In situ fabrication of CoFe alloy nanoparticles structured (Pr0.4Sr0.6)3(Fe0.85Nb0.15)2O7 ceramic anode for direct hydrocarbon solid oxide fuel cells

Yang, Chenghao; Li, Jiao; Lin, Ye; Liu, Jiang; Chen, Fanglin; Liu, Meilin

doi:10.1016/j.nanoen.2014.12.001

Cited by 175 publications

(114 citation statements)

References 36 publications

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“…This not only allows for such attractive structural interplay, but also for combining it with other desirable electrode functionality (see Figure 2a) 84,87,89,91,95 , chromite 86,90,94 or chromite-manganite 93,96 perovskite supports. These have been applied to solid oxide fuel cells 86,90,92,94,97 , electrolysis cells 95,98 and for other catalytic process 36,84,85 .…”

Section: Exsolutionmentioning

confidence: 99%

Evolution of the electrochemical interface in high-temperature fuel cells and electrolysers

et al. 2016

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Section: Exsolutionmentioning

confidence: 99%

Evolution of the electrochemical interface in high-temperature fuel cells and electrolysers

et al. 2016

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“…2 Moreover, its coefficient of thermal expansion (13.2 × 10 −6 K −1 ) 4,7 is compatible to doped ceria (13 × 10 −6 K −1 ) 7 and yttria-stabilized zirconia (11 × 10 −6 K −1 ) 7 electrolytes. The electrochemical performance of PNO, however, did show an appreciative degradation 4 which likely resulted from its readily occurring phase transitions at operating conditions.…”

mentioning

confidence: 93%

“…During the past few years, praseodymium nickelate (Pr 2 NiO 4+δ , PNO) has attracted increasing attention as the cathode for solid oxide fuel cells (SOFCs) because of its unique properties over a wide temperature range, [1][2][3][4][5] including: (1) a high oxygen diffusion coefficient (e.g. 8 × 10 −8 cm 2 s −1 at 750 • C), (2) a high surface exchange coefficient (e.g.…”

mentioning

confidence: 99%

Activity and Stability of (Pr_1-xNd_x)₂NiO₄as Cathodes for Solid Oxide Fuel Cells

Dogdibegovic

Guan

Yan

et al. 2016

J. Electrochem. Soc.

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Single phase (Pr 1-x Nd x ) 2 NiO 4 cathode powders (x = 0, 0.25, 0.50, 0.75, and 1.0) were synthesized via a glycine-nitrate combustion and high temperature calcination. Anode supported cells were used to investigate the cathode property. A reproducible performance, within 9% for each cathode composition, was observed providing a wealth of data for quantitative studies. Area specific resistance analysis and i-V measurements between 650 and 850 • C showed a decrease in the cell performance with increasing Nd content. Impedance spectrum analysis suggests that the decline in performance results from an increase in electrode polarization. While Pr 2 NiO 4 cells showed significant performance degradation of 6.40%/1,000 hours, the degradation rate for (Pr 0.75 Nd 0.25 ) 2 NiO 4 cells was reduced by an order of magnitude (0.56%/1,000 hours) with a 7% lower power output. Likewise, the cathodes with a higher Nd content showed further improvement in performance stability with a marginal degradation rate of 0.06%/1,000 hours. During the past few years, praseodymium nickelate (Pr 2 NiO 4+δ , PNO) has attracted increasing attention as the cathode for solid oxide fuel cells (SOFCs) because of its unique properties over a wide temperature range, 1-5 including: (1) a high oxygen diffusion coefficient (e.g.(3) a low polarization resistance in a single cell, (4) a large oxygen overstoichiometry (δ as much as 0.22 at room temperature), 6 and (5) the ability to accept various substituents with similar ionic radii and valance at Pr and/or Ni sites.2 Moreover, its coefficient of thermal expansion (13.2 × 10 −6 K −1 ) 4,7 is compatible to doped ceria (13 × 10 −6 K −1 ) 7 and yttria-stabilized zirconia (11 × 10 −6 K −1 ) 7 electrolytes. The electrochemical performance of PNO, however, did show an appreciative degradation 4 which likely resulted from its readily occurring phase transitions at operating conditions. 8 PNO partially decomposes to praseodymium oxide (PrO x ) and a higher order layered structure (Pr 3 Ni 2 O 7 ) during operation, 8 which presents a concern because of possible structural collapse and longterm performance degradation. 4,8 Current approaches to stabilize the PNO phase focus on substituting A and/or B-site ions.9,10 Both La 2 NiO 4 and Nd 2 NiO 4 (NNO) are more stable than PNO, 11 but have lower power density.12 This work reports an attempt to stabilize the long-term cell performance in praseodymium nickelate. (Pr 1-x Nd x ) 2 NiO 4 (PNNO, x = 0, 0.25, 0.50, 0.75, and 1.0) cathodes were synthesized and electrochemically evaluated in anode supported cells. Nd was chosen as an A-site substituent due to its similar physical properties to Pr and its ability to suppress the formation of PrO x and higher order phases. The i-V and electrochemical impedance spectroscopy (EIS) measurements were performed between 650-850• C, while the performance stability was measured at 750• C and 0.8 V for 500 hours. ExperimentalStarting materials, Pr(NO 3 ) 3 , Nd(NO 3 ) 3 , and Ni(NO 3 ) 2 (99.9% REO, Alfa Aesar, Haverhill, MA) were...

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“…A recent interest for Pr 2 NiO 4+δ (PNO) 5 stems from its superior properties over commonly used cathode materials 6 and the ability to accept various substituents at Pr and/or Ni sites, which allows for modifications of material's intrinsic properties. 5,7 Such properties allow the PNO to be used on commonly utilized yttrium stabilized zirconia and gadolinium doped ceria electrolytes.…”

mentioning

confidence: 99%

Activity and Stability of (Pr_1-xNd_x)₂NiO_4+δas Cathodes for Oxide Fuel Cells: Part VI. The Role of Cu Dopant on the Structure and Electrochemical Properties

Dogdibegovic

Yan

Cai

et al. 2017

J. Electrochem. Soc.

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Phase instability in praseodymium nickelates is a major concern for the long-term operations of solid oxide fuel cells since it may lead to the performance degradation. In this work, praseodymium nickelates (ex. Pr 2 NiO 4+δ ) have been stabilized via substitution on both Pr-and Ni-sites. Systematic studies over a wide range of compositions were conducted via long-term thermal annealing studies (T ≤ 870 • C) and electrochemical tests in full cells. Proposed (Pr 0.50 Nd 0.50 ) 2 Ni 1-y Cu y O 4+δ compositions (y = 0. 05, 0.10, 0.20, and 0.30) showed the most promising results and serve as a comprehensive extension to our previous studies in this series of papers. A stable long-term performance was obtained for temperatures up to 790 • C for 500 hours at 0.80 V with a minimal tradeoff between the activity (power density of 0. Solid oxide fuel cells (SOFCs) attract growing interests as residential and industrial power sources primarily because of their high flexibility to a wide variety of fuels, including CO, hydrocarbons, and coal. In addition, SOFCs exhibit a high efficiency in combined heat and power systems (up to 80%) due to the direct conversion of chemical energy to electricity and heat, which is not limited by the Carnot cycle.1-3 Moreover, SOFC power systems are more affordable alternative to unreliable backup power systems that often tend to fail during startups and are only used in cases of main grid failures. 4 One of the key components in an SOFC is the cathode which catalyzes the oxygen reduction reaction (ORR). Cathodes with a low polarization resistance, stable structure, and stable performance over a wide temperature window are highly desired. A recent interest for Pr 2 NiO 4+δ (PNO) 5 stems from its superior properties over commonly used cathode materials 6 and the ability to accept various substituents at Pr and/or Ni sites, which allows for modifications of material's intrinsic properties.5,7 Such properties allow the PNO to be used on commonly utilized yttrium stabilized zirconia and gadolinium doped ceria electrolytes.PNO-based SOFCs, however, exhibit a performance degradation, 6,8 which may be linked to a rapid phase transition in PNO, 9 thus require means to stabilize its crystal structure. It has been a challenge to develop a compositional window which results in both stable structure and desirable catalytic activity. Our recent report 6 shows that A-site substitution with Nd in (Pr 1-x Nd x ) 2 NiO 4+δ cathodes is a promising solution to stabilize the cell performance. However, with a low Nd-content (≤ 50 mol%), a long-term operation leads to phase transition. In contrast, a high Nd content results in a stable phase during a 2,500-hour test, 10 but with a much lower performance (fourfold decrease). Therefore, further compositional modifications are required to simultaneously obtain high catalytic activity and stable crystal structure.An approach taken in this work was to substitute the Nisite in a promising (Pr 0.50 Nd 0.50 ) 2 NiO 4+δ (PNNO5050) electrode, * Electrochemical Society M...

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In situ fabrication of CoFe alloy nanoparticles structured (Pr0.4Sr0.6)3(Fe0.85Nb0.15)2O7 ceramic anode for direct hydrocarbon solid oxide fuel cells

Cited by 175 publications

References 36 publications

Evolution of the electrochemical interface in high-temperature fuel cells and electrolysers

Evolution of the electrochemical interface in high-temperature fuel cells and electrolysers

Activity and Stability of (Pr_1-xNd_x)₂NiO₄as Cathodes for Solid Oxide Fuel Cells

Activity and Stability of (Pr_1-xNd_x)₂NiO_4+δas Cathodes for Oxide Fuel Cells: Part VI. The Role of Cu Dopant on the Structure and Electrochemical Properties

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In situ fabrication of CoFe alloy nanoparticles structured (Pr0.4Sr0.6)3(Fe0.85Nb0.15)2O7 ceramic anode for direct hydrocarbon solid oxide fuel cells

Cited by 175 publications

References 36 publications

Evolution of the electrochemical interface in high-temperature fuel cells and electrolysers

Evolution of the electrochemical interface in high-temperature fuel cells and electrolysers

Activity and Stability of (Pr1-xNdx)2NiO4as Cathodes for Solid Oxide Fuel Cells

Activity and Stability of (Pr1-xNdx)2NiO4+δas Cathodes for Oxide Fuel Cells: Part VI. The Role of Cu Dopant on the Structure and Electrochemical Properties

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Activity and Stability of (Pr_1-xNd_x)₂NiO₄as Cathodes for Solid Oxide Fuel Cells

Activity and Stability of (Pr_1-xNd_x)₂NiO_4+δas Cathodes for Oxide Fuel Cells: Part VI. The Role of Cu Dopant on the Structure and Electrochemical Properties