Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/140524
Citations | ||
Scopus | Web of Science® | Altmetric |
---|---|---|
?
|
?
|
Type: | Journal article |
Title: | Enhancing electrochemical methane coupling in solid oxide cells by tuning oxygen species in the catalyst |
Author: | Xu, X. Li, H. Han, X. Zheng, Y. |
Citation: | Journal of Materials Chemistry A, 2024; 12(9):5115-5123 |
Publisher: | Royal Society of Chemistry (RSC) |
Issue Date: | 2024 |
ISSN: | 2050-7488 2050-7496 |
Statement of Responsibility: | Xiaoyong Xu, Haobo Li, Xu Han and Yao Zheng |
Abstract: | Due to the rapid growth of shale gas production, the oxidative coupling of methane (OCM) to ethylene and ethane has attracted renewed interest. This process requires efficient catalysts capable of activating the first C–H bond of methane while inhibiting the complete dehydrogenation and over-oxidation to CO2. Here, we successfully implemented OCM in a solid oxide cell, which can usually control the reaction process more accurately and reduce the generation of by-products. La-doped SrTiO3 perovskite oxides (LST) with controlled formation of oxygen vacancies and lattice oxygen species were synthesized as anode materials for a solid oxide cell. By changing the ratio of La/Sr in the perovskite A-site, La0.7Sr0.2TiO3−d exhibited the best performance in terms of methane conversion and C2 (ethane and ethylene) selectivity due to its highest oxygen evolution reaction activity, highest lattice oxygen content, and few oxygen vacancies. Density functional theory (DFT) calculations further confirmed that the activation of methane is more favorable to occur on the surface with less oxygen vacancies and more lattice oxygen, resulting in a significantly higher conversion rate. This work opens a new avenue for designing anode materials for methane-coupling in solid oxide cells. |
Keywords: | Methane (CH4) renewable biomass |
Rights: | © The Royal Society of Chemistry 2024 |
DOI: | 10.1039/d3ta07648b |
Grant ID: | http://purl.org/au-research/grants/arc/DP190103472 http://purl.org/au-research/grants/arc/FT200100062 http://purl.org/au-research/grants/arc/LP210301397 |
Published version: | http://dx.doi.org/10.1039/d3ta07648b |
Appears in Collections: | Research Outputs |
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.