Jump to main content
Jump to site search

Issue 28, 2018
Previous Article Next Article

Pure CO2 electrolysis over an Ni/YSZ cathode in a solid oxide electrolysis cell

Author affiliations

Abstract

Traditional nickel/yttria stabilized zirconia (Ni/YSZ) electrodes have been widely used as the cathode in a solid oxide electrolysis cell due to its high performance. However, Ni/YSZ cathodes are usually considered to be easily oxidized during pure CO2 electrolysis at high temperature, so a reductive gas such as H2 or CO is mixed with pure CO2 to protect the Ni/YSZ cathode from being oxidized. The real necessity of a reductive gas has not been systematically confirmed yet. Herein, stable pure CO2 electrolysis over the Ni/YSZ cathode is achieved at 1.5 V and 700 °C for 60 hours without any reductive gas. In situ electroreduction of the nickel oxide/yttria stabilized zirconia electrode and theoretical calculations suggest that the electrolysis voltage provides continuous electrons across the Ni/YSZ cathode and diminishes Ni oxidation in pure CO2 electrolysis. In addition, the electrochemical performance of CO2 electrolysis over the Ni/YSZ cathode without a reductive gas is verified to be higher than that with a reductive gas. Therefore, pure CO2 electrolysis over the Ni/YSZ cathode not only operates stably, but also possesses high electrochemical performance.

Graphical abstract: Pure CO2 electrolysis over an Ni/YSZ cathode in a solid oxide electrolysis cell

Back to tab navigation

Supplementary files

Publication details

The article was received on 28 Mar 2018, accepted on 19 Jun 2018 and first published on 19 Jun 2018


Article type: Paper
DOI: 10.1039/C8TA02858C
Citation: J. Mater. Chem. A, 2018,6, 13661-13667

  •   Request permissions

    Pure CO2 electrolysis over an Ni/YSZ cathode in a solid oxide electrolysis cell

    Y. Song, Z. Zhou, X. Zhang, Y. Zhou, H. Gong, H. Lv, Q. Liu, G. Wang and X. Bao, J. Mater. Chem. A, 2018, 6, 13661
    DOI: 10.1039/C8TA02858C

Search articles by author

Spotlight

Advertisements