The interaction of oxygen with isolated silver particles of ca. 70 nm supported on α-alumina. Part 2.—CO oxidation measurements

Low-temperature selective oxidation of CO in H2-rich gases over Ag/SiO2 catalysts

“…However, the O 2 pretreated and the He pretreated catalysts exhibit higher activity and selectivity at low temperatures than those of the H 2 pretreated catalyst. Meima et al have reported that a severe deactivation of an alumina supported silver catalyst for CO oxidation occurred after reduction at 400 • C and subsequent cooling in nitrogen [28]. Accordingly, similar deactivation phenomenon of the Ag/SiO 2 catalyst treated with hydrogen at high temperatures can also be observed.…”