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Low platinum catalyst supported on titanium molybdenum nitride for efficient CO sensing.
- Source :
-
Sensors & Actuators B: Chemical . Aug2022, Vol. 364, pN.PAG-N.PAG. 1p. - Publication Year :
- 2022
-
Abstract
- Gas sensing catalyst is the key to proton exchange membrane fuel cell type gas sensor. However, due to the limitations of Pt/C catalyst in an electronic structure and electrochemical stability, the sensing performance of the sensor inconformity the strict performance objectives, and new sensing materials are required. Here we demonstrate that a novel sensing catalyst, Pt/Ti 0.8 Mo 0.2 N, is a highly efficient CO sensing that outperforms the benchmark material Pt/TiN and Pt/C. Pt/Ti 0.8 Mo 0.2 N effectively reduces the cross-sensitivity of interfering gas and greatly improves the CO selectivity, sensitivity and long-term stability of the sensor. Simultaneously, profit by the design of a high humidity cathode sealing chamber, the relative humidity of the environment exhibits a slight impact on the sensor. Furthermore, we confirm that Pt/Ti 0.8 Mo 0.2 N exhibit the best gas sensing performance at low Pt loading of 15 wt%. This discovery points to the strategy of combining low-cost and high-performance electrode catalytic materials for new generation gas sensors. [Display omitted] • Ternary nitrides with high specific surface area are successfully synthesized by a simple method. • The Pt/Ti 0.8 Mo 0.2 N sensor exhibits excellent CO selectivity and long-term tolerance. • The Ti 0.8 Mo 0.2 N support reduces the platinum content and is conducive to reducing the cost of the sensor. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09254005
- Volume :
- 364
- Database :
- Academic Search Index
- Journal :
- Sensors & Actuators B: Chemical
- Publication Type :
- Academic Journal
- Accession number :
- 156649510
- Full Text :
- https://doi.org/10.1016/j.snb.2022.131917