CAJ | 학술논문

在离子液体1-丁基-3-甲基咪唑四氟硼酸盐([bmim]BF4)-水混合介质中,以 NaBH4为还原剂制备了 Ru-[bmim]BF4催化剂,并用于苯选择加氢反应.结果表明,相对于 N2H4·H2O 还原制备的催化剂,本催化剂具有明显较高的环己烯选择性,当苯转化率为49.5%时,环己烯选择性可达34.1%,这是由于硼的作用所致.重复使用时,由于离子液体的流失,暴露的 Ru 活性中心增多,因而苯转化率升高,但环己烯选择性下降,同时生成了 ZnOHF.这是离子液体中 F–与 ZnSO4反应而得;并且在离子液体的模板作用下, ZnOHF 沿着(001)方向生长,从而形成了一维棒状形貌.
재리자액체1-정기-3-갑기미서사불붕산염([bmim]BF4)-수혼합개질중,이 NaBH4위환원제제비료 Ru-[bmim]BF4최화제,병용우분선택가경반응.결과표명,상대우 N2H4·H2O 환원제비적최화제,본최화제구유명현교고적배기희선택성,당분전화솔위49.5%시,배기희선택성가체34.1%,저시유우붕적작용소치.중복사용시,유우리자액체적류실,폭로적 Ru 활성중심증다,인이분전화솔승고,단배기희선택성하강,동시생성료 ZnOHF.저시리자액체중 F–여 ZnSO4반응이득;병차재리자액체적모판작용하, ZnOHF 연착(001)방향생장,종이형성료일유봉상형모.
A Ru-[bmim]BF4 catalyst was prepared in a mixture of the ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate ([bmim]BF4) and H2O using NaBH4 as a reducing agent. The Ru-[bmim]BF4 catalyst showed higher selectivity for cyclohexene than a cata-lyst reduced by N2H4·H2O because of the influence of boron. When Ru-[bmim]BF4 was reused, higher activity and lower selectivity were obtained because the number of Ru active sites increased through leaching of the ionic liquid. The used catalyst also contained ZnOHF formed in the reaction between F– and ZnSO4, which was an additive in the reaction. Under the influence of the ionic liquid as a template, ZnOHF grew along the (001) direction and exhibited rod-like morphology.