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Cu-Ce0.8Sm0.2O2-δ anode for electrochemical oxidation of methanol in solid oxide fuel cell: Improved activity by La and Nd doping
Solid State Ionics ( IF 3.0 ) Pub Date : 2021-08-12 , DOI: 10.1016/j.ssi.2021.115728
Yongxin Zhang , Zhiyong Huang , Tian Gan , Nianjun Hou , Lijun Fan , Xin Zhou , Ge Gao , Jingyu Li , Yicheng Zhao , Yongdan Li

Cusingle bondCe0.8La0.1Sm0.1O2-δ and Cusingle bondCe0.8Nd0.1Sm0.1O2-δ are studied as anode materials for solid oxide fuel cells with methanol as fuel. The oxygen surface exchange and bulk diffusion coefficients of Ce0.8Sm0.2O2-δ both increase with La and Nd doping. The CH3OH temperature-programmed surface reaction results show that the addition of La and Nd accelerates the chemical oxidation of CH3OH. Furthermore, compared with Cusingle bondCe0.8Sm0.2O2-δ, the anodes with La and Nd show higher resistance to coking in CH3OH atmosphere. The Cu-based cermet anode exhibits a low catalytic activity for the electrochemical oxidation of H2, and a single cell supported by a Ce0.8Sm0.2O2-δ‑carbonate composite electrolyte with Cusingle bondCe0.8Sm0.2O2-δ anode exhibits a maximum power density of 160 mW cm−2 at 650 °C using dry hydrogen as fuel. However, the maximum power density reaches 550 mW cm−2 when CH3OH is used as fuel, and further increases to 730 and 830 mW cm−2 with the addition of La and Nd in the anode, respectively. The results indicate that with the promotion of the oxygen activity, the Cu-based cermet is a promising anode material for solid oxide fuel cells using CH3OH as fuel.



中文翻译:

用于固体氧化物燃料电池甲醇电化学氧化的 Cu-Ce0.8Sm0.2O2-δ 阳极:通过 La 和 Nd 掺杂提高活性

Cu 单键Ce 0.8 La 0.1 Sm 0.1 O 2-δ和Cu 单键Ce 0.8 Nd 0.1 Sm 0.1 O 2-δ被研究作为以甲醇为燃料的固体氧化物燃料电池的阳极材料。Ce 0.8 Sm 0.2 O 2-δ的氧表面交换和体扩散系数都随着La和Nd的掺杂而增加。CH 3 OH程序升温表面反应结果表明,La和Nd的加入加速了CH 3 OH的化学氧化。此外,与 Cu 单键Ce 0.8 Sm 0.2 相比O 2-δ,具有La和Nd的阳极在CH 3 OH气氛中表现出更高的抗结焦性。Cu基金属陶瓷阳极对H 2的电化学氧化表现出低催化活性,由Ce 0.8 Sm 0.2 O 2-δ-碳酸盐复合电解质支撑的单电池与Cu 单键Ce 0.8 Sm 0.2 O 2-δ阳极表现出使用干氢作为燃料,在 650°C 下的最大功率密度为 160 mW cm -2。然而,当CH 3 OH用作燃料时,最大功率密度达到550 mW cm -2,并进一步增加到730和830 mW cm -2分别在阳极中添加 La 和 Nd。结果表明,随着氧活性的提高,Cu基金属陶瓷是一种很有前途的以CH 3 OH为燃料的固体氧化物燃料电池的负极材料。

更新日期:2021-08-12
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