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Precursor engineering of hydrotalcite-derived redox sorbents for reversible and stable thermochemical oxygen storage

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Title: Precursor engineering of hydrotalcite-derived redox sorbents for reversible and stable thermochemical oxygen storage
Authors: High, M
Patzschke, C
Zheng, L
Zeng, D
Gavalda Diaz, O
Ding, N
Chien, KHH
Zhang, Z
Wilson, G
Berenov, A
Skinner, S
Campbell, K
Xiao, R
Fennell, PAUL
Song, Q
Item Type: Journal Article
Abstract: Chemical looping processes based on multiple-step reduction and oxidation of metal oxides hold great promise for a variety of energy applications, such as CO2 capture and conversion, gas separation, energy storage, and redox catalytic processes. Copper-based mixed oxides are one of the most promising candidate materials with a high oxygen storage capacity. However, the structural deterioration and sintering at high temperatures is one key scientific challenge. Herein, we report a precursor engineering approach to prepare durable copper-based redox sorbents for use in thermochemical looping processes for combustion and gas purification. Calcination of the CuMgAl hydrotalcite precursors formed mixed metal oxides consisting of CuO nanoparticles dispersed in the MgAl oxide support which inhibits the formation of copper aluminates during redox cycling. The copperbased redox sorbents demonstrated enhanced reaction rates, stable O2 storage capacity over 500 redox cycles at 900 °C, and efficient gas purification over a broad temperature range. We expect that our materials design strategy has broad implications on synthesis and engineering of mixed metal oxides for a range of thermochemical processes and redox catalytic applications.
Date of Acceptance: 1-Aug-2022
URI: http://hdl.handle.net/10044/1/98637
ISSN: 2041-1723
Publisher: Nature Research
Journal / Book Title: Nature Communications
Volume: 13
Copyright Statement: This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/ licenses/by/4.0/. © The Author(s) 2022
Sponsor/Funder: Engineering & Physical Science Research Council (E
Engineering & Physical Science Research Council (E
Funder's Grant Number: Bth Ref: RC-CE1204
Publication Status: Published
Open Access location: https://www.nature.com/articles/s41467-022-32593-6
Appears in Collections:Materials
Chemical Engineering
Grantham Institute for Climate Change
Faculty of Natural Sciences
Faculty of Engineering

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