α-PbO2-type niobate as efficient cathode materials for steam and CO2 electrolysis

Ruan, Wenji; Yue, Xiangling; Ni, Jiupai; Xie, Deti; Ni, Chengsheng

doi:10.1016/j.jpowsour.2020.229234

Cited by 11 publications

(11 citation statements)

References 58 publications

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“…The analysis of distribution of relaxation times (DRT) for the impedance spectra was presented with a regularization parameter of 10 –3 using the DRT tool . The actual hydrogen concentration in the effluent was monitored using a gas chromatograph (Perkin Elmer, USA) with a thermal conducting detector for the calculation of Faraday efficiency …”

Section: Methodsmentioning

confidence: 63%

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Cobalt-Doped MnFeCrO₄ Spinel as the Fuel Electrode for Solid Oxide Electrolysis Cells

Zhang,

Ni,

2023

Energy Fuels

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Solid oxide electrolysis cells (SOECs) are devices that convert electrical energy into chemical energy and are widely used for hydrogen production from steam or CO generation from CO 2 . Spinel-type oxides are commonly used as a coating on metal interconnects because of their high electrical conductivity (σ) in the air and matching thermal expansion with that of the electrolyte. They have been used as oxygen electrodes in solid oxide cells in recent years, but their application in fuel electrodes was less studied. In this research, MnFeCr 1−x Co x O 4 (x = 0, 0.05, 0.2) spinel oxides with a σ around 0.1 S cm −1 were used as the fuel electrode of an SOEC. The MnFeCr 0.95 Co 0.05 O 4 (MFCC5) and MnFeCr 0.8 Co 0.2 O 4 (MFCC20) with Co doping on the Cr site decomposed partially during the water electrolysis, producing CoFe alloy and MnO particles on the parent spinels, forming a metal/oxide interface that further enhanced the electrocatalytic performance and durability of the cell. MFCC5 was able to achieve a current density of 1550 mA cm −2 at 1.6 V and maintained a current density of about 600 mA cm −2 after the 150 h durability test at 1.3 V at 800 °C. The Faraday efficiency was close to unity. The in situ exsolution process driven by the cathodic current significantly changed the performance of the cell, but a high performance was still maintained. In situ exsolution of the metals from the reducible cations was a feasible way of designing the spinel-type cathode for SOECs.

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Section: Methodsmentioning

confidence: 63%

“…21 The actual hydrogen concentration in the effluent was monitored using a gas chromatograph (Perkin Elmer, USA) with a thermal conducting detector for the calculation of Faraday efficiency. 20…”

Section: Fabrication and Testing Of Electrolysis Cellsmentioning

confidence: 99%

Cobalt-Doped MnFeCrO₄ Spinel as the Fuel Electrode for Solid Oxide Electrolysis Cells

Zhang,

Ni,

2023

Energy Fuels

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“…The specific reason is that the formation of oxide ion vacancies and the formation of oxide ion transport pathways induced by low valent Fe can improve the performance. 38,39 However, when Fe completely replaces Cr, a small fraction of Fe 2+ will be oxidized to Fe 4+ , which corresponds to the satellite peak at an E B of B713 eV. Furthermore, since Fe 4+ is extremely easy to lose electrons, Fe 5+ may also be present.…”

Section: Resultsmentioning

confidence: 99%

Enhanced CO₂electrolysis through modulation of oxygen vacancies

Huang

Yang

et al. 2023

New J. Chem.

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“…The reactivity of ferrite with the popular zirconia normally needs to be addressed by the blocking layer to inhibit the unexpected reaction, while the interfacial stability at the LSGM/ferrite perovskite needs to be monitored in longer times. The development of ferrite electrocatalysts was confined mainly on perovskites, and the development of other types of oxides was demanded to reduce the use of costly rare earth elements or mobile alkaline earth elements 324…”

Section: Discussionmentioning

confidence: 99%

Iron-based electrode materials for solid oxide fuel cells and electrolysers

Zhou

Zhang

et al. 2021

Energy Environ. Sci.

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α-PbO2-type niobate as efficient cathode materials for steam and CO2 electrolysis

Cited by 11 publications

References 58 publications

Cobalt-Doped MnFeCrO₄ Spinel as the Fuel Electrode for Solid Oxide Electrolysis Cells

Cobalt-Doped MnFeCrO₄ Spinel as the Fuel Electrode for Solid Oxide Electrolysis Cells

Enhanced CO₂electrolysis through modulation of oxygen vacancies

Iron-based electrode materials for solid oxide fuel cells and electrolysers

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α-PbO2-type niobate as efficient cathode materials for steam and CO2 electrolysis

Cited by 11 publications

References 58 publications

Cobalt-Doped MnFeCrO4 Spinel as the Fuel Electrode for Solid Oxide Electrolysis Cells

Cobalt-Doped MnFeCrO4 Spinel as the Fuel Electrode for Solid Oxide Electrolysis Cells

Enhanced CO2electrolysis through modulation of oxygen vacancies

Iron-based electrode materials for solid oxide fuel cells and electrolysers

Contact Info

Product

Resources

About

Cobalt-Doped MnFeCrO₄ Spinel as the Fuel Electrode for Solid Oxide Electrolysis Cells

Cobalt-Doped MnFeCrO₄ Spinel as the Fuel Electrode for Solid Oxide Electrolysis Cells

Enhanced CO₂electrolysis through modulation of oxygen vacancies