汕头大学学报：自然科学版
汕頭大學學報：自然科學版
산두대학학보：자연과학판
Journal of Shantou University(Natural Science Edition)
2012年
4期
9-16
,共8页
钙钛矿%三效催化剂%溶胶-凝胶法%铬%铜
鈣鈦礦%三效催化劑%溶膠-凝膠法%鉻%銅
개태광%삼효최화제%용효-응효법%락%동
peroviskite%three-way catalyst%sol-gel method%chromium%copper
采用溶胶-凝胶法制备一系列钙钛矿复合氧化物La0.9Mg0.1Cr1-xMxO3（M为Fe、Cu和Ni），并考察其催化性能．同时利用扫描电子显微镜和x射线衍射等分析方法，表征催化剂性能与结构之间的关系．实验结果表明：750℃焙烧制得的La0,9Mg0,1Cr1-xMxO3具有良好的三效催化性能，在该催化剂上C3H6、CO和NO的起燃温度T50较低，分别为229℃、202℃和286℃；完全转化温度‰分别为325℃、247℃和348℃；500℃转化率分别高达91．1％、99．3％和93．9％．La0.9Mg0.1Cr1-xMxO3具有良好的钙钛矿晶体结构，晶粒为纳米级，热稳定性高，所以催化性能良好．
採用溶膠-凝膠法製備一繫列鈣鈦礦複閤氧化物La0.9Mg0.1Cr1-xMxO3（M為Fe、Cu和Ni），併攷察其催化性能．同時利用掃描電子顯微鏡和x射線衍射等分析方法，錶徵催化劑性能與結構之間的關繫．實驗結果錶明：750℃焙燒製得的La0,9Mg0,1Cr1-xMxO3具有良好的三效催化性能，在該催化劑上C3H6、CO和NO的起燃溫度T50較低，分彆為229℃、202℃和286℃；完全轉化溫度‰分彆為325℃、247℃和348℃；500℃轉化率分彆高達91．1％、99．3％和93．9％．La0.9Mg0.1Cr1-xMxO3具有良好的鈣鈦礦晶體結構，晶粒為納米級，熱穩定性高，所以催化性能良好．
채용용효-응효법제비일계렬개태광복합양화물La0.9Mg0.1Cr1-xMxO3（M위Fe、Cu화Ni），병고찰기최화성능．동시이용소묘전자현미경화x사선연사등분석방법，표정최화제성능여결구지간적관계．실험결과표명：750℃배소제득적La0,9Mg0,1Cr1-xMxO3구유량호적삼효최화성능，재해최화제상C3H6、CO화NO적기연온도T50교저，분별위229℃、202℃화286℃；완전전화온도‰분별위325℃、247℃화348℃；500℃전화솔분별고체91．1％、99．3％화93．9％．La0.9Mg0.1Cr1-xMxO3구유량호적개태광정체결구，정립위납미급，열은정성고，소이최화성능량호．
A series of La0.9Mg0.1Cr1-xMxO3(M = Fe, Cu,Ni )perovskite-type mixed oxides were synthesized using sol-gel method and the performance of catalysts was also investigated. The relationship between the catalytic activity and the structure of catalyst was explored by using the X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results showed that the La0.9Mg0.1Cr1-xMxO3 catalyst exhibited high three-way catalytic performance when it was calcined at 750 ℃. Under the function of the catalyst, the Tso of C3H6, CO and NO were 229 ℃, 202 ℃ and 286 ℃; the T9o of C3H6, CO and NO were 325℃, 247℃ and 348 ℃; the conversion efficiency of C3H6, CO and NO were 91.1%, 99.3% and 93.9% respectively at 500 ℃. The La0.9Mg0.1Cr1-xMxO3 catalyst had good perovskite-type crystal structure and its grain was nanocrystal, and it showed excellent thermal stabilities and good catalytic property.
