4.8 Article

Photooxidation of Chloride by Oxide Minerals: Implications for Perchlorate on Mars

Journal

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 133, Issue 44, Pages 17521-17523

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/ja2064878

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Funding

  1. Wyoming NASA Space Grant Consortium
  2. University of Wyoming School of Energy Resources
  3. DOE [DE-FG03-96ER14625, DE-FG02-05ER15750s]

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We show that highly oxidizing valence band holes, produced by ultraviolet (UV) illumination of naturally occurring semiconducting minerals, are capable of oxidizing chloride ion to perchlorate in aqueous solutions at higher rates than other known natural perchlorate production processes. Our results support an alternative to atmospheric reactions leading to the formation of high concentrations of perchlorate on Mars.

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