Shape-Dependence of Pd Nanocrystal Carburization during Acetylene Hydrogenation

Antonio Prestianni, Dario Duca, Remedios Cortese, Songhak Yoon, Fernando Cárdenas-Lizana, Mingshang Jin, Micaela Crespo-Quesada, Lioubov Kiwi-Minsker, Anke Weidenkaff

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

This interdisciplinary work combines the use of shape- and size-defined Pd nanocrystals (cubes of 10 and 18 nm, and octahedra of 37 nm) with in situ techniques and DFT calculations to unravel the dynamic phenomena with respect to Pd reconstruction taking place during acetylene hydrogenation. Notably, it was found that the reacting Pd surface evolved at a different pace depending on the shape of the Pd nanocrystals, due to their specific propensity to form carbides under reaction conditions. Indeed, Pd cubes (Pd(100)) reacted with acetylene to form a PdC0.13 phase at a rate roughly 6-fold higher than that of octahedra (Pd(111)), resulting in nanocrystals with different degrees of carburization. DFT calculations revealed changes in the electronic and geometric properties of the Pd nanocrystals imposed by the progressive addition of carbon in its lattice.
Original languageEnglish
Pages (from-to)1101-1107
Number of pages7
JournalJOURNAL OF PHYSICAL CHEMISTRY. C
Volume19 (2)
Publication statusPublished - 2015

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • General Energy
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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