Prologue The rich scientific heritage of Dangsheng Su contains as substantial fraction his contributions to the field of catalysis with nanostructured carbon materials.Coming from microstructural analysis it became qu...Prologue The rich scientific heritage of Dangsheng Su contains as substantial fraction his contributions to the field of catalysis with nanostructured carbon materials.Coming from microstructural analysis it became quickly clear that the richness of morphological and hence surface electronic variations in this class of materials should be suitable for the development of a science base for heterogeneous catalysis.展开更多
Vibrational analysis of oxygen adsorption on the Cs and CO coadsorbate precovered Ru(0001)surface was carried out by means of high-resolution electron energy loss spectroscopy.For submonolayer Cs coverages on Ru(0001)...Vibrational analysis of oxygen adsorption on the Cs and CO coadsorbate precovered Ru(0001)surface was carried out by means of high-resolution electron energy loss spectroscopy.For submonolayer Cs coverages on Ru(0001)j an appropriate amount of CO adsorption leads to formation of(2x2)-Cs+2CO islands.Subsequent oxygen adsorption on this Cs and CO coadsorbate precovered surface results in a remarkable change of high-resolution electron energy loss spectroscopy.The loss peak of C-O stretch mode for 2x2 island species decreases in intensity,which is accompanied by appearance of new bands at about 87 and 240 meV.The results show that Cs adatoms and CO molecules are rearranged upon oxygen adsorption,and are correlated with coexistence of bare surface CO and a mixed phase of Cs,CO,and O.展开更多
文摘Prologue The rich scientific heritage of Dangsheng Su contains as substantial fraction his contributions to the field of catalysis with nanostructured carbon materials.Coming from microstructural analysis it became quickly clear that the richness of morphological and hence surface electronic variations in this class of materials should be suitable for the development of a science base for heterogeneous catalysis.
基金Supported in part by the National Natural Science Foundation of China under Grand No.19774047.
文摘Vibrational analysis of oxygen adsorption on the Cs and CO coadsorbate precovered Ru(0001)surface was carried out by means of high-resolution electron energy loss spectroscopy.For submonolayer Cs coverages on Ru(0001)j an appropriate amount of CO adsorption leads to formation of(2x2)-Cs+2CO islands.Subsequent oxygen adsorption on this Cs and CO coadsorbate precovered surface results in a remarkable change of high-resolution electron energy loss spectroscopy.The loss peak of C-O stretch mode for 2x2 island species decreases in intensity,which is accompanied by appearance of new bands at about 87 and 240 meV.The results show that Cs adatoms and CO molecules are rearranged upon oxygen adsorption,and are correlated with coexistence of bare surface CO and a mixed phase of Cs,CO,and O.
