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submitted on 18.09.2020 and posted on 18.09.2020by Takuma Higo, Jun-Ichiro Makiura, Yutaro Kurosawa, Kota Murakami, Shuhei Ogo, Hideaki Tsuneki, Yasushi Hashimoto, Yasushi Sato, Yasushi Sekine
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 Cu–In–structured oxide,
even at lower temperatures. Results show that 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 CuxIny
alloy. Key factors for high CO2 splitting were fast migration of
oxide ions in 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.