Journal article
Gd-Ni-Sb-SnO2 electrocatalysts for active and selective ozone production
AIChE journal, v 67(12), pn/a
01 Dec 2021
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
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.
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Details
- Title
- Gd-Ni-Sb-SnO2 electrocatalysts for active and selective ozone production
- Creators
- James L. Lansing - Drexel UniversityLingyan Zhao - University of PittsburghTana Siboonruang - Drexel UniversityNuwan H. Attanayake - Drexel UniversityAngela B. Leo - University of PittsburghPeter Fatouros - University of PittsburghSo Min Park - University of KentuckyKenneth R. Graham - University of KentuckyJohn A. Keith - University of PittsburghMaureen Tang - Drexel University
- Publication Details
- AIChE journal, v 67(12), pn/a
- Publisher
- Wiley
- Number of pages
- 11
- Grant note
- 1659324; 1855657; 1856460 / National Science Foundation; National Science Foundation (NSF) SC0018208 / Department of Energy, Office of Science; United States Department of Energy (DOE)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Chemical and Biological Engineering
- Web of Science ID
- WOS:000708027600001
- Scopus ID
- 2-s2.0-85117170661
- Other Identifier
- 991019168081604721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Engineering, Chemical