New insight into hydroxyl-mediated NH3 formation on the Rh-CeO2 catalyst surface during catalytic reduction of NO by CO

A hydroxyl-induced water-gas shift reaction results in NH3 formation on the surface of Rh-CeO2 catalyst, suggesting that NH3 production should be considered in the catalytic reduction of NO by CO in future studies. Water vapor in the gas mixture stream has a significant influence on NH3 release.