High‐Performance Electrode for Medium‐Temperature Operating Solid Oxide Fuel Cells Polarization Property of Ceria‐Based Anode with Highly Dispersed Ruthenium Catalysts in Gas
High‐Performance Electrode for Medium‐Temperature Operating Solid Oxide Fuel Cells Polarization Property of Ceria‐Based Anode with Highly Dispersed Ruthenium Catalysts in Gas
复制标题
中温固体氧化物燃料电池高性能电极高分散钌催化剂的二氧化铈基阳极在气体中的极化特性
DOI：
10.1149/1.1836703
复制
发表时间：
1996
影响因子：
3.9
通讯作者：
Masahiro Watanabe
中科院分区：
文献类型：
--
作者：
Hiroyula Uchida;N. Mochizuki;Masahiro Watanabe
研究了作者研制的中温固体氧化物燃料电池催化阳极在含H{sub 2}、CO{sub 2}和H{sub 2}O的合成气中的极化特性。在合成气和湿氢气氛下，在混合导电氧化物--钐掺杂氧化铈（SDC）阳极层上负载少量Ru微晶，可大大降低过电位。研究发现，由于SDC中电子和氧离子的高电导率，在燃气中的最佳氧分压下，Ru-SDC阳极表现出最高的电催化活性。当在SDC表面上负载0.1 mg/cm{sup 2}的Ru微催化剂并使用适当的燃料气体时，在800和1，000 C之间的所有操作温度下，在相对于空气参比电极的电位为{-}0.9 V时，Ru-SDC阳极上的最大电流密度超过1 A/Cm{sup 2}。
Polarization properties of catalyzed anode, which the authors developed for medium-temperature operating solid oxide fuel cells, were examined in a synthetic gas containing H{sub 2}, CO{sub 2}, and H{sub 2}O. The overpotential was greatly decreased by loading only a small amount of Ru microcrystals onto the mixed conducting oxide, samaria-doped ceria (SDC), anode layer in both synthetic gas and wet hydrogen atmospheres. It was found that the Ru-SDC anode exhibited the highest electrocatalytic activities at an optimum oxygen partial pressure in the fuel gas due to high conductivities of both electrons and oxide ions in the SDC. The maximum current density on the Ru-SDC anode exceeded 1 A/Cm{sup 2} at all the operating temperatures between 800 and 1,000 C at the potential of {minus}0.9 V vs. air reference electrode, when 0.1 mg/cm{sup 2} of Ru microcatalysts were loaded on the SDC surface and the appropriate fuel gas was used.