Enhanced CO_2 Electrolysis with Mn-doped SrFeO_(3-δ) Cathode

【Author】

HOU Shi-Sheng;XU Ze-Tong;ZHANG You-Kai;XIE Kui;GAN Li-Zhen;College of Transportation and Civil Engineering, Fujian Agriculture and Forestry University;Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences;

【Institution】

College of Transportation and Civil Engineering, Fujian Agriculture and Forestry University;Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences;

【Abstract】

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 CO_2 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 CO_2 indicates the presence of chemical intermediate state between CO_2 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 CO_2 electrolysis with no performance degradation being observed even after high-temperature operation of 100 hours.

【Keywords】

oxygen vacancy;;cathode;;carbon dioxide;;solid oxide electrolyser

References

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Total: 12 articles

  • [1] LI Zhe;YE Ling-Ting;XIE Kui;CAS Key Laboratory of Design and Assembly of Functional Nanostructures,and Fujian Provincial Key Laboratory of Nanomaterials,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences;, Perovskite Sr_(0.9)Fe_(0.9)Zr_(0.1)O_(3-δ):Redox-stable Structure,Oxygen Vacancy,Electrical Properties and Steam Electrolysis Performance, Chinese Journal of Structural Chemistry,
  • [2] Ethan S. Hecht;;Gaurav K. Gupta;;Huayang Zhu;;Anthony M. Dean;;Robert J. Kee;;Luba Maier;;Olaf Deutschmann, Methane reforming kinetics within a Ni–YSZ SOFC anode support, Applied Catalysis A, General,
  • [3] M. Schmidt;;S.J. Campbell, Crystal and Magnetic Structures of Sr 2 Fe 2 O 5 at Elevated Temperature, Journal of Solid State Chemistry,
  • [4] N. Laosiripojana;;S. Assabumrungrat, Catalytic steam reforming of methane, methanol, and ethanol over Ni/YSZ: The possible use of these fuels in internal reforming SOFC, Journal of Power Sources,

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