%0 Journal Article %1 Lemire2004 %A Lemire, C. %A Meyer, R. %A Henrich, V.E. %A Shaikhutdinov, Sh. %A Freund, H.-J. %D 2004 %J Surf. Sci. %K Iron oxide, science} {surface %N 1 %P 103 - 114 %R DOI: 10.1016/j.susc.2004.08.033 %T The surface structure of Fe3O4(1�1�1) films as studied by CO adsorption %U http://www.sciencedirect.com/science/article/B6TVX-4D97W6M-1/2/9824049947f6719a1ebbe4d690e00659 %V 572 %X We have studied adsorption of CO on Fe3O4(1�1�1) films grown on a Pt(1�1�1) substrate by temperature programmed desorption (TPD), infrared reflection absorption spectroscopy (IRAS) and high resolution electron energy loss spectroscopy (HREELS). Three adsorption states are observed, from which CO desorbs at ~110, 180, and 230�K. CO adsorbed in these states exhibits stretching frequencies at ~2115-2140, 2080 and 2207�cm-1, respectively. The adsorption results are discussed in terms of different structural models previously reported. We suggest that the Fe3O4(1�1�1) surface is terminated by 1/2�ML of iron, with an outermost 1/4�ML consisting of octahedral Fe2+ cations situated above an 1/4�ML of tetrahedral Fe3+ ions, in agreement with previous theoretical calculations. The most strongly bound CO is assigned to adsorption to Fe3+ cations present on the step edges.

@article{Lemire2004, abstract = {We have studied adsorption of CO on Fe3O4(1�1�1) films grown on a Pt(1�1�1) substrate by temperature programmed desorption (TPD), infrared reflection absorption spectroscopy (IRAS) and high resolution electron energy loss spectroscopy (HREELS). Three adsorption states are observed, from which CO desorbs at ~110, 180, and 230�K. CO adsorbed in these states exhibits stretching frequencies at ~2115-2140, 2080 and 2207�cm-1, respectively. The adsorption results are discussed in terms of different structural models previously reported. We suggest that the Fe3O4(1�1�1) surface is terminated by 1/2�ML of iron, with an outermost 1/4�ML consisting of octahedral Fe2+ cations situated above an 1/4�ML of tetrahedral Fe3+ ions, in agreement with previous theoretical calculations. The most strongly bound CO is assigned to adsorption to Fe3+ cations present on the step edges.}, added-at = {2009-10-30T10:04:05.000+0100}, author = {Lemire, C. and Meyer, R. and Henrich, V.E. and Shaikhutdinov, Sh. and Freund, H.-J.}, biburl = {https://www.bibsonomy.org/bibtex/2bf34022254bd7a9a18d631c3904e1e13/jfischer}, doi = {DOI: 10.1016/j.susc.2004.08.033}, interhash = {8bb095d6deee9a09bd0f70bade777864}, intrahash = {bf34022254bd7a9a18d631c3904e1e13}, issn = {0039-6028}, journal = {Surf. Sci.}, keywords = {Iron oxide, science} {surface}, number = 1, pages = {103 - 114}, timestamp = {2009-10-30T10:04:16.000+0100}, title = {The surface structure of Fe3O4(1�1�1) films as studied by CO adsorption}, url = {http://www.sciencedirect.com/science/article/B6TVX-4D97W6M-1/2/9824049947f6719a1ebbe4d690e00659}, volume = 572, year = 2004 }