A vanadium-doped BSCF perovskite for CO2 electrolysis in solid oxide electrolysis cells

Liu, Qingxue; Song, Yibing; Li, Rongtan; Lv, Houfu; Feng, Wenjie; Shen, Yuxiang; Zhang, Xiaomin; Wang, Qianqian; Bao, Xinhe

doi:10.1016/j.ijhydene.2021.03.134

Cited by 26 publications

(11 citation statements)

References 38 publications

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“…The spectra of the O element comprise three fitted peaks, namely, O1, O2, and O3. These peaks represent lattice oxygen (O1), chemically adsorbed oxygen on oxygen vacancies (O2), and physically adsorbed oxygen on surfaces (O3), respectively . By evaluation of the relative area of these peaks, the relative content of active oxygen from the three aforementioned types can be determined.…”

Section: Resultsmentioning

confidence: 99%

“…These peaks represent lattice oxygen (O1), chemically adsorbed oxygen on oxygen vacancies (O2), and physically adsorbed oxygen on surfaces (O3), respectively. 28 By evaluation of the relative area of these peaks, the relative content of active oxygen from the three aforementioned types can be determined. As shown in Table . 1, the O2/O1 ratio of BL95CFN (3.85) is significantly higher than that of BL100CFN (2.645).…”

Section: Analysis Of Structuresmentioning

confidence: 99%

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A-Site Deficiency Ba_0.9La_0.1Co_0.7Fe_0.2Nb_0.1O_3-δ Perovskite as Highly Active and Durable Oxygen Electrode for High-Temperature H₂O Electrolysis

Song,

Tang,

Wang

et al. 2023

Energy Fuels

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The solid oxide electrolysis cell (SOEC) as an efficient and environmentally friendly energy conversion device can electrolyze steam efficiently and convert electricity into chemical energy. However, the lack of an efficient and stable oxygen electrode hinders the practical application of steam electrolysis in SOECs. In this paper, A-site deficiencies were incorporated into a Ba0.9La0.1Co0.7Fe0.2Nb0.1O3‑δ (BL95CFN) perovskite oxygen electrode. It has been confirmed that the introduction of an A-site deficiency effectively improves the concentration of oxygen vacancies, which promotes the surface exchange of oxygen and accelerates the oxygen reduction reaction. In addition, after introducing the deficiency, the polarization impedance (R p) of the BL95CFN oxygen electrode decreased from 0.162 to 0.087 Ω cm2 at 800 °C. Furthermore, under a 50% H2O atmosphere at 800 °C, the current density of BL95CFN reached 1.860 A cm–2 when the voltage reached 1.75 V, much higher than that of BL100CFN (1.428 A cm–2). Moreover, the A-site deficient BL95CFN demonstrated excellent performance in both short- and long-term stability, making it a promising candidate for application as a solid oxide electrolysis cell (SOEC) oxygen electrode material.

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Section: Resultsmentioning

confidence: 99%

Section: Analysis Of Structuresmentioning

confidence: 99%

A-Site Deficiency Ba_0.9La_0.1Co_0.7Fe_0.2Nb_0.1O_3-δ Perovskite as Highly Active and Durable Oxygen Electrode for High-Temperature H₂O Electrolysis

Song,

Tang,

Wang

et al. 2023

Energy Fuels

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“…Among numerous perovskites including La 1– x Sr x MnO 3+δ (LSM), LSCF, La 0.6 Sr 0.4 CoO 3‑δ (LSC), La 0.8 Sr 0.2 Co 0.8 Ni 0.2 O 3‑δ (LSCN), La 0.6 Ca 0.4 Fe 0.8 Ni 0.2 O 3‑δ (LCaFN), Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3‑δ (BSCF) and Pr 0.5 Ba 0.5 Co 0.7 Fe 0.25 Nb 0.05 O 3‑δ (PBCFN), LSM and LSCF are the most employed oxygen electrode materials. Although LSM has an acceptable catalytic activity, excellent thermodynamic stability and compatibility with YSZ, a pure electronic conducting nature and an extremely low ionic conductivity restrict the electrochemical reactions on its electrode–electrolyte interface, confirmed by the obviously higher polarization resistance of 8.2 Ω·cm 2 for a SOEC utilizing a bare LSM electrode at 800 °C .…”

Section: Solid Oxide Electrolysis Cells (Soecs)mentioning

confidence: 99%

Water Electrolysis toward Elevated Temperature: Advances, Challenges and Frontiers

et al. 2023

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Since severe global warming and related climate issues have been caused by the extensive utilization of fossil fuels, the vigorous development of renewable resources is needed, and transformation into stable chemical energy is required to overcome the detriment of their fluctuations as energy sources. As an environmentally friendly and efficient energy carrier, hydrogen can be employed in various industries and produced directly by renewable energy (called green hydrogen). Nevertheless, large-scale green hydrogen production by water electrolysis is prohibited by its uncompetitive cost caused by a high specific energy demand and electricity expenses, which can be overcome by enhancing the corresponding thermodynamics and kinetics at elevated working temperatures. In the present review, the effects of temperature variation are primarily introduced from the perspective of electrolysis cells. Following an increasing order of working temperature, multidimensional evaluations considering materials and structures, performance, degradation mechanisms and mitigation strategies as well as electrolysis in stacks and systems are presented based on elevated temperature alkaline electrolysis cells and polymer electrolyte membrane electrolysis cells (ET-AECs and ET-PEMECs), elevated temperature ionic conductors (ET-ICs), protonic ceramic electrolysis cells (PCECs) and solid oxide electrolysis cells (SOECs).

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“…Recently, mixed ionic and electronic conductors, such as perovskite oxides (ABO 3 ), have been used as alternative cathode materials because of their good redox stability and high carbon deposition resistance; however, they show inferior CO 2 electrolysis performance compared with the Ni/YSZ cathode. The performance of perovskite oxides has been improved by element doping [92][93][94][95][96], anchoring single-metal sites on the surface [97], constructing catalytically active oxide-oxide interfaces via infiltration [98,99] and metal-oxide interfaces via metal decoration [100], and in situ exsolution of metal NPs [101][102][103][104]. The in situ exsolution treatment can produce many metal-alloy NPs (e.g., Rh, Pd, Pt, Fe, Ni, Co, FeNi, CoFe, and RuFe) on perovskite surfaces under reducing environments; however, the number of NPs is low because of the sluggish diffusion of B-site dopant cations in the bulk perovskite.…”

Section: High-temperature Co 2 Electrolysis To Co and Syngasmentioning

confidence: 99%

Heterogeneous Catalysis for CO2 Conversion into Chemicals and Fuels

Gao

Wang

et al. 2022

Trans. Tianjin Univ.

Self Cite

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Catalytic conversion of CO2 into chemicals and fuels is a viable method to reduce carbon emissions and achieve carbon neutrality. Through thermal catalysis, electrocatalysis, and photo(electro)catalysis, CO2 can be converted into a wide range of valuable products, including CO, formic acid, methanol, methane, ethanol, acetic acid, propanol, light olefins, aromatics, and gasoline, as well as fine chemicals. In this mini-review, we summarize the recent progress in heterogeneous catalysis for CO2 conversion into chemicals and fuels and highlight some representative studies of different conversion routes. The structure–performance correlations of typical catalytic materials used for the CO2 conversion reactions have been revealed by combining advanced in situ/operando spectroscopy and microscopy characterizations and density functional theory calculations. Catalytic selectivity toward a single CO2 reduction product/fraction should be further improved at an industrially relevant CO2 conversion rate with considerable stability in the future. Graphical Abstract

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A vanadium-doped BSCF perovskite for CO2 electrolysis in solid oxide electrolysis cells

Cited by 26 publications

References 38 publications

A-Site Deficiency Ba_0.9La_0.1Co_0.7Fe_0.2Nb_0.1O_3-δ Perovskite as Highly Active and Durable Oxygen Electrode for High-Temperature H₂O Electrolysis

A-Site Deficiency Ba_0.9La_0.1Co_0.7Fe_0.2Nb_0.1O_3-δ Perovskite as Highly Active and Durable Oxygen Electrode for High-Temperature H₂O Electrolysis

Water Electrolysis toward Elevated Temperature: Advances, Challenges and Frontiers

Heterogeneous Catalysis for CO2 Conversion into Chemicals and Fuels

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A vanadium-doped BSCF perovskite for CO2 electrolysis in solid oxide electrolysis cells

Cited by 26 publications

References 38 publications

A-Site Deficiency Ba0.9La0.1Co0.7Fe0.2Nb0.1O3-δ Perovskite as Highly Active and Durable Oxygen Electrode for High-Temperature H2O Electrolysis

A-Site Deficiency Ba0.9La0.1Co0.7Fe0.2Nb0.1O3-δ Perovskite as Highly Active and Durable Oxygen Electrode for High-Temperature H2O Electrolysis

Water Electrolysis toward Elevated Temperature: Advances, Challenges and Frontiers

Heterogeneous Catalysis for CO2 Conversion into Chemicals and Fuels

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A-Site Deficiency Ba_0.9La_0.1Co_0.7Fe_0.2Nb_0.1O_3-δ Perovskite as Highly Active and Durable Oxygen Electrode for High-Temperature H₂O Electrolysis

A-Site Deficiency Ba_0.9La_0.1Co_0.7Fe_0.2Nb_0.1O_3-δ Perovskite as Highly Active and Durable Oxygen Electrode for High-Temperature H₂O Electrolysis