Fast oxygen ion migration in Cu–In–oxide bulk and its utilization for effective CO2 conversion at lower temperature

Efficient activation of CO2 at low temperature was achieved by reverse water–gas shift via chemical looping (RWGS-CL) by virtue of fast oxygen ion migration in a Cu–In structured oxide, even at lower temperatures. Results show that a novel Cu–In2O3 structured oxide can show a remarkably higher CO2 s...

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Published inChemical science (Cambridge) Vol. 12; no. 6; pp. 2108 - 2113
Main Authors Jun-Ichiro Makiura, Higo, Takuma, Kurosawa, Yutaro, Murakami, Kota, Ogo, Shuhei, Tsuneki, Hideaki, Hashimoto, Yasushi, Sato, Yasushi, Sekine, Yasushi
Format Journal Article
LanguageEnglish
Published Cambridge Royal Society of Chemistry 01.01.2021
The Royal Society of Chemistry
Subjects
Carbon dioxide
Chemistry
Conversion
Copper base alloys
Indium oxides
Ion migration
Low temperature
Oxidation
Oxygen ions
Splitting
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Summary:Efficient activation of CO2 at low temperature was achieved by reverse water–gas shift via chemical looping (RWGS-CL) by virtue of fast oxygen ion migration in a Cu–In structured oxide, even at lower temperatures. Results show that a novel Cu–In2O3 structured oxide can show a remarkably higher CO2 splitting rate than ever reported. Various analyses revealed that RWGS-CL on Cu–In2O3 is derived from redox between Cu–In2O3 and Cu–In alloy. Key factors for high CO2 splitting rate were fast migration of oxide ions in the alloy and the preferential oxidation of the interface of alloy–In2O3 in the bulk of the particles. The findings reported herein can open up new avenues to achieve effective CO2 conversion at lower temperatures.
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ISSN:2041-6520
2041-6539
DOI:10.1039/d0sc05340f