Warwick, M. E. A., Barreca, D., Bontempi, E., Carraro, G., Gasparotto, A., Maccato, C., Kaunisto, K., Ruoko, T. -P., Lemmetyinen, H., Sada, C., Goenuellue, Y. and Mathur, S. (2015). Pt-functionalized Fe2O3 photoanodes for solar water splitting: the role of hematite nano-organization and the platinum redox state. Phys. Chem. Chem. Phys., 17 (19). S. 12899 - 12908. CAMBRIDGE: ROYAL SOC CHEMISTRY. ISSN 1463-9084

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Abstract

Pt/alpha-Fe2O3 nanocomposites were synthesized on fluorine-doped tin oxide (FTO) substrates by a sequential plasma enhanced-chemical vapor deposition (PE-CVD)/radio frequency (RF) sputtering approach, tailoring the overall Pt content as a function of sputtering time. The chemico-physical properties of the as-prepared systems were extensively investigated by means of complementary techniques, including X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), field emission-scanning electron microscopy (FE-SEM), energy dispersive X-ray spectroscopy (EDXS), secondary ion mass spectrometry (SIMS), and optical absorption spectroscopy, and compared to those of the homologous Pt/alpha-Fe2O3 systems annealed in air prior and/or after sputtering. The obtained results evidenced that the material compositional, structural and morphological features, with particular regard to the Pt oxidation state and hematite nano-organization, could be finely tailored as a function of the adopted processing conditions. Pt/alpha-Fe2O3 systems were finally tested as photoanodes in photoelectrochemical (PEC) water splitting experiments, evidencing a remarkable interplay between functional performances and the above-mentioned material properties, as also testified by transient absorption spectroscopy (TAS) results.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Warwick, M. E. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Barreca, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bontempi, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Carraro, G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gasparotto, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Maccato, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kaunisto, K.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ruoko, T. -P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lemmetyinen, H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Sada, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Goenuellue, Y.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mathur, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-419643
DOI: 10.1039/c5cp01636c
Journal or Publication Title: Phys. Chem. Chem. Phys.
Volume: 17
Number: 19
Page Range: S. 12899 - 12908
Date: 2015
Publisher: ROYAL SOC CHEMISTRY
Place of Publication: CAMBRIDGE
ISSN: 1463-9084
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
ALPHA-FE2O3 THIN-FILMS; PHOTOELECTROCHEMICAL PERFORMANCE; NANOSTRUCTURED ALPHA-FE2O3; HYDROTHERMAL METHOD; ARRAYS; OXIDATION; GROWTH; ELECTRODES; SIZE; CRMultiple languages
Chemistry, Physical; Physics, Atomic, Molecular & ChemicalMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/41964

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