Exploring Stable and Selective Anode Materials for the Electrochemical Oxidative Coupling of Methane (EOCM): A Case Study of Doped Titanates
The electrochemical oxidative coupling of methane (EOCM) is an emerging process through which methane can be converted into value-added products such as ethylene. However, this application is hampered by the fact that a stable and ethylene-selective anode material does not currently exist. In this s...
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Published in | ECS transactions Vol. 111; no. 6; pp. 2259 - 2270 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
The Electrochemical Society, Inc
19.05.2023
|
Online Access | Get full text |
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Summary: | The electrochemical oxidative coupling of methane (EOCM) is an emerging process through which methane can be converted into value-added products such as ethylene. However, this application is hampered by the fact that a stable and ethylene-selective anode material does not currently exist. In this study, we analyse a selection of titanate-based anode materials: SrTi
0.3
Fe
0.63
Co
0.07
O
3
, SrTi
0.65
Fe
0.35
O
3
and La
0.3
Sr
0.7
TiO
3
. We analyse the stability of these materials under EOCM operating conditions using post-mortem characterisations involving XRD, XPS and EDS analyses. We also characterise the ethylene production of these anode materials at similar current densities. We find that Fe/Co-doped titanates are unstable under EOCM conditions and undergo significant phase decomposition while La
0.3
Sr
0.7
TiO
3
remains stable over several weeks of operation. |
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ISSN: | 1938-5862 1938-6737 |
DOI: | 10.1149/11106.2259ecst |