A novel heterogeneous <scp>La0.8Sr0.2CoO3−δ/(La0.5Sr0.5)2CoO4+δ</scp> dual‐phase membrane for oxygen separation

Han, Ning; Wang, Wei; Zhang, Shuguang; Sunarso, Jaka; Zhu, Zhonghua; Liu, Shaomin

doi:10.1002/apj.2239

Cited by 11 publications

(3 citation statements)

References 39 publications

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“…After CO 2 treatment, the corresponding two peaks appear at 850.49 and 834.17 eV with Δ E 2 = 16.32 eV. As the magnitude of the multiplet splitting and intensity ratio of each multiplet‐split component are effective chemical diagnostics, Δ E 1 = 3.71 and 3.8 eV were calculated, revealing that La exists as trivalent oxide and not as hydroxide or carbonate . Furthermore, Ce as the adjacent element to La also shows higher basicity than other elements.…”

Section: Resultsmentioning

confidence: 99%

Highly Stable Dual‐Phase Membrane Based on Ce_0.9Gd_0.1O_2–δ—La₂NiO_4+δ for Oxygen Permeation under Pure CO₂ Atmosphere

et al. 2019

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Dense oxygen ion–conducting ceramic membranes with CO2 resistance can promote many advanced applications such as membrane reactors for green chemical synthesis and oxy‐fuel combustion for clean energy delivery. The state‐of‐the‐art perovskite oxide membranes are characterized by their high O2 flux but low stability in a CO2‐containing atmosphere. To solve this problem, dual‐phase membranes have captured the imagination of researchers. Herein, a novel dual‐phase hollow fiber membrane with a composition of 40 wt% Ce0.9Gd0.1O2–δ (GDC)–60 wt% La2NiO4+δ (LNO) is developed via a combined phase inversion sintering process. During the high temperature treatment, La‐doping behavior is observed with La leaching out from the LNO phase and diffusing into the GDC phase. This dual phase membrane displays the O2 flux of 1.47 at 950 °C, which is reduced by 10% to 1.31 mL min−1 cm−2 when the sweep gas is switched from helium to pure CO2. Such minor O2 flux reduction is due to the strong CO2 adsorption on membrane surface occupying the O2 vacancies without permanent membrane damage, which is fully eliminated by an inert gas purge. Such a robust dual‐phase membrane exhibits the potential to overcome the low stability problem under the CO2‐containing atmosphere.

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Section: Resultsmentioning

confidence: 99%

Highly Stable Dual‐Phase Membrane Based on Ce_0.9Gd_0.1O_2–δ—La₂NiO_4+δ for Oxygen Permeation under Pure CO₂ Atmosphere

et al. 2019

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“…These four processes all involve the electrochemical reactions of oxygen molecules. SOFC and SOEC are efficient energy conversion and storage systems that enable high-efficiency energy conversion, including electrochemical reactions where OER and ORR are important reactions [ 216 , 217 ]. SOFC reacts hydrogen (or other fuels) and oxygen to produce electricity, water, and heat, where oxygen is reduced to oxygen ions.…”

Section: Oxygen Electrocatalysis Related Applicationsmentioning

confidence: 99%

Designing Oxide Catalysts for Oxygen Electrocatalysis: Insights from Mechanism to Application

et al. 2023

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The electrochemical oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are fundamental processes in a range of energy conversion devices such as fuel cells and metal–air batteries. ORR and OER both have significant activation barriers, which severely limit the overall performance of energy conversion devices that utilize ORR/OER. Meanwhile, ORR is another very important electrochemical reaction involving oxygen that has been widely investigated. ORR occurs in aqueous solutions via two pathways: the direct 4-electron reduction or 2-electron reduction pathways from O2 to water (H2O) or from O2 to hydrogen peroxide (H2O2). Noble metal electrocatalysts are often used to catalyze OER and ORR, despite the fact that noble metal electrocatalysts have certain intrinsic limitations, such as low storage. Thus, it is urgent to develop more active and stable low-cost electrocatalysts, especially for severe environments (e.g., acidic media). Theoretically, an ideal oxygen electrocatalyst should provide adequate binding to oxygen species. Transition metals not belonging to the platinum group metal-based oxides are a low-cost substance that could give a d orbital for oxygen species binding. As a result, transition metal oxides are regarded as a substitute for typical precious metal oxygen electrocatalysts. However, the development of oxide catalysts for oxygen reduction and oxygen evolution reactions still faces significant challenges, e.g., catalytic activity, stability, cost, and reaction mechanism. We discuss the fundamental principles underlying the design of oxide catalysts, including the influence of crystal structure, and electronic structure on their performance. We also discuss the challenges associated with developing oxide catalysts and the potential strategies to overcome these challenges.

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“…Up to now, many studies have focused on the mechanism of perovskite oxide membrane for high-temperature gas separation in practical experiments; however, the research on the simulation of the gas separation process is still limited and inadequate. Since the investigation on the gas separation process would give rise to the insightful understanding of the internal mechanism through the transient data capture [39][40][41], it is urgent to develop and build rational computational simulation model of inorganic membrane materials towards gas separation process.…”

Section: Introductionmentioning

confidence: 99%

Insight into Steam Permeation through Perovskite Membrane via Transient Modeling

et al. 2020

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A dynamic model based on BaCe0.9Y0.1O3−δ (BCY10) perovskite membrane for steam permeation process is presented here to essentially investigate the internal mechanism. The transient concentration distribution and flux of the charged species and the electric potential distribution within the membrane on the steam permeation process are analyzed in detail via simulation based on this model. The results indicate that the flux of steam can be improved via elevating operating temperatures, enlarging the difference of the partial steam pressure between two sides of the membrane, increasing the membrane density, and reducing the membrane thickness. Moreover, it was found that the polarization electric potential between both sides of the membrane occurs during the steam permeation process, especially at the steady state of the steam permeation process. The polarization electric potential reaches the maximum value at about 1050 K in this membrane. The evolution of electric potential can explain the influence of the above-mentioned factors on the steam permeation process. This study advances the mechanism of steam permeation through perovskite membrane, which provides a new strategy for the fundamental investigation of related species permeation (oxygen, carbon dioxide, hydrogen, etc.) on inorganic membranes via transient modeling.

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A novel heterogeneous La_0.8Sr_0.2CoO_3−δ/(La_0.5Sr_0.5)₂CoO_4+δ dual‐phase membrane for oxygen separation

Cited by 11 publications

References 39 publications

Highly Stable Dual‐Phase Membrane Based on Ce_0.9Gd_0.1O_2–δ—La₂NiO_4+δ for Oxygen Permeation under Pure CO₂ Atmosphere

Highly Stable Dual‐Phase Membrane Based on Ce_0.9Gd_0.1O_2–δ—La₂NiO_4+δ for Oxygen Permeation under Pure CO₂ Atmosphere

Designing Oxide Catalysts for Oxygen Electrocatalysis: Insights from Mechanism to Application

Insight into Steam Permeation through Perovskite Membrane via Transient Modeling

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A novel heterogeneous La0.8Sr0.2CoO3−δ/(La0.5Sr0.5)2CoO4+δ dual‐phase membrane for oxygen separation

Cited by 11 publications

References 39 publications

Highly Stable Dual‐Phase Membrane Based on Ce0.9Gd0.1O2–δ—La2NiO4+δ for Oxygen Permeation under Pure CO2 Atmosphere

Highly Stable Dual‐Phase Membrane Based on Ce0.9Gd0.1O2–δ—La2NiO4+δ for Oxygen Permeation under Pure CO2 Atmosphere

Designing Oxide Catalysts for Oxygen Electrocatalysis: Insights from Mechanism to Application

Insight into Steam Permeation through Perovskite Membrane via Transient Modeling

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A novel heterogeneous La_0.8Sr_0.2CoO_3−δ/(La_0.5Sr_0.5)₂CoO_4+δ dual‐phase membrane for oxygen separation

Highly Stable Dual‐Phase Membrane Based on Ce_0.9Gd_0.1O_2–δ—La₂NiO_4+δ for Oxygen Permeation under Pure CO₂ Atmosphere

Highly Stable Dual‐Phase Membrane Based on Ce_0.9Gd_0.1O_2–δ—La₂NiO_4+δ for Oxygen Permeation under Pure CO₂ Atmosphere