Thermally stable N 2-Intercalated WO 3 photoanodes for water oxidation

Qixi Mi, Yuan Ping, Yan Li, Bingfei Cao, Bruce S. Brunschwig, Peter G. Khalifah, Giulia A. Galli, Harry B. Gray, Nathan S Lewis

Research output: Contribution to journalArticle

81 Citations (Scopus)

Abstract

We describe stable intercalation compounds of the composition xN 2̇WO 3 (x = 0.034-0.039), formed by trapping N 2 in WO 3. The incorporation of N 2 significantly reduced the absorption threshold of WO 3; notably, 0.039N 2̇WO 3 anodes exhibited photocurrent under illumination at wavelengths ≥640 nm with a faradaic efficiency for O 2 evolution in 1.0 M HClO 4(aq) of nearly unity. Spectroscopic and computational results indicated that deformation of the WO 3 host lattice, as well as weak electronic interactions between trapped N 2 and the WO 3 matrix, contributed to the observed red shift in optical absorption. Noble-gas-intercalated WO 3 materials similar to xN 2̇WO 3 are predicted to function as photoanodes that are responsive to visible light.

Original languageEnglish
Pages (from-to)18318-18324
Number of pages7
JournalJournal of the American Chemical Society
Volume134
Issue number44
DOIs
Publication statusPublished - Nov 7 2012

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Noble Gases
Intercalation compounds
Inert gases
Photocurrents
Light absorption
Anodes
Lighting
Wavelength
Oxidation
Water
Chemical analysis
Electrodes
Light

ASJC Scopus subject areas

  • Chemistry(all)
  • Catalysis
  • Biochemistry
  • Colloid and Surface Chemistry

Cite this

Thermally stable N 2-Intercalated WO 3 photoanodes for water oxidation. / Mi, Qixi; Ping, Yuan; Li, Yan; Cao, Bingfei; Brunschwig, Bruce S.; Khalifah, Peter G.; Galli, Giulia A.; Gray, Harry B.; Lewis, Nathan S.

In: Journal of the American Chemical Society, Vol. 134, No. 44, 07.11.2012, p. 18318-18324.

Research output: Contribution to journalArticle

Mi, Q, Ping, Y, Li, Y, Cao, B, Brunschwig, BS, Khalifah, PG, Galli, GA, Gray, HB & Lewis, NS 2012, 'Thermally stable N 2-Intercalated WO 3 photoanodes for water oxidation', Journal of the American Chemical Society, vol. 134, no. 44, pp. 18318-18324. https://doi.org/10.1021/ja3067622
Mi Q, Ping Y, Li Y, Cao B, Brunschwig BS, Khalifah PG et al. Thermally stable N 2-Intercalated WO 3 photoanodes for water oxidation. Journal of the American Chemical Society. 2012 Nov 7;134(44):18318-18324. https://doi.org/10.1021/ja3067622
Mi, Qixi ; Ping, Yuan ; Li, Yan ; Cao, Bingfei ; Brunschwig, Bruce S. ; Khalifah, Peter G. ; Galli, Giulia A. ; Gray, Harry B. ; Lewis, Nathan S. / Thermally stable N 2-Intercalated WO 3 photoanodes for water oxidation. In: Journal of the American Chemical Society. 2012 ; Vol. 134, No. 44. pp. 18318-18324.
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