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- W2747734125 abstract "We present a sol–gel processed hematite–titania-based photoanode, which exhibits a photocurrent of up to 2.5 mA/cm2 at 1.23 VRHE under simulated AM 1.5 G illumination (100 mW/cm2) thanks to the addition of an amorphous cocatalyst with the nominal composition Fe20Cr40Ni40Ox. To unveil the role of the cocatalyst interconnected to the photoanode, we performed impedance measurements. According to the one order of magnitude higher value for the capacitance associated with surface states (CSS) compared to the bare photoanode, the function of the catalyst−photoanode interface resembles that of a p−n-like junction. In addition, the charge transfer resistance associated with charge transfer processes from surface states (Rct,ss) was unchanged at potentials between 0.8 and 1.1 VRHE after adding the cocatalyst, indicating that the catalyst has a negligible effect on the hole transport to the electrolyte. The understanding of the role of oxygen evolution catalysts (OECs) in conjunction with the photoanodes is particularly important for water splitting because most OECs are studied separately at considerably higher potentials compared to the potentials at which photoanode materials are operated." @default.
- W2747734125 created "2017-08-31" @default.
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- W2747734125 date "2017-08-15" @default.
- W2747734125 modified "2023-10-16" @default.
- W2747734125 title "Multicomposite Nanostructured Hematite–Titania Photoanodes with Improved Oxygen Evolution: The Role of the Oxygen Evolution Catalyst" @default.
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- W2747734125 doi "https://doi.org/10.1021/acsomega.7b00696" @default.
- W2747734125 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6641740" @default.
- W2747734125 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/31457745" @default.
- W2747734125 hasPublicationYear "2017" @default.
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