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Deconvolution of octahedral Pt3Ni nanoparticle growth pathway from in situ characterizations.
Shen, Xiaochen; Zhang, Changlin; Zhang, Shuyi; Dai, Sheng; Zhang, Guanghui; Ge, Mingyuan; Pan, Yanbo; Sharkey, Stephen M; Graham, George W; Hunt, Adrian; Waluyo, Iradwikanari; Miller, Jeffrey T; Pan, Xiaoqing; Peng, Zhenmeng.
Afiliación
  • Shen X; Department of Chemical and Biomolecular Engineering, The University of Akron, Akron, OH, 44325, USA.
  • Zhang C; Department of Chemical and Biomolecular Engineering, The University of Akron, Akron, OH, 44325, USA.
  • Zhang S; Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI, 48109, USA.
  • Dai S; Department of Materials Science and Engineering, University of California-Irvine, Irvine, CA, 92697, USA.
  • Zhang G; Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI, 48109, USA.
  • Ge M; Department of Materials Science and Engineering, University of California-Irvine, Irvine, CA, 92697, USA.
  • Pan Y; Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN, 47907, USA.
  • Sharkey SM; National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, NY, 11973, USA.
  • Graham GW; Department of Chemical and Biomolecular Engineering, The University of Akron, Akron, OH, 44325, USA.
  • Hunt A; Department of Chemical and Biomolecular Engineering, The University of Akron, Akron, OH, 44325, USA.
  • Waluyo I; Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI, 48109, USA.
  • Miller JT; Department of Materials Science and Engineering, University of California-Irvine, Irvine, CA, 92697, USA.
  • Pan X; National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, NY, 11973, USA.
  • Peng Z; National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, NY, 11973, USA. iwaluyo@bnl.gov.
Nat Commun ; 9(1): 4485, 2018 10 26.
Article en En | MEDLINE | ID: mdl-30367046
ABSTRACT
Understanding the growth pathway of faceted alloy nanoparticles at the atomic level is crucial to morphology control and property tuning. Yet, it remains a challenge due to complexity of the growth process and technical limits of modern characterization tools. We report a combinational use of multiple cutting-edge in situ techniques to study the growth process of octahedral Pt3Ni nanoparticles, which reveal the particle growth and facet formation mechanisms. Our studies confirm the formation of octahedral Pt3Ni initiates from Pt nuclei generation, which is followed by continuous Pt reduction that simultaneously catalyzes Ni reduction, resulting in mixed alloy formation with moderate elemental segregation. Carbon monoxide molecules serve as a facet formation modulator and induce Ni segregation to the surface, which inhibits the (111) facet growth and causes the particle shape to evolve from a spherical cluster to an octahedron as the (001) facet continues to grow.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2018 Tipo del documento: Article País de afiliación: Estados Unidos
Texto completo
Añadir a Mi BVS
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XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2018 Tipo del documento: Article País de afiliación: Estados Unidos