticles. Journal of the American Chemical Society. https://doi.org/10.1021/ja980638z
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
