Ceria (CeO₂) with different crystal-planes were used as supports to synthesize gold (Au)/CeO₂ catalysts for the preferential oxidation of carbon monoxide (CO). A CeO₂ morphology-dependent Au-CeO₂ interaction was observed. Au/CeO₂-R in this present work performed the outstanding activity at lower temperature than ever since other works were reported. The Au catalyst supported on rod-shaped CeO₂ exhibited the highest CO conversion level of 97.9% at 30 °C, followed by that on polyhedral- (94.0%), cube- (74.0%) and octahedral- (27.7%) shaped CeO₂. The catalytic activities were strongly affected by the CeO₂ crystal-planes and Au active species. The rod-shaped CeO₂ enclosed by (1 1 0) and (1 0 0) planes might interact strongly with Au species, generating the most accessible active sites to absorb/desorb and activate the CO and oxygen molecules. The octahedral-shaped CeO₂ enclosed by the (1 1 1) plane had the lowest catalytic activity since the (1 1 1) plane is the most stable and irreducible of the CeO₂ (1 1 1), (1 0 0) and (1 1 0) planes, accounting for its decreased catalytic activity.

使用具有不同晶面的二氧化铈（CeO ₂）作为载体来合成金（Au）/ CeO ₂催化剂，以优先氧化一氧化碳（CO）。观察到CeO ₂形态依赖的Au-CeO ₂相互作用。自从报道了其他工作以来，该当前工作中的Au / CeO ₂ -R在较低的温度下表现出出色的活性。负载在棒状CeO ₂上的Au催化剂在30°C时表现出最高的CO转化率97.9％，其次是在多面体（94.0％），立方（74.0％）和八面体（27.7％）的CeO上₂。催化活性受到CeO _2的强烈影响晶面和金活性物质。被（1 1 0）和（1 0 0）平面包围的棒状CeO ₂可能与Au物种强烈相互作用，从而生成最易于接近的活性位，以吸收/解吸并激活CO和氧分子。由（1 1 1）平面包围的八面体形状的CeO ₂具有最低的催化活性，因为（1 1 1）平面是CeO ₂（1 1 1），（1 0 0）和（1 1 0）平面，说明其催化活性降低。