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Phase Transformations in physical mixtures of Pd-Cu nanoparticles

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Abstract

The temperature induced structural transformations in physical mixtures of 1nm palladium and ultrafine (∼0.5nm) copper nanoparticles supported on carbon were studied using in-situ real time synchrotron based x-ray diffraction. These nanoparticles were subjected to two-step thermal annealing from 25°C to 700°C. The Pd and Cu nanoparticles were found to coalesce forming alloy nanoparticles that subsequently undergo a structural phase transformation from ordered B2 to disordered fcc. The random alloy formed at the end of the thermal treatments was found to be copper-rich.

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Authors and Affiliations

  1. Department of Physics, Purdue University, West Lafayette, IN, 47907, USA

    Vineetha Mukundan & Oana Malis

  2. Department of Chemistry, SUNY, Binghamton, NY, 13902, USA

    Jun Yin & Chuan-Jian Zhong

Authors
  1. Vineetha Mukundan
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  2. Jun Yin
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  3. Chuan-Jian Zhong
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  4. Oana Malis
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Mukundan, V., Yin, J., Zhong, CJ. et al. Phase Transformations in physical mixtures of Pd-Cu nanoparticles. MRS Online Proceedings Library 1528, 1204 (2013). https://doi.org/10.1557/opl.2013.367

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  • DOI: https://doi.org/10.1557/opl.2013.367

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