The DOI matches its Crossref record; 7 of the 7 references it cites were found in a registry or an index.
Synthesis of Pd−Pt Bimetallic Nanocrystals with a Concave Structure through a Bromide-Induced Galvanic Replacement Reaction
Abstract
This article describes a systematic study of the galvanic replacement reaction between PtCl(6)(2-) ions and Pd nanocrystals with different shapes, including cubes, cuboctahedrons, and octahedrons. It was found that Br(-) ions played an important role in initiating, facilitating, and directing the replacement reaction. The presence of Br(-) ions led to the selective initiation of galvanic replacement from the {100} facets of Pd nanocrystals, likely due to the preferential adsorption of Br(-) ions on this crystallographic plane. The site-selective galvanic replacement resulted in the formation of Pd-Pt bimetallic nanocrystals with a concave structure owing to simultaneous dissolution of Pd atoms from the {100} facets and deposition of the resultant Pt atoms on the {111} facets. The Pd-Pt concave nanocubes with different weight percentages of Pt at 3.4, 10.4, 19.9, and 34.4 were also evaluated as electrocatalysts for the oxygen reduction reaction (ORR). Significantly, the sample with a 3.4 wt.% of Pt exhibited the largest specific electrochemical surface area and was found to be four times as active as the commercial Pt/C catalyst for the ORR in terms of equivalent Pt mass.
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Citations
Cites
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Recent Advances in Electrocatalysts for Oxygen Reduction Reaction
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Synthesis of colloidal metal and metal alloy nanoparticles for electrochemical energy applications
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Metadata
- Authors
- Zhang, H., Jin, M., Wang, J., Li, W., Camargo, P. H. C., Kim, M. J., Yang, D., Xie, Z., & Xia, Y.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2011-03-25
- Volume
- 133
- Issue
- 15
- Pages
- 6078-6089
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2012962352
- Cited by
- 430
- References
- 7
- FWCI
- 17.34
- Type
- journal article
- Language
- en
- Open access
- closed
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