Operando Investigations of Rare-Earth Oxycarbonate CO2 Sensors

Proceedings

Sackmann, Andre¹  Staerz, Anna²  Lauxmann, Frieder³  Suzuki, Takuya⁴  Weimar, Udo⁵ 

[1] Applied Mineralogy, University of Tübingen, 72076 Tübingen, Germany;Author to whom correspondence should be addressed.;Corporate R&D Headquarters, Fujielectric Co. Ltd., Tokyo 1918502, Japan;Institute of Physical and Theoretical Chemistry, University of Tübingen, 72076 Tübingen, Germany;Presented at the Eurosensors 2018 Conference, Graz, Austria, 9–12 September 2018

关键词: gas sensor;    CO2;    rare-earth oxycarbonate;    oper;    o investigation;    XRD;   

DOI  :  10.3390/proceedings2130801

学科分类：社会科学、人文和艺术（综合）

来源: mdpi

【 摘 要 】

In this work, we have succeeded in synthesizing monoclinic and hexagonal La2O2CO3 using two different routes and revealed that both of them are sensitive to CO2 to the same degree. Moreover, we observed that the resistance of the sensor based on hexagonal phase is much higher and more stable than the one of the sensors based on the monoclinic phase. Using Operando and time resolved XRD measurements, we have also demonstrated that the resistivity of the sensor based on monoclinic La2O2CO3 increases because of the material transformation into the hexagonal phase during an exemplarily aging process.

【 授权许可】

CC BY