Citation: Shi-Sheng HOU, Ze-Tong XU, You-Kai ZHANG, Kui XIE, Li-Zhen GAN. Enhanced CO₂ Electrolysis with Mn-doped SrFeO_3-δ Cathode[J]. Chinese Journal of Structural Chemistry, ;2020, 39(9): 1662-1668. doi: 10.14102/j.cnki.0254-5861.2011-2672 shu

Enhanced CO₂ Electrolysis with Mn-doped SrFeO_3-δ Cathode

Shi-Sheng HOU ^{a, b} ,
Ze-Tong XU ^b ,
You-Kai ZHANG ^{a, b} ,
Kui XIE ^b ,
Li-Zhen GAN ^{a, b,,}

a.
College of Transportation and Civil Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, China
b.
Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China

Corresponding author: Li-Zhen GAN, lzgan@fafu.edu.cn
Received Date: 20 November 2019
Accepted Date: 8 February 2020

Fund Project: the National Natural Science Foundation of China 21902025the National Natural Science Foundation of China 91845202the National Natural Science Foundation of China 21750110433Innovative Project of the Education Department of Fujian Province JAT170174Natural Science Foundation of Fujian Province 2018J05012Dalian National Laboratory for Clean Energy DNL180404Strategic Priority Research Program of Chinese Academy of Sciences XDB2000000

Figures(6)

Solid oxide carbon dioxide electrolysers are expected to play a key role in carbon-neutral energy landscape. However, the limited activity of traditional ceramic cathodes still restricts the electrochemical performance. Here we report the doping of Mn at the B site of SrFeO_3-δ cathode to improve CO₂ electrolysis. The oxygen vacancy concentration is increased by ~30% with Mn doping while the surface oxygen exchange coefficients are enhanced by ~10 times. The chemisorption of CO₂ indicates the presence of chemical intermediate state between CO₂ molecule and carbonate ion on the oxygen-deficient cathode surface which therefore leads to the desorption temperature of ~800 ℃. The Mn-doped SrFeO_3-δ enhances CO₂ electrolysis with no performance degradation being observed even after high-temperature operation of 100 hours.
- oxygen vacancy,
- cathode,
- carbon dioxide,
- solid oxide electrolyser
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Enhanced CO2 Electrolysis with Mn-doped SrFeO3-δ Cathode

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Enhanced CO₂ Electrolysis with Mn-doped SrFeO_3-δ Cathode