Intermediate Temperature CO 2 Electrolysis by Using La 0.9 Sr 0.1 Ga 0.8 Mg 0.2 O 3 Oxide Ion Conductor
Intermediate Temperature CO 2 Electrolysis by Using La 0.9 Sr 0.1 Ga 0.8 Mg 0.2 O 3 Oxide Ion Conductor
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DOI：
10.2355/isijinternational.55.381
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发表时间：
2015-02
影响因子：
1.8
通讯作者：
Shijing Wang;T. Ishihara
中科院分区：
文献类型：
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作者：
Shijing Wang;T. Ishihara
研究了采用 LaGaO3 基电解质在中间温度（即 973–1 173 K）下将 CO2 电解为 CO 的固体氧化物电解槽。对 Ni 中的各种金属添加剂进行了 CO2 还原阴极测试，发现添加 Fe 的 Ni 显示出高活性，并且在 Ni-Fe (9:1) 阴极上在 1.6 V 和 1 073 K 下实现了 1.5 A/cm 的电流密度。电解活性的提高可以通过扩大反应位点来解释，这可能归因于镍的细颗粒。此外，研究了添加剂对镍阴极的影响，发现通过向镍中添加铁可以大大提高电解电流。进一步研究了氧化物离子导体与Ni-Fe混合的影响，发现La0.6Sr0.4Fe0.9Mn0.1O3与Ni-Fe双金属混合对于在1.6 V和1 073 K下实现2.07 A/cm的CO2高电解电流最有效。
Solid oxide electrolysis cell for electrolysis of CO2 to CO was studied with the cell using LaGaO3-based electrolyte at the intermediate temperature (i.e. 973–1 173 K). Various metal additives to Ni were examined for cathode to CO2 reduction and it was fund that Ni added with Fe shows high activity and the current density of 1.5 A/cm was achieved at 1.6 V and 1 073 K on Ni–Fe (9:1) cathode. Improved electrolysis activity was explained by the expanded reaction site which may be assigned the fine particle of Ni. Furthermore, effects of additives to Ni cathode were studied and it was found that the electrolysis current could be much improved by addition of Fe to Ni. Effects of oxide ion conductor mixing with Ni–Fe were further studied and it was found that mixing La0.6Sr0.4Fe0.9Mn0.1O3 with Ni–Fe bimetal is the most effective for achieving high electrolysis current of CO2 of 2.07 A/cm at 1.6 V and 1 073 K.