CO2 sensing characteristics and mechanism for LaCoO3 predicted by density function theory

- We explain why the resistance of P-type LaCoO3 increases when CO2 is introduced.
- The CO2 acts as an acceptor with one O2 adsorbed on LaCoO3 (1 1 0) surface.
- The CO2 acts as a donator with two O2 adsorbed on LaCoO3 (1 1 0) surface.