“…Plasma-assisted catalysis (PAC) is generally fabricated by "non-equilibrium plasma" (or "cold plasma"), a partially or fully ionized gas containing various particles including electrons, ions, atoms, radicals, and metastable species, 24 which has shown potential in destruction of environmental pollutants. [25][26][27] It could give electrons sufficient energy to cause the rupture of molecular bonds, thus enabling conventional high-temperature thermally driven reactions to proceed at low temperature and atmospheric pressure. [28][29][30] For CO oxidation, cold plasma can give enhanced CO conversion on CuO nanowires at a temperature of over 100 C. 31 Combining PAC and CTL, a plasmaassisted CTL method has been recently used for the sensing of hydrocarbons at a temperature of higher than 190 C. 32,33 However, considering the explosion hazards of CO at relatively high temperature, the sensing of CO at low temperature comes to be important.…”