Commercial　TiO2　supported　0.20　wt%　N　catalyst　is　obtained　via　the　molten　salt　method,　and　both　N　nanoparticles　and　single　atom　N　sites　are　observed.　It　exhibits　high　catalytic　performance　for　toluene　oxidation,　with　T-50　and　T-90　being　173　and　183　degrees　C,　respectively.　Reaction　intermediates　including　benzene,　p-xylene,　o-xylene,　benzaldehyde,　phthalic　acid,　maleic　anhydride,　itaconic　anhydride,　acetone,　and　acetic　acid,　are　detected　during　toluene　oxidation.　On　this　basis,　likely　toluene　combustion　reaction　pathway　is　provided.　Benzaldehyde　is　the　most　stable　surface　intermediate,　and　its　oxidation　can　be　rate-limiting　for　the　entire　toluene　oxidation　reaction.　2-10.0　vol%　H2O　slightly　inhibits　the　reaction　by　competing　surface　sites　with　the　reactant,　while　it　does　not　poison　the　catalyst.　2.5-10.0　vol%　CO2　slightly　poisons　the　catalyst　by　surface　carbonate　formation,　whereas　50　ppm　SO2　severely　poisons　the　catalyst　by　sulfite/sulfate　formation.