【摘要】 使用2,4-二羟基苯甲酸（DHBA）辅助控制合成出具有不同形貌（棒状与片状）的碱式碳酸铈。在水热阶段,碱式碳酸铈的形貌可以通过DHBA的量进行调控。当DHBA为3.5 mmol时,得到棒状碱式碳酸铈,然而增加DHBA的量至5.0 mmol时,可形成片状碱式碳酸铈。棒状与片状fcc-Ce O₂（面心立方二氧化铈）可成功地通过相应的焙烧处理获得。所得二氧化铈均有较大的比表面积(>60 m²·g^-1),然而与片状二氧化铈相比,棒状二氧化铈有更高的氧化还原能力与更多的酸量。棒状二氧化铈用于NH₃-SCR时有着更好的催化活性。更多还原

【Abstract】 Different morphologies（rod-like and sheet-like） of Ce OHCO₃ were controllably synthesized by using 2,4-dihydroxybenzonic acid（DHBA） as auxiliary. During the hydrothermal process, the morphologies of CeOHCO₃ were controlled by adding different amount of DHBA. When the amount of DHBA was 3.5 mmol, rod-like Ce OHCO₃ was synthesized, while by increasing the amount of DHBA to 5.0 mmol, the sheet-like Ce OHCO₃ was relatively generated. Then the rod-like and sheet-like fcc-CeO₂（face-centered cubic-CeO₂） were successfully obtained by the subsequent calcination procedure. The resulted CeO₂ affords large surface area(> 60 m2·g^-1),while the rod-like CeO₂ exhibits higher redox ability and more acid amount compared to those of sheet-like CeO₂.In addition, the rod-like CeO₂ exhibits better catalytic activity in NH₃-SCR.更多还原