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Issue 3, 2018
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Earth abundant perovskite oxides for low temperature CO2 conversion

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Abstract

Conversion of CO2 in a scalable technology has the potential for enormous energy and environmental impact but remains a challenge. We present several stable, earth abundant perovskite oxide materials for the reverse water gas shift chemical looping (RWGS-CL) process as a potential solution for this CO2 mitigation problem. This material and process combination circumvents issues plaguing other emerging technologies, viz. poor rates of CO2 conversion, high operation temperatures, use of precious metal catalysts, or combinations thereof. Using DFT-calculated oxygen vacancy formation energy, a key descriptor for the RWGS-CL process, we have successfully predicted several earth abundant perovskite oxides with high CO2 conversion capability. We simultaneously achieved 100% selective CO generation from CO2 at the highest known rates (∼160 μmoles per min per gram perovskite oxide) at record low process temperatures of 450–500 °C using lanthanum and calcium based perovskite oxides. These materials are stable over several RWGS-CL cycles, enabling industrial implementation.

Graphical abstract: Earth abundant perovskite oxides for low temperature CO2 conversion

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Publication details

The article was received on 28 Nov 2017, accepted on 15 Jan 2018 and first published on 15 Jan 2018


Article type: Paper
DOI: 10.1039/C7EE03383D
Citation: Energy Environ. Sci., 2018,11, 648-659
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    Earth abundant perovskite oxides for low temperature CO2 conversion

    D. Maiti, B. J. Hare, Y. A. Daza, A. E. Ramos, J. N. Kuhn and V. R. Bhethanabotla, Energy Environ. Sci., 2018, 11, 648
    DOI: 10.1039/C7EE03383D

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