机构地区: 西北师范大学化学化工学院
出 处: 《西北师范大学学报(自然科学版)》 2003年第3期45-48,共4页
摘 要: 结合FKN模型研究了卤素F-,Cl-,I-离子对以铈催化的B Z振荡反应的影响机理,结果表明,F-,Cl-,I-对B Z反应体系有显著的抑制作用,但它们对B Z反应的影响机理各不相同.F-与反应体系中的Ce3+反应生成CeF3(Ksp=8 0×10-16)对反应产生抑制作用,Cl-,I-则与反应的中间体(HOBr或HBrO2)反应干扰振荡行为. Combining the mechanism from the classical FKN mechanism the effect of F-,Cl- and I- on the BZ oscillating chemical reaction has been investigated.The effect shows that F-,Cl- and I- can inhibit the BZ oscillating reaction,respectively,while the mechanism is different from each other.F- combined with Ce3+ to form CeF3(Ksp=80×10-16),thus inhibiting the oscillating reaction;Cl- and I- also can dampen the oscillation because they react with HOBr or HBrO2.