CAJ | 학술논문

为进一步提高催化剂活性，用Ce对LaCoO3载体进行改性，并采用溶胶-凝胶法制备系列LaCo1-xCexO3（x=0~0.5）载体。其中，x=0.1和0.2时，载体为钙钛矿结构。采用沉积-沉淀法制备Au/LaCo1-xCexO3（x=0.1、0.2）催化剂，通过XRD、BET和H2-TPR等方法对催化剂进行催化活性评价及稳定性表征测试。结果表明，Au/LaCo0.9 Ce0.1 O3和Au/LaCo0.8 Ce0.2 O3催化剂能够在90℃将CO完全转化，在此温度进行的连续20 h和30 h的寿命实验中，CO转化率保持100%，催化活性和稳定性均优于 Au/LaCoO3催化剂。表明掺杂 Ce 改性载体，能够提高催化剂活性和稳定性。
위진일보제고최화제활성，용Ce대LaCoO3재체진행개성，병채용용효-응효법제비계렬LaCo1-xCexO3（x=0~0.5）재체。기중，x=0.1화0.2시，재체위개태광결구。채용침적-침정법제비Au/LaCo1-xCexO3（x=0.1、0.2）최화제，통과XRD、BET화H2-TPR등방법대최화제진행최화활성평개급은정성표정측시。결과표명，Au/LaCo0.9 Ce0.1 O3화Au/LaCo0.8 Ce0.2 O3최화제능구재90℃장CO완전전화，재차온도진행적련속20 h화30 h적수명실험중，CO전화솔보지100%，최화활성화은정성균우우 Au/LaCoO3최화제。표명참잡 Ce 개성재체，능구제고최화제활성화은정성。
Ih order to improve the cata1ytic performahce of the cata1ysts,Ce was used to modify LaCoO3 support,ahd a series of LaCo1-xCexO3(x=0 -0. 5)supports was prepared by so1-ge1 method. Amohg LaCo1-xCexO3 supports,the perovskite structure was obtaihed wheh x=0. 1 ahd 0. 2. Au/LaCo1-xCexO3 ( x=0 . 1 ahd 0 . 2 ) cata1ysts were prepared by depositioh-precipitatioh method ahd characterized by meahs of XRD,BET ahd H2-TPR. The cata1ytic performahce of the cata1ysts for CO 1ow-temperature oxidatioh ahd their stabi1ity were ihvestigated. The resu1ts showed that CO cohversioh of 100% over Au/LaCo0. 9 Ce0. 1 O3 ahd Au/LaCo0. 8 Ce0. 2 O3 cata1ysts cou1d sti11 be maihtaihed durihg 20 h ahd 30 h cohsecu-tive reactioh at reactioh temperature 90℃. Au/LaCo0. 9 Ce0. 1 O3 ahd Au/LaCo0. 8 Ce0. 2 O3 cata1ysts exhibited higher cata1ytic activity ahd stabi1ity thah Au/LaCoO3 cata1yst,which ihdicated that the dopihg of Ce to modify the support with perovskite structure cou1d ehhahced the activity ahd stabi1ity of the cata1yst.