Comparative study of the anchorage and the catalytic properties of nanoporous TiO2 films modified with ruthenium (II) and rhenium (I) carbonyl complexes

Diego P. Oyarzún, Sylvie Chardon-Noblat, Omar E. Linarez Pérez, Manuel López Teijelo, César Zúñiga, Ximena Zarate, Eduardo Shott, Alexander Carreño, Ramiro Arratia-Perez

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In this article we study the anchoring of cis-[Ru(bpyC4pyr)(CO)2(CH3CN)2]2+, cis-[Ru(bpy)2(CO)2]2+ and cis-[Ru(bpyac)(CO)2Cl2], onto nanoporous TiO2 employing electropolymerization, electrostatic interaction and chemical bonding. Also, the [Re(bpyac)(CO)3Cl] rhenium(I) complex for chemical anchorage was analyzed. The characterization of TiO2/Ru(II) and TiO2/Re(I) nanocomposite films was performed by field emission scanning electron microscopy (FESEM), electron dispersive X-ray spectroscopy (EDS) and Raman spectroscopy. In addition, for the more stable nanocomposites obtained, the catalytic properties (solar energy conversion and CO2 reduction) were evaluated. The efficiency improvement in redox process derived from the (photo)electrochemical evidence indicates that modified nanoporous TiO2 structures enhance the rate of charge transfer reactions.

Original languageEnglish
Pages (from-to)40-47
Number of pages8
JournalChemical Physics Letters
Volume694
DOIs
Publication statusPublished - 16 Feb 2018

Keywords

  • Catalytic properties
  • EDS mapping
  • Nanoporous TiO films
  • Rhenium complex
  • Ruthenium complex

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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