Methane-selective oxidation to methanol and ammonia selective catalytic reduction of NOx over monolithic Cu/SSZ-13 catalysts: Are hydrothermal stability and active sites same?

•Methane-to-methanol reactions depend on zeolite crystal structure and Brønsted acid sites.•Different active Cu sites for methane-to-methanol and NH3-SCR were found.•[CuII(OH)]+ and CuxOy cluster species are important active sites for methane-to-methanol.•Apparent differences of hydrothermal stability in methane-to-methanol and SCR reactions were revealed.