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Sr1−xCaxMoO3–Gd0.2Ce0.8O1.9 as the anode in solid oxide fuel cells : effects of Mo precipitation

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : Sr1−xCaxMoO3–Gd0.2Ce0.8O1.9 as the anode in solid oxide fuel cells : effects of Mo precipitation
นักวิจัย : Xiao, Peng , Ge, Xiaoming , Liu, Zhaolin , Wang, Jing-Yuan , Wang, Xin
คำค้น : DRNTU::Engineering::Chemical engineering
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2556
อ้างอิง : Xiao, P., Ge, X., Liu, Z., Wang, J.-Y., & Wang, X. (2014). Sr1−xCaxMoO3–Gd0.2Ce0.8O1.9 as the anode in solid oxide fuel cells: Effects of Mo precipitation. Journal of Alloys and Compounds, 587, 326-331. , 0925-8388 , http://hdl.handle.net/10220/19371 , http://dx.doi.org/10.1016/j.jallcom.2013.10.187
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Journal of alloys and compounds
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

Calcium is incorporated into strontium molybdate to form Sr1-xCaxMoO3 as an electronic conductor for solid oxide fuel cells (SOFCs). Metallic molybdenum was observed with the increasing content of Ca substitution for Sr in Sr1-xCaxMoO3. Rietveld refinement reveals the phase transition from cubic to tetragonal perovskite structure, which implies its decreased thermodynamic stability under reducing conditions with increasing content of Ca. X-ray diffraction (XRD) and differential scanning calorimetry-thermo-gravimetric analysis (DSC-TGA) further prove that this Mo ex-solution is reversible. The electrochemical performances of Sr1-xCaxMoO3 towards H2 and CH4 oxidation at 800 ºC are examined. The performance is improved in H2 atmosphere with the introduction of Ca, 330 mW cm-2 of Sr0.5Ca0.5MoO3–Gd0.2Ce0.8O1.9 (GDC) vs. 280 mW cm-2 of SrMoO3–GDC, which can be ascribed to the segregated Mo as the additional catalyst. However, carbon deposition is observed after exposure to CH4 at 800 ºC for both Sr0.7Ca0.3MoO3‒GDC and Sr0.5Ca0.5MoO3‒GDC, in contrast to the absence of carbon on SrMoO3‒GDC.

ASTAR (Agency for Sci., Tech. and Research, S’pore)

บรรณานุกรม :
Xiao, Peng , Ge, Xiaoming , Liu, Zhaolin , Wang, Jing-Yuan , Wang, Xin . (2556). Sr1−xCaxMoO3–Gd0.2Ce0.8O1.9 as the anode in solid oxide fuel cells : effects of Mo precipitation.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Xiao, Peng , Ge, Xiaoming , Liu, Zhaolin , Wang, Jing-Yuan , Wang, Xin . 2556. "Sr1−xCaxMoO3–Gd0.2Ce0.8O1.9 as the anode in solid oxide fuel cells : effects of Mo precipitation".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Xiao, Peng , Ge, Xiaoming , Liu, Zhaolin , Wang, Jing-Yuan , Wang, Xin . "Sr1−xCaxMoO3–Gd0.2Ce0.8O1.9 as the anode in solid oxide fuel cells : effects of Mo precipitation."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2556. Print.
Xiao, Peng , Ge, Xiaoming , Liu, Zhaolin , Wang, Jing-Yuan , Wang, Xin . Sr1−xCaxMoO3–Gd0.2Ce0.8O1.9 as the anode in solid oxide fuel cells : effects of Mo precipitation. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2556.