Universität zu Köln

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:	Creators Email ORCID ORCID Put Code Warwick, M. E. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Barreca, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bontempi, E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Carraro, G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Gasparotto, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Maccato, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kaunisto, K. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ruoko, T. -P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Lemmetyinen, H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Sada, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Goenuellue, Y. UNSPECIFIED UNSPECIFIED UNSPECIFIED Mathur, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED
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:	Keywords Language ALPHA-FE2O3 THIN-FILMS; PHOTOELECTROCHEMICAL PERFORMANCE; NANOSTRUCTURED ALPHA-FE2O3; HYDROTHERMAL METHOD; ARRAYS; OXIDATION; GROWTH; ELECTRODES; SIZE; CR Multiple languages Chemistry, Physical; Physics, Atomic, Molecular & Chemical Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/41964