In Situ Exsolved Ni Nanoparticles From Pr <sub>0.5</sub> Sr <sub>0.5</sub> Ti <sub>0.5</sub> Mn <sub>0.5</sub> O <sub>3</sub> with Varying Ni Doping Levels for Direct Methane Solid Oxide Fuel Cells

Methane (CH<sub>4</sub>), with abundant reserves and mature infrastructure, is an attractive fuel for solid oxide fuel cells (SOFCs). In this work, the effects of Ni doping on the electrochemical performance of Pr<sub>0.5</sub>Sr<sub>0.5</sub>Ti<sub>0.5</sub>Mn<sub>0.5</sub>O<sub>3</sub> (PSTM)-based anodes were investigated using Pr<sub>0.5</sub>Sr<sub>0.5</sub>Ti<sub>0.5</sub>Mn<sub>0.4</sub>Ni<sub>0.1</sub>O<sub>3</sub> (PSTMN41) and Pr<sub>0.5</sub>Sr<sub>0.5</sub>Ti<sub>0.5</sub>Mn<sub>0.5</sub>Ni<sub>0.1</sub>O<sub>3</sub> (PSTMN51). Ni incorporation and subsequent H<sub>2</sub> reduction generated highly dispersed Ni nanoparticles and abundant oxygen vacancies, enhancing electron transport and methane conversion. PSTMN41 exhibited superior catalytic activity and stability compared to PSTMN51 in humidified CH<sub>4</sub>. The PSTMN41-based cells achieved peak power densities of 119.6 and 60.7 mW·cm<sup>-</sup> <sup>2</sup> under H<sub>2</sub> and humidified CH<sub>4</sub> at 850°C, with polarization resistances of 1.7 and 2.44 Ω·cm<sup>2</sup>. Moreover, PSTMN41 maintained excellent stability over 120 h continuous operation in humidified CH<sub>4</sub>. These results demonstrate that PSTMN41, featuring Ni nanoparticles and high oxygen vacancy concentration, is a promising anode material for SOFCs.

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Small
Published
2026-01-23
DOI
https://doi.org/10.1002/smll.202512834
Primary Topic
Advancements in Solid Oxide Fuel Cells
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article
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article

In Situ Exsolved Ni Nanoparticles From Pr 0.5 Sr 0.5 Ti 0.5 Mn 0.5 O 3 with Varying Ni Doping Levels for Direct Methane Solid Oxide Fuel Cells

Shiji Xue, Fangjie Liu, Qingjie Wang, Weiwei Shang et al.
Small
Advancements in Solid Oxide Fuel Cells
article

In Situ Exsolved Ni Nanoparticles From Pr 0.5 Sr 0.5 Ti 0.5 Mn 0.5 O 3 with Varying Ni Doping Levels for Direct Methane Solid Oxide Fuel Cells

Shiji Xue, Fangjie Liu, Qingjie Wang, Weiwei Shang, Haizhao LI, Songyu Yang, Xin Wang, Sining Wang, Tao Jiang
article en

Abstract

Methane (CH<sub>4</sub>), with abundant reserves and mature infrastructure, is an attractive fuel for solid oxide fuel cells (SOFCs). In this work, the effects of Ni doping on the electrochemical performance of Pr<sub>0.5</sub>Sr<sub>0.5</sub>Ti<sub>0.5</sub>Mn<sub>0.5</sub>O<sub>3</sub> (PSTM)-based anodes were investigated using Pr<sub>0.5</sub>Sr<sub>0.5</sub>Ti<sub>0.5</sub>Mn<sub>0.4</sub>Ni<sub>0.1</sub>O<sub>3</sub> (PSTMN41) and Pr<sub>0.5</sub>Sr<sub>0.5</sub>Ti<sub>0.5</sub>Mn<sub>0.5</sub>Ni<sub>0.1</sub>O<sub>3</sub> (PSTMN51). Ni incorporation and subsequent H<sub>2</sub> reduction generated highly dispersed Ni nanoparticles and abundant oxygen vacancies, enhancing electron transport and methane conversion. PSTMN41 exhibited superior catalytic activity and stability compared to PSTMN51 in humidified CH<sub>4</sub>. The PSTMN41-based cells achieved peak power densities of 119.6 and 60.7 mW·cm<sup>-</sup> <sup>2</sup> under H<sub>2</sub> and humidified CH<sub>4</sub> at 850°C, with polarization resistances of 1.7 and 2.44 Ω·cm<sup>2</sup>. Moreover, PSTMN41 maintained excellent stability over 120 h continuous operation in humidified CH<sub>4</sub>. These results demonstrate that PSTMN41, featuring Ni nanoparticles and high oxygen vacancy concentration, is a promising anode material for SOFCs.

SmallVol. 22(17)
Henan University of Science and Technology (CN), Tsinghua University (CN)
Industry, innovation and infrastructure
Openalex Percentile: Top 80%
Advancements in Solid Oxide Fuel Cells
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In Situ Exsolved Ni Nanoparticles From Pr <sub>0.5</sub> Sr <sub>0.5</sub> Ti <sub>0.5</sub> Mn <sub>0.5</sub> O <sub>3</sub> with Varying Ni Doping Levels for Direct Methane Solid Oxide Fuel Cells — Shiji Xue, Fangjie Liu, et al. · Small (2026) | TGRS Research Map | TGRS