Título:
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Photoelectrochemical behavior of a molecular Ru-based water-oxidation catalyst bound to TiO2-protected Si photoanodes
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Autor/a:
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Matheu, Roc; Moreno-Hernández, Ivan A.; Sala, Xavier; Gray, Harry B.; Brunschwig, Bruce S.; Llobet, Antoni | Lewis, Nathan S.
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Abstract:
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A hybrid photoanode based on a molecular water oxidation precatalyst was prepared from TiO2-protected n- or p+-Si coated with multiwalled carbon nanotubes (CNT) and the ruthenium-based water oxidation precatalyst [RuIV(tda)(py-pyr)2(O)], 1(O) (tda2- is [2,2′:6′,2′′-terpyridine]-6,6′′-dicarboxylato and py-pir is 4-(pyren-1-yl)-N-(pyridin-4-ylmethyl)butanamide). The Ru complex was immobilized by π-π stacking onto CNTs that had been deposited by drop casting onto Si electrodes coated with 60 nm of amorphous TiO2 and 20 nm of a layer of sputtered C. At pH = 7 with 3 Sun illumination, the n-Si/TiO2/C/CNT/[1+1(O)] electrodes exhibited current densities of 1 mA cm-2 at 1.07 V vs NHE. The current density was maintained for > 200 min at a constant potential while intermittently collecting voltammograms that indicated that over half of the Ru was still in molecular form after O2 evolution. |
Fecha de creación:
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2017 |
Derechos:
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Copyright © 2017 American Chemical Society |
Tipo de documento:
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Artículo |
DOI:
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https://dx.doi.org/10.1021/jacs.7b06800.
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Editor:
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American Chemical Society
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Publish at:
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Journal of the American Chemical Society
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Compartir:
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