Size dependent catalytic effect of TiO2 clusters in water dissociation

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Hongbo Du
  • Abir De Sarkar
  • Haisheng Li
  • Qiang Sun
  • Yu Jia

Detail(s)

Original languageEnglish
Pages (from-to)163-170
Journal / PublicationJournal of Molecular Catalysis A: Chemical
Volume366
Publication statusPublished - Jan 2013

Abstract

We performed systematic first principles calculations based on density functional theory to probe the energetics of dissociation of water molecules on small (TiO2)n (n = 3, 4, 6, 8, and 10) clusters. We found that the (TiO2)n clusters have a strong ability to adsorb water molecules and the dissociative adsorption of water molecules on the surface of (TiO2)n clusters with a three step process is irreversible, size-dependent and energetically more favorable than the same on the surfaces of titanium oxide. Charged (TiO2)n cluster also have strong ability in H2O molecule splitting similar as neutral ones. The efficiency of water molecules dissociating on (TiO2) n cluster surface varies inversely with the cluster size due to the steric effect. Our results indicate a higher efficiency of small clusters of titanium oxide in dissociating water molecules than its low index surfaces of bulk terminated. © 2012 Elsevier B.V.

Research Area(s)

  • Density functional calculation, Dissociative adsorption, Reaction energy barrier, Titanium oxide cluster, Water molecule

Citation Format(s)

Size dependent catalytic effect of TiO2 clusters in water dissociation. / Du, Hongbo; De Sarkar, Abir; Li, Haisheng et al.
In: Journal of Molecular Catalysis A: Chemical, Vol. 366, 01.2013, p. 163-170.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review