Temperature dependency of activity of nano-catalysts on La0.6Sr0.4Co0.2Fe0.8O3−δ cathode of solid oxide fuel cells

Soltanizade, Ali; Babaei, Alireza; Ataie, A.; Seyed-Vakili, Seyed Vahidreza

doi:10.1007/s10800-019-01355-6

Cited by 18 publications

(8 citation statements)

References 33 publications

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“…Moreover, multivalent cations with charge dissimilation provide more chemisorption sites for O 2 adsorption. 15 The Co 2p 3/2 (Figure S6) can be divided into two pairs of peaks, corresponding to Co 2+ (780.2 eV) and Co 3+ (782.5 eV) of sp-PSFC. After self-assembly, the appearance of spinel breaks the charge balance and increases the Co 2+ content of the overall composite (Figure 2g), which indicates that the construction of a heterogeneous interface leads to electronic reconstruction on the surface.…”

Section: During Chemical Recombination Strong Interfacial Interactionsmentioning

confidence: 99%

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In Situ Self-Reconstructed Nanoheterostructure Catalysts for Promoting Oxygen Reduction Reaction

Wang

Ren

et al. 2022

ACS Energy Lett.

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Constructing heterostructures to obtain catalysts with high electrocatalytic activity is an essential but challenging research direction. Herein, a new composite catalyst, modified with nanospinel on the perovskite skeleton, Pr0.4Sr0.6Co0.2Fe0.8O3-δ-(Co x Fe1–x )3O4 (sp-PSFC), is obtained using intelligent in situ compounding. Irreversibly exsolved nanoparticles are uniformly embedded on the surface of Pr0.4Sr0.6Co0.2Fe0.8O3 (PSFC) in the form of a nonshell layer to produce a nanoscale heterojunction. The structure of PSFC is fine-tuned through the exsolution of nanoparticles, resulting in B-site ion vacancies and oxygen vacancies, which promote the adsorption and migration of oxygen species. The construction of a heterointerface effectively reduces the oxygen adsorption energy of the cathode, leading to the formation of multiple reaction paths for the migration of oxygen species. This method of constructing a heterointerface by in situ irreversible exsolution overcomes the deficiency of single-phase reaction kinetics and provides a strategy for optimizing catalyst activity.

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Section: During Chemical Recombination Strong Interfacial Interactionsmentioning

confidence: 99%

“…The unrecovered valence state is due to the escape of lattice oxygen caused by the absence of B-site. Moreover, multivalent cations with charge dissimilation provide more chemisorption sites for O 2 adsorption . The Co 2p 3/2 (Figure S6) can be divided into two pairs of peaks, corresponding to Co 2+ (780.2 eV) and Co 3+ (782.5 eV) of sp-PSFC.…”

mentioning

confidence: 99%

In Situ Self-Reconstructed Nanoheterostructure Catalysts for Promoting Oxygen Reduction Reaction

Wang

Ren

et al. 2022

ACS Energy Lett.

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“…The increasing global demand for energy, coupled with the significant environmental consequences associated with traditional energy resources, has propelled the pursuit of sustainable and diverse energy sources [1][2][3][4][5][6][7][8][9][10]. A prominent focus in this undertaking revolves around augmenting the efficiency of energy conversion devices, particularly solid oxide fuel cells (SOFCs) [2,[11][12][13][14] and batteries [15][16][17]. SOFCs, distinguished for their exceptional energy conversion capabilities, generate electricity through electrochemical reactions involving gaseous fuels [12,[18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Unveiling the Promoted LSTM/YSZ Composite Anode for Direct Utilization of Hydrocarbon Fuels

2023

International Journal of Science and Engineering Applications

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The global quest for sustainable and diversified energy sources due to increased demand and environmental concerns has placed considerable emphasis on optimizing the efficiency of energy conversion devices. Solid oxide fuel cells (SOFCs) are known for their superior energy conversion capabilities utilizing hydrocarbons directly. Conventional SOFC anodes, typically composed of Ni/YSZ cermet, have drawbacks, such as susceptibility to coking and sulfur poisoning when using hydrocarbon fuels. Mixed ionic and electronic conductive (MIEC) materials, including La 0.4 Sr 0.6 Ti 1-x Mn x O 3 , have gained attention for their resistance to carbon and sulfurrelated problems, as well as their thermal and redox stability. This study explores the electro-oxidation of methanol on a composite anode made of La 0.4 Sr 0.6 Ti 0.6 Mn 0.4 O 3-δ and yttria-stabilized zirconia. To enhance the electrode's performance, LaFe 0.6 Co 0.4 O 3 solutions, with various concentrations, are impregnated into the composite anode. Impedance spectroscopy measurements reveal improved performance, especially with the inclusion of ethylene glycol (EG), demonstrating lower electrode polarization resistance and enhanced catalytic activity. The X-ray diffraction analysis confirms the formation of LFC perovskite phases within the porous structure of the composite anode. The results indicate that the impregnation of LSTM/YSZ composite anodes with LFC solutions, particularly those with EG, enhances the methanol electro-oxidation reaction, making this composite a promising candidate for highperformance SOFC anodes. This research paves the way for more efficient and stable SOFCs, contributing to the sustainable energy landscape.

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“…The escalating global demand for energy, coupled with the considerable environmental repercussions associated with conventional energy sources, has stimulated the exploration of sustainable and diverse energy alternatives [1][2][3][4][5][6][7][8][9]. A central focus of this endeavor centers on enhancing the efficiency of energy conversion devices, specifically emphasizing solid oxide fuel cells (SOFCs) [10][11][12][13][14][15][16][17][18] and batteries [19][20][21]. SOFCs, recognized as highly efficient energy conversion devices, generate electricity through the electrochemical reaction of gaseous fuels, with hydrogen and its carriers serving as the primary fuel sources [22][23][24][25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Optimizing methane direct utilization: The advanced Sr2CoMoO6-δ anode

Seyed Mostafa Nasrollahpour Shirvani,

Amin Nakhi,

Amirmohammad Karimi

et al. 2023

Int. J. Sci. Res. Arch.

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The rising global demand for energy, combined with environmental concerns linked to conventional energy sources, has spurred interest in sustainable and diverse alternatives. This study focuses on enhancing the efficiency of energy conversion devices, specifically solid oxide fuel cells (SOFCs). While conventional Ni/YSZ cermet anodes show promise for the anode of SOFCs, they face challenges, prompting exploration into alternative materials such as Sr2MMoO6-δ (M= Fe, Co, Ni) perovskites. This work investigates the electro-oxidation of methane on Sr2CoMoO6-δ (SCM) anodes and explores the impact of Pd infiltration as a metallic element together with LaFe0.6Co0.4O3 and as a dopant in LaFe0.58Co0.37Pd0.05O3-δ (LFCP). Experimental results reveal improved performance, reduced polarization resistance, and enhanced catalytic activity in SCM anodes impregnated with LFCP, attributed to the homogeneous dispersion of nanoparticles within the anode structure. The study provides insights into optimizing SOFC anode materials for efficient methane electro-oxidation, with potential applications in clean energy technologies.

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Temperature dependency of activity of nano-catalysts on La0.6Sr0.4Co0.2Fe0.8O3−δ cathode of solid oxide fuel cells

Cited by 18 publications

References 33 publications

In Situ Self-Reconstructed Nanoheterostructure Catalysts for Promoting Oxygen Reduction Reaction

In Situ Self-Reconstructed Nanoheterostructure Catalysts for Promoting Oxygen Reduction Reaction

Unveiling the Promoted LSTM/YSZ Composite Anode for Direct Utilization of Hydrocarbon Fuels

Optimizing methane direct utilization: The advanced Sr2CoMoO6-δ anode

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