摘要
研究了以羰基簇为前体制备的Ｒｕ－Ｆｅ－ＺｒＯ２双金属催化剂上的ＣＯ吸脱附行为及其表面加氢反应．吸附在由Ｒｕ３（ＣＯ）１２－Ｆｅ２（ＣＯ）９混合簇为前体制备的Ｒｕ－Ｆｅ－ＺｒＯ２双金属催化剂上的ＣＯ红外光谱表明，ＣＯ以线型吸附为主，Ｒｕ／Ｆｅ原子比为１∶２者出现弱桥式带；高分散Ｒｕ－Ｆｅ－ＺｒＯ２双金属催化剂在一定条件下的还原作用使其ＣＯ吸附能力增强．以Ｒｕ２Ｆｅ（ＣＯ）１２异核簇、Ｒｕ３（ＣＯ）１２－Ｆｅ２（ＣＯ）９混合簇为前体的Ｒｕ－Ｆｅ－ＺｒＯ２催化剂在ＣＯ加氢反应中出现－ＣＨ３、－ＣＨ２等中间表面物种．
The adsorption desorption and the surface hydrogenation of CO on supported Ru Fe using carbonyl clusters as precursors have been studied by in situ IR spectroscopy. When CO was adsorbed on the Ru Fe catalysts prepared from Ru 3(CO) 12 Fe 2(CO) 9 carbonyl clusters supported on ZrO 2,the most of IR spectroscopy were linear bands; however,some bridged ones appeared while the Ru 3(CO) 12 Fe 2(CO) 9 mixed clusters with Ru/Fe atom ratio 1∶2 . -CH 3 and -CH 2 surface species are inferred during the surface hydrogenation of CO on dispersed Ru Fe bimetallic catalysts according to some C-H stretching frequencies.
基金
国家自然科学基金
关键词
催化剂
CO
吸脱附
红外光谱
加氢反应
表面物种
supported Ru Fe catalyst
CO adsorption desorption
IR spectroscopy
CO hydrogenation
surface species
