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Lookup NU author(s): Dr Dragos Neagu,
Dr Kelly Kousi,
Professor Ian Metcalfe
This is the authors' accepted manuscript of an article that has been published in its final definitive form by American Chemical Society, 2019.
For re-use rights please refer to the publisher's terms and conditions.
Carbon dioxide and steam solid oxide co-electrolysis is a key technology for exploiting renewable electricity to generate syngas feedstock for the Fischer–Tropsch synthesis. The integration of this process with methane partial oxidation in a single cell can eliminate or even reverse the electrical power demands of co-electrolysis, while simultaneously producing syngas at industrially attractive H2/CO ratios. Nevertheless, this system is rather complex and requires catalytically active and coke tolerant electrodes. Here, we report on a low-substitution rhodium-titanate perovskite (La0.43Ca0.37Rh0.06Ti0.94O3) electrode for the process, capable of exsolving high Rh nanoparticle populations, and assembled in a symmetrical solid oxide cell configuration. By introducing dry methane to the anode compartment, the electricity demands are impressively decreased, even allowing syngas and electricity cogeneration. To provide further insight on the Rh nanoparticles role on methane-to-syngas conversion, we adjusted their size and population by altering the reduction temperature of the perovskite. Our results exemplify how the exsolution concept can be employed to efficiently exploit noble metals for activating low-reactivity greenhouse gases in challenging energy-related applications.
Author(s): Kyriakou V, Neagu D, Zafeiropoulos G, Sharma RK, Tang C, Kousi K, Metcalfe I
Publication type: Article
Publication status: Published
Journal: ACS Catalysis
Print publication date: 17/01/2020
Online publication date: 16/12/2019
Acceptance date: 12/12/2019
Date deposited: 27/01/2020
ISSN (electronic): 2155-5435
Publisher: American Chemical Society
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