Shape-dependence of Pd nanocrystal carburization during acetylene hydrogenation

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

Research output: Contribution to journalArticle

21 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. (Graph Presented).

Original languageEnglish
Pages (from-to)1101-1107
Number of pages7
JournalJournal of Physical Chemistry C
Volume119
Issue number2
DOIs
Publication statusPublished - 2015

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Energy(all)

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    Crespo-Quesada, M., Yoon, S., Jin, M., Prestianni, A., Cortese, R., Cárdenas-Lizana, F., Duca, D., Weidenkaff, A., & Kiwi-Minsker, L. (2015). Shape-dependence of Pd nanocrystal carburization during acetylene hydrogenation. Journal of Physical Chemistry C, 119(2), 1101-1107. https://doi.org/10.1021/jp510347r