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- W2316513067 abstract "Nanoporous NiO thin film electrodes were obtained via plasma-assisted microwave sintering and characterized by means of a combination of electrochemical techniques and X-ray photoelectron spectroscopy (XPS). The aim of this study is the elucidation of the nature of the surface changes introduced by the redox processes of this nanostructured material. NiO undergoes two distinct electrochemical processes of oxidation in aqueous electrolyte with the progress of NiO anodic polarization. These findings are consistent with the sequential formation of oxyhydroxide species at the surface, the chemical nature of which was assessed by XPS. Electronic relaxation effects in the Ni 2p spectra clearly indicated that the superficial oxyhydroxide species resulted to be β-NiOOH and γ-NiOOH. We also show for the first time spectral evidence of an electrochemically generated Ni(IV) species. This study has direct relevance for those applications in which NiO electrodes are utilized in aqueous electrolyte, namely catalytic water splitting or electrochromism, and may constitute a starting point for the comprehension of electronic phenomena at the NiO/organic electrolyte interface of cathodic dye-sensitized solar cells (p-DSCs)." @default.
- W2316513067 created "2016-06-24" @default.
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- W2316513067 date "2013-12-16" @default.
- W2316513067 modified "2023-10-18" @default.
- W2316513067 title "Probing the Redox States at the Surface of Electroactive Nanoporous NiO Thin Films" @default.
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- W2316513067 doi "https://doi.org/10.1021/am403671h" @default.
- W2316513067 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/24325361" @default.
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