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Fast Oxygen Ion Migration in Cu–In–oxide Bulk and Its Utilization for Effective CO2 Conversion at Lower Temperature

preprint
submitted on 18.09.2020 and posted on 18.09.2020 by 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.

History

Email Address of Submitting Author

t-higo@aoni.waseda.jp

Institution

Waseda University

Country

Japan

ORCID For Submitting Author

0000-0002-2742-0836

Declaration of Conflict of Interest

no conflict of interest

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