Layered perovskites with exsolved Co-Fe nanoalloy as highly active and stable anodes for direct carbon solid oxide fuel cells

Xiangjun Chen; Jinshuo Qiao; Zhenhua Wang; Wang Sun; Kening Sun

doi:10.1016/j.jallcom.2023.168872

Layered perovskites with exsolved Co-Fe nanoalloy as highly active and stable anodes for direct carbon solid oxide fuel cells

Xiangjun Chen, Jinshuo Qiao^*, Zhenhua Wang, Wang Sun, Kening Sun

^*Corresponding author for this work

School of Chemistry and Chemical Engineering

Beijing Institute of Technology

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

The performance and stability of direct carbon solid oxide fuel cells (DCSOFCs) are severely affected by the electrocatalytic activity of their anode materials. In this work, a cobalt doped layered perovskite, (PrBa)_0.95Fe_1.8−xCo_xNb_0.2O_5+δ (PBFCo_xN, x = 0, 0.1, 0.2, 0.3), is investigated as the anode material for a DCSOFC. Co₃Fe₇ alloy particles are exsolved on the perovskite substrate under the reduction of carbon, which improves CO chemisorption and electrochemical oxidation. This enhances the electrochemical performance of the anode. The electrolyte-supported cell with a (PrBa)_0.95Fe_1.6Co_0.2Nb_0.2O_5+δ (PBFCo_0.2N) anode achieves a peak power density of 525.6 mW cm⁻² at 800 °C, fueled by activated carbon. The performance of this anode material is comparable to or exceeds that of previously reported anodes, indicating that the PBFCo_0.2N anode is a promising option for DCSOFCs.

Original language	English
Article number	168872
Journal	Journal of Alloys and Compounds
Volume	940
DOIs	https://doi.org/10.1016/j.jallcom.2023.168872
Publication status	Published - 15 Apr 2023

Keywords

Anode
Chemisorption
Direct carbon solid oxide fuel cell
Layered perovskite

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10.1016/j.jallcom.2023.168872

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title = "Layered perovskites with exsolved Co-Fe nanoalloy as highly active and stable anodes for direct carbon solid oxide fuel cells",

abstract = "The performance and stability of direct carbon solid oxide fuel cells (DCSOFCs) are severely affected by the electrocatalytic activity of their anode materials. In this work, a cobalt doped layered perovskite, (PrBa)0.95Fe1.8−xCoxNb0.2O5+δ (PBFCoxN, x = 0, 0.1, 0.2, 0.3), is investigated as the anode material for a DCSOFC. Co3Fe7 alloy particles are exsolved on the perovskite substrate under the reduction of carbon, which improves CO chemisorption and electrochemical oxidation. This enhances the electrochemical performance of the anode. The electrolyte-supported cell with a (PrBa)0.95Fe1.6Co0.2Nb0.2O5+δ (PBFCo0.2N) anode achieves a peak power density of 525.6 mW cm−2 at 800 °C, fueled by activated carbon. The performance of this anode material is comparable to or exceeds that of previously reported anodes, indicating that the PBFCo0.2N anode is a promising option for DCSOFCs.",

keywords = "Anode, Chemisorption, Direct carbon solid oxide fuel cell, Layered perovskite",

author = "Xiangjun Chen and Jinshuo Qiao and Zhenhua Wang and Wang Sun and Kening Sun",

note = "Publisher Copyright: {\textcopyright} 2023 Elsevier B.V.",

year = "2023",

month = apr,

day = "15",

doi = "10.1016/j.jallcom.2023.168872",

language = "English",

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T1 - Layered perovskites with exsolved Co-Fe nanoalloy as highly active and stable anodes for direct carbon solid oxide fuel cells

AU - Chen, Xiangjun

AU - Qiao, Jinshuo

AU - Wang, Zhenhua

AU - Sun, Wang

AU - Sun, Kening

PY - 2023/4/15

Y1 - 2023/4/15

N2 - The performance and stability of direct carbon solid oxide fuel cells (DCSOFCs) are severely affected by the electrocatalytic activity of their anode materials. In this work, a cobalt doped layered perovskite, (PrBa)0.95Fe1.8−xCoxNb0.2O5+δ (PBFCoxN, x = 0, 0.1, 0.2, 0.3), is investigated as the anode material for a DCSOFC. Co3Fe7 alloy particles are exsolved on the perovskite substrate under the reduction of carbon, which improves CO chemisorption and electrochemical oxidation. This enhances the electrochemical performance of the anode. The electrolyte-supported cell with a (PrBa)0.95Fe1.6Co0.2Nb0.2O5+δ (PBFCo0.2N) anode achieves a peak power density of 525.6 mW cm−2 at 800 °C, fueled by activated carbon. The performance of this anode material is comparable to or exceeds that of previously reported anodes, indicating that the PBFCo0.2N anode is a promising option for DCSOFCs.

AB - The performance and stability of direct carbon solid oxide fuel cells (DCSOFCs) are severely affected by the electrocatalytic activity of their anode materials. In this work, a cobalt doped layered perovskite, (PrBa)0.95Fe1.8−xCoxNb0.2O5+δ (PBFCoxN, x = 0, 0.1, 0.2, 0.3), is investigated as the anode material for a DCSOFC. Co3Fe7 alloy particles are exsolved on the perovskite substrate under the reduction of carbon, which improves CO chemisorption and electrochemical oxidation. This enhances the electrochemical performance of the anode. The electrolyte-supported cell with a (PrBa)0.95Fe1.6Co0.2Nb0.2O5+δ (PBFCo0.2N) anode achieves a peak power density of 525.6 mW cm−2 at 800 °C, fueled by activated carbon. The performance of this anode material is comparable to or exceeds that of previously reported anodes, indicating that the PBFCo0.2N anode is a promising option for DCSOFCs.

KW - Anode

KW - Chemisorption

KW - Direct carbon solid oxide fuel cell

KW - Layered perovskite

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DO - 10.1016/j.jallcom.2023.168872

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JF - Journal of Alloys and Compounds

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ER -

Layered perovskites with exsolved Co-Fe nanoalloy as highly active and stable anodes for direct carbon solid oxide fuel cells

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Keywords

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