中南民族大学学报(自然科学版)
中南民族大學學報(自然科學版)
중남민족대학학보(자연과학판)
JOURNAL OF SOUTH-CENTRAL UNIVERSITY FOR NATIONALITIES(NATURAL SCIENCE EDITION)
2013年
3期
1-4
,共4页
李金林%杨武%张煜华%赵福真
李金林%楊武%張煜華%趙福真
리금림%양무%장욱화%조복진
钙钛矿型催化剂%铈掺杂%一氧化碳%催化氧化%有序介孔硅材料
鈣鈦礦型催化劑%鈰摻雜%一氧化碳%催化氧化%有序介孔硅材料
개태광형최화제%시참잡%일양화탄%최화양화%유서개공규재료
perovskite type catalyst%Ce dopant%CO%catalytic oxidation%SBA-15
采用原位水热合成法合成了La1-xCexCoO3/SBA-15(x=0.05,0.1,0.15,0.2,0.25,摩尔分数,下同)催化剂,并采用X射线粉末衍射(XRD)、透射电子显微镜(TEM)、N2物理吸附-脱附表征仪(BET)和程序升温还原(H2-TPR)等表征手段对催化剂的结构进行了研究.结果表明:Ce掺杂对催化剂的结构和CO催化氧化性能有较大的影响.在Ce掺杂部分取代La之后,催化剂形成了La1-x Cex CoO3钙钛矿相,CeO2和Co3 O4物相;当Ce的掺杂量为x=0.2时,催化剂的CO催化氧化活性最高.
採用原位水熱閤成法閤成瞭La1-xCexCoO3/SBA-15(x=0.05,0.1,0.15,0.2,0.25,摩爾分數,下同)催化劑,併採用X射線粉末衍射(XRD)、透射電子顯微鏡(TEM)、N2物理吸附-脫附錶徵儀(BET)和程序升溫還原(H2-TPR)等錶徵手段對催化劑的結構進行瞭研究.結果錶明:Ce摻雜對催化劑的結構和CO催化氧化性能有較大的影響.在Ce摻雜部分取代La之後,催化劑形成瞭La1-x Cex CoO3鈣鈦礦相,CeO2和Co3 O4物相;噹Ce的摻雜量為x=0.2時,催化劑的CO催化氧化活性最高.
채용원위수열합성법합성료La1-xCexCoO3/SBA-15(x=0.05,0.1,0.15,0.2,0.25,마이분수,하동)최화제,병채용X사선분말연사(XRD)、투사전자현미경(TEM)、N2물리흡부-탈부표정의(BET)화정서승온환원(H2-TPR)등표정수단대최화제적결구진행료연구.결과표명:Ce참잡대최화제적결구화CO최화양화성능유교대적영향.재Ce참잡부분취대La지후,최화제형성료La1-x Cex CoO3개태광상,CeO2화Co3 O4물상;당Ce적참잡량위x=0.2시,최화제적CO최화양화활성최고.
The mesoporous perovskite catalysts La1-xCexCoO3/SBA-15(x=0.05,0.1,0.15,0.2,0.25, molar fraction) were synthesized by in-situ hydeothermal method.The X-ray diffraction, TEM, N2 physisorption and H2-TPR were used to investigate the catalyst structure .The results showed that Ce doping had great influence on the structure of catalyst and CO catalytic oxidation.When La was substituted by Ce in the calatyst the La 1-xCexCoO3,CeO2 and Co3O4 phases were formed. The catalyst with doping molar fraction x=0.2 showed the highest CO activity of catalysis and oxidation .