| Download | - View supplementary information: Electrochemical in-situ activation of Fe-oxide nanowires for the reverse water gas shift reaction (DOCX, 2.0 MiB)
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| DOI | Resolve DOI: https://doi.org/10.1016/j.apcatb.2020.118826 |
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| Author | Search for: Panaritis, ChristopherORCID identifier: https://orcid.org/0000-0002-8597-3041; Search for: Zgheib, Johnny; Search for: Ebrahim, Sayed A. H.; Search for: Couillard, Martin1; Search for: Baranova, Elena A.ORCID identifier: https://orcid.org/0000-0001-5993-2740 |
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| Affiliation | - National Research Council of Canada. Energy, Mining and Environment
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| Format | Text, Article |
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| Subject | reverse water-gas shift (RWGS); iron-oxide; electrochemical promotion of catalysis; CO₂ utilization; NEMCA |
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| Abstract | The catalytic activity of FeOₓ nanowires (Ø = 5−6 nm) deposited on yttria-stabilized zirconia (YSZ) solid-electrolyte was enhanced through the application of external current or potential for the reverse water gas shift (RWGS) reaction. As shown by XPS, the as-prepared FeOₓ nanowires consist of the mixture of oxides: Fe₂O₃, Fe₃O₄ and some FeO. The nanowires showed 99 % selectivity to CO under both open-circuit and electrochemical polarization. We found that the oxidation state of iron depended on the reaction temperature and was in-situ controlled and modified upon anodic and cathodic polarization. Anodic polarization at 335 and 400 °C led to a 200 % increase in the reaction rate due to the electrooxidation of inactive FeₓC and supply of oxygen ions from YSZ to FeOₓ resulting in the formation of active oxide. Cathodic polarization resulted in up to 4-fold rate increase due to catalyst reduction increasing the coverage of CO₂ on the surface. |
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| Publication date | 2020-02-29 |
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| Publisher | Elsevier |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | e897244f-28eb-4b86-a6db-e7b95ec19e8d |
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| Record created | 2020-06-26 |
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| Record modified | 2020-10-30 |
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