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Photoelectrochemical Behavior of a Molecular Ru-Based Water-Oxidation Catalyst Bound to TiO2-Protected Si Photoanodes.

Publication ,  Journal Article
Matheu, R; Moreno-Hernandez, IA; Sala, X; Gray, HB; Brunschwig, BS; Llobet, A; Lewis, NS
Published in: Journal of the American Chemical Society
August 2017

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.

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Published In

Journal of the American Chemical Society

DOI

EISSN

1520-5126

ISSN

0002-7863

Publication Date

August 2017

Volume

139

Issue

33

Start / End Page

11345 / 11348

Related Subject Headings

  • General Chemistry
  • 40 Engineering
  • 34 Chemical sciences
  • 03 Chemical Sciences
 

Citation

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Matheu, R., Moreno-Hernandez, I. A., Sala, X., Gray, H. B., Brunschwig, B. S., Llobet, A., & Lewis, N. S. (2017). Photoelectrochemical Behavior of a Molecular Ru-Based Water-Oxidation Catalyst Bound to TiO2-Protected Si Photoanodes. Journal of the American Chemical Society, 139(33), 11345–11348. https://doi.org/10.1021/jacs.7b06800
Matheu, Roc, Ivan A. Moreno-Hernandez, Xavier Sala, Harry B. Gray, Bruce S. Brunschwig, Antoni Llobet, and Nathan S. Lewis. “Photoelectrochemical Behavior of a Molecular Ru-Based Water-Oxidation Catalyst Bound to TiO2-Protected Si Photoanodes.Journal of the American Chemical Society 139, no. 33 (August 2017): 11345–48. https://doi.org/10.1021/jacs.7b06800.
Matheu R, Moreno-Hernandez IA, Sala X, Gray HB, Brunschwig BS, Llobet A, et al. Photoelectrochemical Behavior of a Molecular Ru-Based Water-Oxidation Catalyst Bound to TiO2-Protected Si Photoanodes. Journal of the American Chemical Society. 2017 Aug;139(33):11345–8.
Matheu, Roc, et al. “Photoelectrochemical Behavior of a Molecular Ru-Based Water-Oxidation Catalyst Bound to TiO2-Protected Si Photoanodes.Journal of the American Chemical Society, vol. 139, no. 33, Aug. 2017, pp. 11345–48. Epmc, doi:10.1021/jacs.7b06800.
Matheu R, Moreno-Hernandez IA, Sala X, Gray HB, Brunschwig BS, Llobet A, Lewis NS. Photoelectrochemical Behavior of a Molecular Ru-Based Water-Oxidation Catalyst Bound to TiO2-Protected Si Photoanodes. Journal of the American Chemical Society. 2017 Aug;139(33):11345–11348.
Journal cover image

Published In

Journal of the American Chemical Society

DOI

EISSN

1520-5126

ISSN

0002-7863

Publication Date

August 2017

Volume

139

Issue

33

Start / End Page

11345 / 11348

Related Subject Headings

  • General Chemistry
  • 40 Engineering
  • 34 Chemical sciences
  • 03 Chemical Sciences