Addressing Solar Photochemistry Durability with an Amorphous Nickel Antimonate Photoanode: Article No. 100959

Lan Zhou, Elizabeth Peterson, Karun Rao, Yubing Lu, Xiang Li, Yungchieh Lai, Sage Bauers, Matthias Richter, Kevin Kan, Yu Wang, Paul Newhouse, Yunko Yano, Jeffrey Neaton, Michal Bajdich, John Gregoire

Research output: Contribution to journalArticlepeer-review

6 Scopus Citations

Abstract

Renewable generation of fuels using solar energy is a promising technology whose deployment hinges on the discovery of materials with a combination of durability and solar-to-chemical conversion efficiency that has yet to be demonstrated. Stable operation of photoanodes has been demonstrated with wide-gap semiconductors, as well as protected visible gap semiconductors. Visible photoresponse from electrochemically stable materials is quite rare. In this paper, we report the high-throughput discovery of an amorphous Ni-Sb (1:1) oxide photoanode that meets the requirements of operational stability, visible photoresponse, and appreciable photovoltage. X-ray absorption characterization of Ni and Sb establishes a structural connection to rutile NiSb2O6, guiding electronic structure characterization via X-ray photoelectron experiments and density functional theory. This amorphous photoanode opens avenues for photoelectrode development due to the lack of crystal anisotropy combined with its operational stability, which mitigates the formation of an interphase that disrupts the semiconductor-electrolyte junction.
Original languageAmerican English
Number of pages23
JournalCell Reports Physical Science
Volume3
Issue number7
DOIs
StatePublished - 2022

NREL Publication Number

  • NREL/JA-5K00-82423

Keywords

  • amorphous
  • electronic structure
  • high-throughput experimentation
  • nickel antimonate
  • OER
  • oxygen evolution reaction
  • photoanode
  • photoelectrochemistry
  • pourbaix stability
  • solar fuels
  • X-ray absorption spectroscopy

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