Exsolution of transition metals in perovskites is a potential way to improve the catalytic activity of fuel cell anode materials. In this work, the double-perovskite anodes PR-NdBaFe_2–xCo_xO_5+δ (x = 0.1, 0.2; PR-NBFC10, PR-NBFC20) with the exsolved Co_0.72Fe_0.28 metal alloy nanoparticles were obtained by heat treatment in 5% H₂/Ar post-reduction at 850 °C. The exsolved Co–Fe alloy nanoparticle catalyst uniformly distributed on the surface of the cobalt-doped PR-NBFC10 and PR-NBFC20 ceramic anodes facilitates the catalytic activity compared with the undoped PR-NdBaFe_2–xCo_xO_5+δ (x = 0; PR-NBFC0) anode. The maximum power density of single cells with PR-NBFC0, PR-NBFC10, and PR-NBFC20 anodes supported by a 200 μm thick La_0.9Sr_0.1Ga_0.8Mg_0.2O_3−δ electrolyte at 850 °C in wet H₂ reached 842, 1110, and 1247 mW cm^–2, respectively. In addition, PR-NBFC0, PR-NBFC10, and PR-NBFC20 exhibit relatively stable output power in a wet CH₄ fuel within 100 h of operation. Since the exsolved Co–Fe alloy nanoparticles have an embedded structure, they exhibit impressive anticoking properties, which greatly expand their application. The PR-NBFC double perovskite containing Co–Fe alloy nanoparticles offers possibilities for finding promising high-catalytic-activity and high-stability anodes for solid oxide fuel cells.

中文翻译：

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NdBaFe _{2– x} Co _x O _{5 +δ}双钙钛矿与已溶解的Co–Fe合金纳米粒子，作为直接稳定的碳氢化合物固体燃料电池的高效稳定阳极

过渡金属在钙钛矿中的存在是改善燃料电池阳极材料催化活性的潜在途径。在这项工作中，通过加热获得了具有溶解的Co _0.72 Fe _0.28金属合金纳米粒子的双钙钛矿阳极PR-NdBaFe ₂ - _x Co _x O _{5 +δ}（x = 0.1，0.2; PR-NBFC10，PR-NBFC20）在850°C下进行5％H ₂ / Ar后还原处理。与未掺杂的PR-NdBaFe ₂ – _x Co _x O相比，溶解的Co-Fe合金纳米颗粒催化剂均匀地分布在掺杂钴的PR-NBFC10和PR-NBFC20陶瓷阳极的表面上。_{5 +δ}（x = 0; PR-NBFC0）阳极。在湿H _2中在850°C下由200μm厚的La _0.9 Sr _0.1 Ga _0.8 Mg _0.2 O3 _-δ电解质支撑的PR-NBFC0，PR-NBFC10和PR-NBFC20阳极的单电池的最大功率密度达到842 ，1110和1247 mW cm ^–2。另外，PR-NBFC0，PR-NBFC10和PR-NBFC20在湿式CH _4中表现出相对稳定的输出功率。在运行100小时内加油。由于溶解的Co-Fe合金纳米颗粒具有嵌入式结构，因此它们具有令人印象深刻的抗结焦性能，从而极大地扩展了其应用范围。含Co-Fe合金纳米颗粒的PR-NBFC双重钙钛矿为固体氧化物燃料电池寻找有希望的高催化活性和高稳定性阳极提供了可能性。