Yang Lei, Wang Shizhong, Blinn Kevin, Liu Mingfei, Liu Ze, Cheng Zhe, Liu Meilin
School of Materials Science and Engineering, Center for Innovative Fuel Cell and Battery Technologies, Georgia Institute of Technology, Atlanta, GA 30332, USA.
Science. 2009 Oct 2;326(5949):126-9. doi: 10.1126/science.1174811.
The anode materials that have been developed for solid oxide fuel cells (SOFCs) are vulnerable to deactivation by carbon buildup (coking) from hydrocarbon fuels or by sulfur contamination (poisoning). We report on a mixed ion conductor, BaZr(0.1)Ce(0.7)Y(0.2-)(x)Yb(x)O(3-delta), that allows rapid transport of both protons and oxide ion vacancies. It exhibits high ionic conductivity at relatively low temperatures (500 degrees to 700 degrees C). Its ability to resist deactivation by sulfur and coking appears linked to the mixed conductor's enhanced catalytic activity for sulfur oxidation and hydrocarbon cracking and reforming, as well as enhanced water adsorption capability.
已开发用于固体氧化物燃料电池（SOFC）的阳极材料容易因烃类燃料积碳（结焦）或硫污染（中毒）而失活。我们报道了一种混合离子导体BaZr(0.1)Ce(0.7)Y(0.2 -)(x)Yb(x)O(3 - δ)，它能使质子和氧离子空位快速传输。在相对较低温度（500摄氏度至700摄氏度）下，它表现出高离子电导率。其抗硫和抗结焦失活的能力似乎与混合导体对硫氧化、烃类裂解和重整的增强催化活性以及增强的水吸附能力有关。
