An efficient and prospective self-assembled hybrid electrocatalyst for symmetrical and reversible solid oxide cells

Yang, YANG; Wu, Yujie; Bao, Hang; Song, Wenchao; Ni, Hao; Tian, Dong; Lin, Bin; Feng, Peizhong; Ling, Yihan

doi:10.1016/j.electacta.2020.137171

Cited by 27 publications

(11 citation statements)

References 44 publications

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“…43,44 Moreover, the Arrhenius plots of R p for the equivalent symmetrical cell with various R-PSCFM samples in the H 2 atmosphere at 550−700 °C are shown in Figure 6d Previous studies showed that the smaller the E a value, the better the catalytic activity of the material, which confirmed once again the catalytic activity sequence of R-PSCFM series materials. 45,46 In conclusion, R-PSCFM series materials exhibit different HOR catalytic activities, which are mainly caused by different oxygen vacancy concentrations on the surface of electrode materials. In addition, different R-PSCFM materials have different mean grain sizes and types of alloys as shown in Figures 2 and 3, which may further affect the HOR activity.…”

Section: Resultsmentioning

confidence: 94%

Electrochemical Performance of Pr_0.4Sr_0.5Co_xFe_0.9–xMo_0.1O_3−δ Oxides in a Reversible SOFC/SOEC System

Ping

Han

et al. 2022

Energy Fuels

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Changing the type and content of cation doping in perovskite oxide can improve its electrocatalytic performance in various environmental and energy devices. In this study, perovskite oxides Pr 0.4 Sr 0.5 Co x Fe 0.9−x Mo 0.1 O 3−δ (PSCFM, x = 0.1, 0.2, 0.45, and 0.7) are synthesized and act as semiconductors of singlecomponent fuel cells (SCFCs) and reversible single component cells (RSCCs). Under reducing conditions, the CoFe alloy nanoparticles are exsolved in situ and uniformly distributed on the perovskite surface. With the change of Co doping amount, the alloy types and particle sizes are varied. As the main place of electrochemical reaction, oxygen vacancy affects the catalytic activity of electrode materials. For the reduced PSCFM (R-PSCFM), the oxygen vacancy concentration decreases first and then increases with the increase in Co content. With a moderate Co doping level, Pr 0.4 Sr 0.5 Co 0.1 Fe 0.8 Mo 0.1 O 3−δ displays the best catalytic activity for hydrogen oxidation reaction (HOR) and Pr 0.4 Sr 0.5 Co 0.7 Fe 0.2 Mo 0.1 O 3−δ shows the best catalytic performance for oxygen reduction reaction (ORR). In addition, the rate-determining step (RDS) of HOR is a mixture of oxygen surface exchange and charge transfer reaction, and for ORR, the RDS is the reduction of oxygen atoms to O − . Furthermore, when the semiconductor material composition is Pr 0.4 Sr 0.5 Co 0.1 Fe 0.8 Mo 0.1 O 3−δ , the best performance characterized by high output power and electrolysis current density can be obtained under the SOFC/SOEC reversible operation.

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Section: Resultsmentioning

confidence: 94%

Electrochemical Performance of Pr_0.4Sr_0.5Co_xFe_0.9–xMo_0.1O_3−δ Oxides in a Reversible SOFC/SOEC System

Ping

Han

et al. 2022

Energy Fuels

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“…Counterintuitively, a stable performance was exhibited by the SOEC during the test, which might be attributed to decomposition products, such as PrBaFe 2 O 5+δ , Ba 6 Pr 2 Fe 4 O 15 and Co 3 Fe 7 , that possessing certain catalytic activity. At present, stability tests in related articles are generally limited to 1000 h, ,,, and thus the durability and degradation mechanisms of perovskite materials as hydrogen electrodes during long-term operation require further studied.…”

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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“…The synthesized processes were shown in our previous work in detail. 37,38 The primary powders of PBM and Bi-PBM were heat-treated at 950 °C for 3 h to form the disordered structure. In order to prepare the electrode slurry, PBM and Bi-PBM powders were mixed with solvent (10 wt% ethyl cellulose dissolved in terpinol) uniformly in a weight ratio of 1 : 2.…”

Section: Materials Synthesis and Cell Fabricationmentioning

confidence: 99%

A highly efficient bismuth substitution induced A-site ordered layered perovskite electrode for symmetrical solid oxide fuel cells

Yang

Chen²,

Li³

et al. 2023

J. Mater. Chem. A

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An efficient and prospective self-assembled hybrid electrocatalyst for symmetrical and reversible solid oxide cells

Cited by 27 publications

References 44 publications

Electrochemical Performance of Pr_0.4Sr_0.5Co_xFe_0.9–xMo_0.1O_3−δ Oxides in a Reversible SOFC/SOEC System

Electrochemical Performance of Pr_0.4Sr_0.5Co_xFe_0.9–xMo_0.1O_3−δ Oxides in a Reversible SOFC/SOEC System

Water Electrolysis toward Elevated Temperature: Advances, Challenges and Frontiers

A highly efficient bismuth substitution induced A-site ordered layered perovskite electrode for symmetrical solid oxide fuel cells

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An efficient and prospective self-assembled hybrid electrocatalyst for symmetrical and reversible solid oxide cells

Cited by 27 publications

References 44 publications

Electrochemical Performance of Pr0.4Sr0.5CoxFe0.9–xMo0.1O3−δ Oxides in a Reversible SOFC/SOEC System

Electrochemical Performance of Pr0.4Sr0.5CoxFe0.9–xMo0.1O3−δ Oxides in a Reversible SOFC/SOEC System

Water Electrolysis toward Elevated Temperature: Advances, Challenges and Frontiers

A highly efficient bismuth substitution induced A-site ordered layered perovskite electrode for symmetrical solid oxide fuel cells

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Product

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Electrochemical Performance of Pr_0.4Sr_0.5Co_xFe_0.9–xMo_0.1O_3−δ Oxides in a Reversible SOFC/SOEC System

Electrochemical Performance of Pr_0.4Sr_0.5Co_xFe_0.9–xMo_0.1O_3−δ Oxides in a Reversible SOFC/SOEC System