Stable solar-driven oxidation of water by semiconducting photoanodes protected by transparent catalytic nickel oxide films

Ke Sun, Fadl H. Saadi, Michael F. Lichterman, William G. Hale, Hsin Ping Wang, Xinghao Zhou, Noah T. Plymale, Stefan T. Omelchenko, Jr Hau He, Kimberly M. Papadantonakis, Bruce S. Brunschwig, Nathan S. Lewis

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128 Citations (Scopus)

Abstract

Reactively sputtered nickel oxide (NiOx) films provide transparent, antireflective, electrically conductive, chemically stable coatings that also are highly active electrocatalysts for the oxidation of water to O2(g). These NiOx coatings provide protective layers on a variety of technologically important semiconducting photoanodes, including textured crystalline Si passivated by amorphous silicon, crystalline n-type cadmium telluride, and hydrogenated amorphous silicon. Under anodic operation in 1.0 M aqueous potassium hydroxide (pH 14) in the presence of simulated sunlight, the NiOx films stabilized all of these self-passivating, high-efficiency semiconducting photoelectrodes for >100 h of sustained, quantitative solar-driven oxidation of water to O2(g).

Original languageEnglish
Pages (from-to)3612-3617
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume112
Issue number12
DOIs
Publication statusPublished - Mar 24 2015

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Keywords

  • Electrocatalysis
  • Nickel oxide
  • Photoanode stabilization
  • Solar-driven water oxidation

ASJC Scopus subject areas

  • General

Cite this

Sun, K., Saadi, F. H., Lichterman, M. F., Hale, W. G., Wang, H. P., Zhou, X., Plymale, N. T., Omelchenko, S. T., He, J. H., Papadantonakis, K. M., Brunschwig, B. S., & Lewis, N. S. (2015). Stable solar-driven oxidation of water by semiconducting photoanodes protected by transparent catalytic nickel oxide films. Proceedings of the National Academy of Sciences of the United States of America, 112(12), 3612-3617. https://doi.org/10.1073/pnas.1423034112