TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The catalyst particles comprise nano-scale particles and/or the support particles comprise nanoscale particles; the catalyst particles comprise a transition metal or an oxide of a transition metal; the catalyst particles comprise a noble metal or an oxide of a noble metal; the support particles comprise a graphitic nanostructure; the graphitic carbon comprises carbon nanotubes and at least some of the catalyst particles are enveloped by the carbon nanotubes; or the support particles of graphitic carbon are electrospun. The partially reduced oxide comprises a transition metal selected from titanium, vanadium, zirconium, niobium, and/or molybdenum and/or the partially reduced oxide further comprises a dopant that is different than the transition metal. The dopant is selected from titanium, vanadium, zirconium, niobium, and/or molybdenum. The partially reduced oxide comprises a Magneli phase. The component is selected from tobacco cut filler, cigarette paper and cigarette filter material. The support particles comprise a graphitic nanostructure. The support particles comprise electrospun graphitic carbon. Preferred Method: The incorporating step involves spraying, dusting or immersing the supported catalyst particles. The supported catalyst particles are incorporated in the cigarette wrapper by spraying or coating the catalyst particles onto a wet base web, intermediate web or finished web. The catalyst particles are incorporated in an amount to convert at least 10% of carbon monoxide in mainstream tobacco smoke to carbon dioxide and/or convert at least 10% of nitric oxide in mainstream tobacco smoke to nitrogen, where the incorporating optionally includes combining the catalyst particles and at least one of the tobacco cut filler, cigarette wrapper and cigarette filter material in the absence of a liquid. When the support particles comprise carbon nanotubes, at least some of the catalyst particles are enveloped by the carbon nanotubes. EXAMPLE - No suitable example given.