摘要
利用TP-IR(程温-红外)动态方法研究了由Rh_4(CO)_(12)衍生的Rh_4/Al_2O_3上H_2对CO吸附类型的影响。结果表明,室温CO和H_2共吸附,在Rh^I中心上导致2050cm^(-1)谱带出现,归属为;在线式中心上导致2006cm^(-1)谱带出现,归属为;在桥式中心上,在 流动的H_2中CO气相不存在)则导致生成。
Effect of H2 adsorption on the types of CO adsorption over Rh4/ A12O3 derived from Rh4(CO)12 has been studied in detail by using TP-IR dynamic method. It was found that at room temperature the co-adsorption of CO and H2 on Rh1 sites leads to the appearance of the band at 2050cm-1, which is attributed to the formation of HRh1-CO5 on linear sites the appearance of the band at 2006 cm-1 is attributed to the formation of HRh-CO; on bridge sites in H2 flow the appearance of theband at 1797cm-1 is attributed to the formation of . During TPin CO and H2(or in H2 flow),the transformation of HRh1-CO to HxRh1 -CO on Rh1 sites and HRh-CO to H0Rh-CO on linear sites occur.
基金
中国科学院大连化学物理研究所催化基础研究国家重点实验室基金
国家自然科学基金
