CuCl_2/NaY体系加热单层分散态的程序升温还原研究

Studies on state of monolayer dispersion for CuCl_2/NaY system by TPR

通过对加热单层分散和离子交换两种方法制得的样品的研究表明 ,二者中Cu2 + 的状态是不同的 .在加热分散样品中 ,阈值之前的样品有两个还原峰 ,分别为 5 0 0K和 716K ,而离子交换法所得的CuY的还原峰对应温度为 4 81K和 5 86K .实验结果证明 ,在单层分散得到的样品中 ,把Cu2 + 还原为零价比离子交换法的样品困难得多 .因此 。

It is indicated the appearance of samples prepared by Monolayer dispersion and Ion exchange are different.In sample prepared by Monolayer dispersion,the two peaks of reducing are found at 500K and 716K,while two peaks of reducing at 481K and 586K in sample prepared by Ion exchange.In sample prepared by Monolayer dispersion to reduce the copper to zero is more difficult than that in sample prepared by ion exchange.So the catalytic active of catalyst obtained by this way are probably very different from the catalytic obtained by Ion exchange.