Journal
ACS APPLIED ENERGY MATERIALS
Volume 2, Issue 11, Pages 8294-8302Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.9b01773
Keywords
Mn3O4; hausmannite; photoelectrochemical water splitting; chemical vapor deposition; photoelectrode
Funding
- Padova University [03BIRD2018-UNIPD OXYGENA]
- INSTM Consortium [INSTMPD004 -NETTUNO]
- AMGA Foundation Mn4Energy project
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alpha-Mn3O4 (hausinannite) nanostructured films were fabricated by chemical vapor deposition (CVD) on indium tin oxide (ITO)-coated glass substrates from a beta-diketonate-diamine Mn(II) precursor. Materials were grown in a N-2 + O-2 atmosphere in the presence of water vapor, investigating the influence of growth temperature and total pressure on the system structural, compositional, morphological, and optical properties through a multitechnique characterization approach. The obtained alpha-Mn3O4 nano- deposits were ultimately tested as catalysts in the photo- electrochemical (PEC) splitting of water under simulated solar illumination, with particular focus on the interplay relationships between the adopted preparative conditions and the resulting functional performances. The amphoteric semiconducting behavior along with the PEC properties markedly dependent on the deposit nanoscale organization opens interesting avenues to an eventual implementation of the target materials in view of sustainable applications.
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