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Chromium Oxide-Ruthenium Oxide Solid Solution Anode Implemented in a Solid Phosphate Electrolyzer at 240 °C and 28 Bar Overpressure
This work offers an overview of the synthesis and implementation of various chromium-ruthenium oxide materials for gas-phase solid-acid water electrolysis under hydrothermal conditions (240 °C, 28 bar of Ar and steam overpressure). The oxidic solid solutions show general stability over a broad chrom...
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Published in: | Journal of the Electrochemical Society 2024-01, Vol.171 (1), p.13505 |
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Main Authors: | , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites |
Online Access: | Get full text |
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Summary: | This work offers an overview of the synthesis and implementation of various chromium-ruthenium oxide materials for gas-phase solid-acid water electrolysis under hydrothermal conditions (240 °C, 28 bar of Ar and steam overpressure). The oxidic solid solutions show general stability over a broad chromium concentration range in the RuO
2
rutile structure during synthesis. Decomposition of the solid solutions is observed over a potential of around 2.1 V during electrolysis (including the Ohmic contribution of the setup and cell). Electrolysis performed below this decomposition potential shows promising results for replacing pure RuO
2
with a low ruthenium-containing anode. Special attention has been given to Cr
0.6
Ru
0.4
O
2
for being less expensive because of the lower ruthenium content and showing good stability and comparable performance to RuO
2
during continuous chronopotentiometry operation for 1 h at 75 mA cm
−2
current densities. |
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ISSN: | 0013-4651 1945-7111 |
DOI: | 10.1149/1945-7111/ad2055 |