NANOSIZED GOLD CATALYSTS FOR CO OXIDATION AND WATER GAS SHIFT REACTIONS

摘要

Methods of making supported monolithic gold (Au) catalysts that can be used for generating a hydrogen-rich gas from gas mixtures containing carbon monoxide, hydrogen and water via a water gas shift reaction, and for the removal of carbon monoxide from air at a low reaction temperature via its oxidation reaction are described. Methods of making highly dispersed gold catalysts on washcoated monoliths and the stabilization of monolithic catalyst supports by the addition of a third metal oxide, such as zirconia (ZrO₂), lanthanum oxide (La₂O₃), or manganese oxide (Mn_xO_y). The catalyst supports and/or washcoats may include a variety of transition metal oxides such as alpha iron oxide (α -Fe₂O₃), cerium oxide (CeO₂), ZrO₂, gamma alumina (γ -Al₂O₃), or their combinations.