New Insight into the Doped Strontium Titanate Cathode with In Situ Exsolved Nickel Nanoparticles for Electrolysis of Carbon Dioxide
New Insight into the Doped Strontium Titanate Cathode with In Situ Exsolved Nickel Nanoparticles for Electrolysis of Carbon Dioxide
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DOI：
10.1002/admi.202001598
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发表时间：
2020-12-06
影响因子：
5.4
通讯作者：
Li, Baoguang
中科院分区：
文献类型：
--
作者：
Bai, Lu;Li, Haibin;Li, Baoguang
避免CO2污染的一种方法是通过固体氧化物电解槽将其转化为CO，其中可以使用掺杂的SrTiO3作为阴极材料。研究发现，在掺杂SrTiO3阴极中原位溶出的Ni纳米颗粒可以进一步提高电解性能。在这项工作中，研究了具有原位溶解的Ni颗粒的(La0.2Sr0.8)(0.85)Ti0.8Cr0.1Ni0.1O3-δ阴极。提出的新模型解释了溶出过程对晶体结构的影响。根据热重分析，估计约 13.6% 至 37.4% 的 Ni 原子从原始阴极中溶出。使用含有Ni纳米粒子的新型阴极，电解CO的产率提高了约50%，电流效率提高了约10%。
One way to avoid CO2 pollution is changing it into CO by solid oxide electrolyzers, in which doped SrTiO3 can be used as cathode materials. It is found that in situ exsolved Ni nanoparticles in doped SrTiO3 cathode can further improve the electrolysis performance. In this work, (La0.2Sr0.8)(0.85)Ti0.8Cr0.1Ni0.1O3-delta cathode with in situ exsolved Ni particles is investigated. A new model proposed explains the influence of exsolution process on crystal structure. Based on thermogravimetric analysis, it is estimated that about 13.6% to 37.4% Ni atoms exsolve out of original cathode. With the new cathode containing Ni nanoparticles, the yield of CO from electrolysis is improved at about 50% and the current efficiency is increased at about 10%.