Syngas production at intermediate temperature through H2O and CO2 electrolysis with a Cu-based solid oxide electrolyzer cell
Syngas production at intermediate temperature through H2O and CO2 electrolysis with a Cu-based solid oxide electrolyzer cell
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DOI：
10.1016/j.ijhydene.2013.12.045
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发表时间：
2014-02
影响因子：
7.2
通讯作者：
C. Gaudillere;L. Navarrete;J. M. Serra
中科院分区：
文献类型：
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作者：
C. Gaudillere;L. Navarrete;J. M. Serra
固体氧化物电解槽（SOECs）是一种很有前途的电解H2O或CO2生产合成气（H2/CO）的能源装置。本文研制了Cu-Ce 0. 9 Gd 0. 1 O2 −δ/Ce 0. 8 Gd 0. 2 O2 −δ/Ba 0. 5Sr 0. 5Co 0. 8 Fe 0. 2 O3 −δ-Ce 0. 8 Gd 0. 2 O2 −δ电池，并在中温区（600°C-700 °C）进行了H2O和CO2电解实验。作为基准，电池首先在燃料电池操作模式下进行测试;样品在700 °C纯氢和空气下显示出104 mW cm− 2的最大功率密度峰值。H2O电解测试显示，在700 °C和−78 mA cm−2的电流密度下，氢气的稳定生产具有32%的法拉第效率。CO生产过程中观察到CO2电解，但需要更高的电池电压。在700 °C和−660 mA cm−2的电流密度下，获得了约4%的较低效率。这些结果证实，通过水和二氧化碳电解生产合成气是可行的，但需要从制造和电催化方面进一步改进以达到更高的产率和效率。
Solid Oxide Electrolyzer Cells (SOECs) are promising energy devices for the production of syngas (H2/CO) by H2O and/or CO2electrolysis. Here we developed a Cu–Ce0.9Gd0.1O2−δ/Ce0.8Gd0.2O2−δ/Ba0.5Sr0.5Co0.8Fe0.2O3−δ-Ce0.8Gd0.2O2−δcell and performed H2O and CO2electrolysis experiments in the intermediate temperature range (600°C–700 °C). As a baseline, the cell was first tested in fuel cell operation mode; the sample shows a maximum power density peak of 104 mW cm−2at 700 °C under pure hydrogen and air. H2O electrolysis testing revealed a steady production of hydrogen with a Faraday's efficiency of 32% at 700 °C at an imposed current density of −78 mA cm−2. CO production was observed during CO2electrolysis but higher cell voltages were required. A lower efficiency of about 4% was obtained at 700 °C at an imposed current density of −660 mA cm−2. These results confirm that syngas production is feasible by water and carbon dioxide electrolysis but further improvements from both the manufacturing and the electrocatalytic aspects are needed to reach higher yields and efficiencies.