Gd-Ni-Sb-SnO2 electrocatalysts for active and selective ozone production

James L. Lansing, Lingyan Zhao, Tana Siboonruang, Nuwan H. Attanayake, Angela B. Leo, Peter Fatouros, So Min Park, Kenneth R. Graham, John A. Keith, Maureen Tang

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


Direct electrochemical production of dissolved ozone could potentially provide economic wastewater treatment and sanitation or a valuable chemical oxidant. Although Ni-Sb-SnO2 electrocatalysts have the highest known faradaic efficiencies for electrochemical ozone production, the activity and selectivity are not yet sufficient for commercial implementation. This work finds that co-doping Ni and Gd increases the ozone selectivity by a factor of three over Ni alone. These findings are the first demonstration of an active dopant other than Ni in SnO2. Electrochemical and physical characterization show that trends in ozone activity are caused by chemical catalysis, not morphology effects, and that conduction band alignment is not a catalytic descriptor for the system. Selective radical quenching experiments and quantum chemistry calculations of thermodynamic energies suggest that the kinetic barriers to form solution-phase intermediates are important for understanding the role of dopants in electrochemical ozone production.

Original languageEnglish
Article numbere17486
JournalAICHE Journal
Issue number12
StatePublished - Dec 2021

Bibliographical note

Publisher Copyright:
© 2021 American Institute of Chemical Engineers.


  • electrocatalysis
  • ozone

ASJC Scopus subject areas

  • Biotechnology
  • Environmental Engineering
  • General Chemical Engineering


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