【摘要】 用程序升温表面反应（TPSR）和程序升温还原（TPR）以及过渡应答（TR）等动态手段研究Ni/Al₂O₃催化剂表面上CO氢化反应的活性位状况。结果表明,催化剂表面存在两种类型的活性位。其中A位来自表面上的聚晶体Ni,B位来自Ni与载体Al₂O₃强相互作用形成的Ni-Al化合物。实验结果还表明,CO在两个活性位都有吸附,但在有H₂参与的条件下,会影响二个活性位上的CO吸附量。更多还原

【Abstract】 The state of surface site of catalyst for CO hydrogenation was studied with TPSR, TPR and TR. Results show that there are two kinds of active sites on the surface ofNi/Al₂O₃ catalysts. The site A comes from crystallite of Ni exposed on the surface,while the site B comes from Ni-Al intermediate which formed by the strong interac-tion of Ni with the support Al₂O₃. Results also show that the CO can be adsorbed onboth sites, if active hydrogen is adsorbed on the surface, the ratio of adsorbed COon both sites will be changed.更多还原