研究了稀土元素对高分子负载Pt催化剂催化氢化氯代硝基苯反应的影响。结果表明:稀土元素的存在抑制了氯代硝基苯加氢反应活性,对产物氯代苯胺的选择性有不同程度的提高;碱NaOH存在时,PVP Pr Pt给出了90.8%的邻氯苯胺选择性,使用PVP La P...研究了稀土元素对高分子负载Pt催化剂催化氢化氯代硝基苯反应的影响。结果表明:稀土元素的存在抑制了氯代硝基苯加氢反应活性,对产物氯代苯胺的选择性有不同程度的提高;碱NaOH存在时,PVP Pr Pt给出了90.8%的邻氯苯胺选择性,使用PVP La Pt时得到97 2%的间氯苯胺选择性,PVP Ce Pt催化体系获得了98.2%的对氯苯胺选择性。展开更多
The effect of rare earths （Sm, Pr, Ce, Nd and La） on the hydrogenation properties ofp-chloronitrobenzene （CNB） over Pt/CNTs catalyst was studied in ethanol at 303 K and normal pressure. The results exhibited that ...The effect of rare earths （Sm, Pr, Ce, Nd and La） on the hydrogenation properties ofp-chloronitrobenzene （CNB） over Pt/CNTs catalyst was studied in ethanol at 303 K and normal pressure. The results exhibited that the hydrogenation of p-CNB could be carried out over PtMOx/CNTs catalysts. Both catalytic activities and yields ofp-chloroaniline （CAN） were all improved. PtCeOx/ CNTs catalyst exhibited the best catalytic activity （TOF was 0.47 s^-1） and the highest yield of p-CAN （97.5 mol%）. PtCeOx/CNTs （1.0 wt%） catalyst exhibited good stability on the hydrogenation of p-CNB.展开更多
文摘研究了稀土元素对高分子负载Pt催化剂催化氢化氯代硝基苯反应的影响。结果表明:稀土元素的存在抑制了氯代硝基苯加氢反应活性,对产物氯代苯胺的选择性有不同程度的提高;碱NaOH存在时,PVP Pr Pt给出了90.8%的邻氯苯胺选择性,使用PVP La Pt时得到97 2%的间氯苯胺选择性,PVP Ce Pt催化体系获得了98.2%的对氯苯胺选择性。
文摘The effect of rare earths （Sm, Pr, Ce, Nd and La） on the hydrogenation properties ofp-chloronitrobenzene （CNB） over Pt/CNTs catalyst was studied in ethanol at 303 K and normal pressure. The results exhibited that the hydrogenation of p-CNB could be carried out over PtMOx/CNTs catalysts. Both catalytic activities and yields ofp-chloroaniline （CAN） were all improved. PtCeOx/ CNTs catalyst exhibited the best catalytic activity （TOF was 0.47 s^-1） and the highest yield of p-CAN （97.5 mol%）. PtCeOx/CNTs （1.0 wt%） catalyst exhibited good stability on the hydrogenation of p-CNB.
