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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*
  • *Corresponding author for this work

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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
JournalPNAS: Proceedings of the National Academy of Sciences of the United States of America
Volume112
Issue number12
Online published11 Mar 2015
DOIs
Publication statusPublished - 24 Mar 2015
Externally publishedYes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

  1. SDG 7 - Affordable and Clean Energy
    SDG 7 Affordable and Clean Energy

Research Keywords

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

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