| Sr2MgMoO6阳极材料制备与催化性能 | |
| Anode Material Sr2MgMoO6: Preparation and Catalytic Performance | |
| 摘要: 通过溶胶-凝胶过程制备了固体氧化物燃料电池双钙钛矿阳极材料Sr2MgMoO6（SMMO），研究了样品制备过程对材料的相态结构组成、传输性能、H2氧化催化活性等方面的影响。结果表明，SMMO对制备过程的要求高，难以通过简单一步退火反应获得相态纯净的双钙钛矿结构，高纯度的SMMO需要经过反复混合及充分退火反应制取，同时样品中少量的杂质相SrMoO4也很难彻底消除；样品中的杂质对材料的电导率有明显影响，纯度越高，材料的导电传输性能越好；SMMO的纯度对阳极材料的电化学性能影响很大，纯度越高，阳极的界面阻力越小，阳极催化氧化H2的性能越好，对应单电池的输出功率越大；在800℃下，SMMO阳极的界面电阻低至1.07 Ω·cm2，对应单电池的输出功率可达710 mW·cm-2。 | |
| 关键词: 固体氧化物燃料电池 阳极 双钙钛矿 电化学性能 | |
| 基金项目: 国家自然科学基金（No.52062006）和贵州省基础研究计划（黔科合基础-ZK[2021]一般237）资助 | |
| Abstract: Double-perovskite oxide Sr2MgMoO6 (SMMO) was prepared as anode material for solid-oxide fuel cells by the sol-gel route. The effect of the material preparation scenario on the phase constituents, transport property, and catalyzing activity for H2 oxidization was investigated. The results show that the preparation process of SMMO requires strict control, and a phase-pure sample with a double-perovskite structure can be hardly synthesized by a one-step annealing reaction, and a high purity grade of SMMO requires the repeated thorough mixing and full annealing. In the meanwhile, impurity phase SrMoO4 in a very small amount is almost unavoidable. The impure substance in samples affects a great deal of the electrical conductivity of this material, and a purer sample exhibits better conductive performance. The purity of SMMO has a tremendous impact on the electrochemical performance of this material, and a purer sample exhibits a lower anode interfacial resistance, a higher catalyzing activity for H2 oxidizing, and a larger power output of the corresponding single cell. At a temperature of 800℃, the area-specific resistance of the SMMO anode was as low as 1.07 Ω·cm2, and power output from the corresponding single cell reached to 710 mW·cm-2. | |
| Keywords: solid-oxide fuel cell anode double-perovskite electrochemical performance | |
| 投稿时间：2022-04-12 修订日期：2022-07-18 | |
| 摘要点击次数: 3780 | |
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| 李付绍,徐应仙,武青青,沈虎峻,邓明森.Sr2MgMoO6阳极材料制备与催化性能[J].无机化学学报,2022,38(10):2028-2036. | |
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