Progress report on the catalyst layers for hydrocarbon-fueled SOFCs

Zhang, Panpan; Yang, Zhibin; Jin, Yiqian; Liu, Changlei; Lei, Ze; Chen, Fanglin; Peng, Suping

doi:10.1016/j.ijhydene.2021.09.198

Cited by 42 publications

(23 citation statements)

References 108 publications

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“…The utilization of the liquid hydrocarbons offers additional benefits of higher energy density and reduced transportation cost. Thus, developing the direct liquid fuel SOFCs would be of significance to promote their commercialization [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Functional ceramic support as an independent catalyst layer for direct liquid fuel solid oxide fuel cells

Luo¹,

Zhao²,

Zhao³

et al. 2023

Journal of Advanced Ceramics

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A porous ceramic support is designed as a multi-functional independent catalyst layer for solid oxide fuel cells (SOFCs) running on liquid hydrocarbon fuel. The layer consists of a highly porous Ce 0.9 Ca 0.1 O 2−δ ceramic backbone and active NiMo catalysts, which could be integrated into the conventional Ni metal containing the anode for internal reforming of the hydrocarbon fuel. Compared to conventional catalyst layers sintered on the anodes, this independent catalyst layer could be simply assembled on top of the anode without additional sintering, thereby avoiding the mismatch of the thermal expansion coefficient between the catalyst layer and the anode and improving stability of a single cell. Moreover, a current collector layer could be inserted between the catalyst and the anode to enhance current collection efficiency and electrochemical performance of the single cell. At 750 ℃, the independent catalyst layer displays high activity towards the catalytic decomposition of methanol, and the single cell could achieve the maximum power density of 400-500 mW•cm −2 in dry methanol. Furthermore, by employing the independent catalyst layer, the single cell offers additional in-situ catalyst regeneration capability under the methanol operation mode. Feeding 10 mL•min −1 air into an anode channel for 5 min is found to be effective to burn out carbon species in the catalyst layer, which reduces the degradation rate of the cell voltage by orders of magnitude from 2.6 to 0.024 mV•h −1 during the operation of 360 h in dry methanol. The results demonstrate the significance of the independent catalyst layer design for direct internal reforming methanol fuel cells.

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Section: Introductionmentioning

confidence: 99%

Functional ceramic support as an independent catalyst layer for direct liquid fuel solid oxide fuel cells

Luo¹,

Zhao²,

Zhao³

et al. 2023

Journal of Advanced Ceramics

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“…Tailored activity toward hydrocarbons has been provided by MnO x impregnated on LSGF. As a starting point, LSGF is known to show activity toward methane oxidation, a characteristic shared by ferrite-based materials. , Mn-based oxides have been extensively studied for the oxidation of hydrocarbons. − Baldi et al studied the activity of α-Mn 2 O 3 and Mn 3 O 4 for propane oxidation and spinel-type phase Mn 3 O 4 exhibits a slightly higher activity than α-Mn 2 O 3 . In addition, Chen et al .…”

Section: Introductionmentioning

confidence: 99%

Rational Development of IT-SOFC Electrodes Based on the Nanofunctionalization of La_0.6Sr_0.4Ga_0.3Fe_0.7O₃ with Oxides. Part 2: Anodes by Means of Manganite Oxide

Cavazzani

Bedon

Carollo

et al. 2022

ACS Appl. Energy Mater.

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To promote the diffusion on the market of solid oxide fuel cell (SOFC) devices, the use of fuels other than the most appealing hydrogen and also decreasing the working temperature could show the way forward. In the first part, we concentrated our efforts on cathodes; hereby, we focused on anodes and concentrated our efforts to develop a sustainable multifuel anode. We decided to develop LSGF (La 0.6 Sr 0.4 Ga 0.3 Fe 0.7 O 3 )-based nanocomposites by depositing manganite oxide to enhance the performance toward propane. MnO x has been deposited by a wet impregnation method, and the powders have been largely characterized by X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray analysis, X-ray photoelectron spectroscopy, hydrogen temperature-programmed reduction, oxygen temperature-programmed desorption, and N 2 adsorption. Cell performances were first collected in hydrogen as a function of both the temperature and hydrogen content. EIS measurements were studied using Nyquist and Bode plots, and they show two processes at high frequency, assigned to charge transfer at the electrode/electrolyte interface, and at low frequency due to the dissociative adsorption of hydrogen. The Arrhenius plot of area specific resistance suggests two different trends, and the activation energy decreases from 117 kJ/mol at 750 °C to 46 kJ/mol above that temperature. This behavior is often connected to chemical modification of the catalyst or changes in the limiting step processes. Power densities in hydrogen and propane were determined at 744 °C after 1 h of operation, achieving 70 mW/cm 2 in H 2 and 67 mW/cm 2 in C 3 H 8 . The open-circuit voltage increases from 1.10 V in hydrogen to 1.13 V in propane.

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“…Therefore a nickel catalyst is a more viable option for application in SR on an industrial-scale, even though it is more prone to carbon formation than noble metal catalysts [85,[92][93][94].…”

Section: Alternative Fuels For Sofcmentioning

confidence: 99%

“…Coke formation on the anode will lead to a rapid and irreversible degradation of the fuel cell performance. As a result, a strategy was proposed to add a catalytic functional layer on top of the SOFC anode to reform the fuel before it gets in contact with the anode layer [70,89,94,198]. In this configuration, the catalyst material can be selected to ensure the highest possible hydrogen conversion.…”

Section: Evaluation Of Ni/cgo Nanocubes and Nanorods As A Catalyst Fo...mentioning

confidence: 99%

“…However, a transition metal catalyst is a more viable option for industrial-scale application than a noble metal. Low-cost catalysts, based on a support with a low Ni content, are commonly used as they were shown as stable and to have a high activity for H2 conversion for ethanol steam reforming [94,[201][202][203].…”

Section: Evaluation Of Ni/cgo Nanocubes and Nanorods As A Catalyst Fo...mentioning

confidence: 99%

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Development of functional layers for direct ethanol solid oxide fuel cells

Livinalli¹

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Progress report on the catalyst layers for hydrocarbon-fueled SOFCs

Cited by 42 publications

References 108 publications

Functional ceramic support as an independent catalyst layer for direct liquid fuel solid oxide fuel cells

Functional ceramic support as an independent catalyst layer for direct liquid fuel solid oxide fuel cells

Rational Development of IT-SOFC Electrodes Based on the Nanofunctionalization of La_0.6Sr_0.4Ga_0.3Fe_0.7O₃ with Oxides. Part 2: Anodes by Means of Manganite Oxide

Development of functional layers for direct ethanol solid oxide fuel cells

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Progress report on the catalyst layers for hydrocarbon-fueled SOFCs

Cited by 42 publications

References 108 publications

Functional ceramic support as an independent catalyst layer for direct liquid fuel solid oxide fuel cells

Functional ceramic support as an independent catalyst layer for direct liquid fuel solid oxide fuel cells

Rational Development of IT-SOFC Electrodes Based on the Nanofunctionalization of La0.6Sr0.4Ga0.3Fe0.7O3 with Oxides. Part 2: Anodes by Means of Manganite Oxide

Development of functional layers for direct ethanol solid oxide fuel cells

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Rational Development of IT-SOFC Electrodes Based on the Nanofunctionalization of La_0.6Sr_0.4Ga_0.3Fe_0.7O₃ with Oxides. Part 2: Anodes by Means of Manganite Oxide