Supported [Rh10Se] catalyst on TiO2 converted carbon dioxide into ethanol faster (6.0 x 10**-3 mol h(-1)gcat(-1)) and more selectively (ca. 83%) than other supported Rh clusters or [Rh10Se] on ohter inorganic oxides, presumably due to the effects of interstitial Se and the interface of the [Rh10Se] cluster and TiO2.