Hostname: page-component-cd9895bd7-gvvz8 Total loading time: 0 Render date: 2024-12-28T04:09:29.906Z Has data issue: false hasContentIssue false
  • English
  • Français

Interaction of Oxide Surfaces with Water: Environmental Transmission Electron Microscopy of MgO Hydroxylation

Published online by Cambridge University Press:  15 November 2005

Marija Gajdardziska-Josifovska  and
Renu Sharma
Marija Gajdardziska-Josifovska
Affiliation:
Department of Physics and Laboratory for Surface Studies, University of Wisconsin–Milwaukee, Milwaukee, WI 53201, USA
Renu Sharma
Affiliation:
Center for Solid State Science, Arizona State University, Tempe, AZ 85287, USA
Get access

Abstract

Environmental transmission electron microscopy (ETEM) is opening an important window for in situ studies of interaction of water with oxides. Studies of MgO smoke nanocrystals under partial pressures of water ranging from 10 mTorr to 10 Torr found their {100} neutral surfaces to be extremely resistant to dissociative adsorption of water and hydroxylation, in agreement with recent theoretical predictions. ETEM observations of electron irradiation driven MgO smoke nanocrystal hydroxylation displayed the anticipated volume expansion, but revealed complex shape changes with elongations toward oxide corners. The reaction rate was found to increase with electron flux at constant water pressure. In situ selected area diffraction studies of MgO single crystals showed that the hydroxide grows with its basal (0001) plane parallel to the polar MgO (111) planes. This is the same crystallographic relationship as in dehydroxylation experiments, but with four variants. Electron energy loss spectroscopy found oxygen K-edge changes consistent with bulk hydroxylation.

Keywords

ETEMMgOMg(OH)2hydroxylationin situ
Type
Materials Applications
Information
Microscopy and Microanalysis , Volume 11 , Issue 6 , December 2005 , pp. 524 - 533
Copyright
© 2005 Microscopy Society of America

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Abriou, D. & Jupille, J. (1999). Self-inhibition of water dissociation on magnesium oxide surfaces. Surf Sci 430, L527–532.Google Scholar
Béarat, H., McKelvy, M.J., Chizmeshya, A.V.G., Sharma, R., & Carpenter, R.W. (2002). Magnesium hydroxide dehydroxylation/carbonation reaction processes: Implications for carbon dioxide mineral sequestration. J Am Ceram Soc 85, 742–748.Google Scholar
Dahmen, U., Kim, M.G., & Searcy, A.W. (1987). Microstructural evolution during the decomposition of Mg(OH)2. Ultramicroscopy 23, 365–370.Google Scholar
Egerton, R.F. (1996). Electron Energy-Loss Spectroscopy in the Electron Microscope. New York: Plenum Press.
Eggkvist, O. & Stone, A.J. (1999). Adsorption of water on the MgO(001) surface. Surf Sci 437, 239–248.Google Scholar
Ferry, D., Glebov, A., Senz, V., Suzanne, J., Toennies, J.P., & Weiss, H. (1996). Observation of the second ordered phase of water on the MgO(100) surface: Low energy electron diffraction and helium atom scattering studies. J Chem Phys 105, 1697–1701.Google Scholar
Finocchi, F., Barbier, A., Jupille, J., & Noguera, C. (2004). Stability of rocksalt (111) polar surfaces: Beyond the octopole. Phys Rev Lett 92, Art. No. 136101.Google Scholar
Gajdardziska-Josifovska, M., Crozier, P.A., & Cowley, J.M. (1991). A ([SQUARE ROOT 3] ×[SQUARE ROOT 3])R30° reconstruction on annealed (111) surfaces of MgO. Surf Sci Lett 248, L259–L264.Google Scholar
Gajdardziska-Josifovska, M., Crozier, P.A., McCartney, M.R., & Cowley, J.M. (1993). Ca segregation and step modifications on cleaved and annealed MgO (100) surfaces. Surf Sci 284, 186–199.Google Scholar
Gajdardziska-Josifovska, M., Plass, R., Schofield, M.A., Giese, D.R., & Sharma, R. (2002). In situ and ex situ electron microscopy studies of polar oxide surfaces with rock salt structure. J Electron Microsc 51, S13–S25.Google Scholar
Giordano, L., Goniakowski, J., & Suzanne, J. (1998). Partial dissociation of water molecules in the (3 × 2) water monolayer deposited on the MgO (100) surface. Phys Rev Lett 81, 1271–1273.Google Scholar
Hansen, T.W., Wagner, J.B., Hansen, P.L., Dahl, S., Topsoe, H., & Jacobsen, C.J.H. (2001). Atomic-resolution in situ transmission electron microscopy of a promoter of a heterogeneous catalyst. Science 294, 1508–1510.Google Scholar
Henrich, V.E. & Cox, P.A. (1994). The Surface Science of Metal Oxides. Cambridge, UK: Cambridge University Press.
Jones, C.F., Reeve, R.A., Rigg, R., Segall, R.L., Smart, R. St. C., & Turner, P.S. (1984). Surface area and the mechanism of hydroxylation of ionic oxide surfaces. J Chem Soc Faraday Trans 80, 2609–2617.Google Scholar
Langel, W. & Parrinello, M. (1994). Hydrolysis at stepped MgO surfaces. Phys Rev Lett 73, 504–507.Google Scholar
Langel, W. & Parrinello, M. (1995). Ab-initio molecular-dynamics of H2O adsorbed on solid MgO. J Chem Phys 103, 3240–3252.Google Scholar
Lazarov, V.K., Plass, R., Poon, H.-C., Saldin, D.K., Weinert, M., Chambers, S.A., & Gajdardziska-Josifovska, M. (2005). Structure of the hydrogen stabilized MgO(111)-(1×1) polar surface: Integrated experimental and theoretical studies. Phys Rev B 71, 115434 (1–9).Google Scholar
Liu, P., Kendelewicz, T., & Brown, G.E., Jr. (1998a). Reaction of water with MgO(100) surfaces. Part II: Synchrotron photoemission studies of defective surfaces. Surf Sci 412/413, 315–332.Google Scholar
Liu, P., Kendelewicz, T., Brown, G.E., Jr., & Parks, G.A. (1998b). Reaction of water with MgO(100) surfaces. Part I: Synchrotron X-ray photoemission studies of low-defect surfaces. Surf Sci 412/413, 287–314.Google Scholar
McKelvy, M.J., Sharma, R., Chizmeshya, A.V.G., Carpenter, R.W., & Streib, K. (2001). Magnesium hydroxide dehydroxylation: In situ nanoscale observation of lamellar nucleation and growth. Chem Mater 13, 921–926.Google Scholar
Noguera, C. (1996). Physics and Chemistry at Oxide Surfaces. Cambridge, UK: Cambridge University Press.
Noguera, C. (2000). Polar oxide surfaces. J Phys Condens Matter 12, R367–R410.Google Scholar
Odelius, M. (1999). Mixed molecular and dissociative water adsorption on MgO[100]. Phys Rev Lett 82, 3919–3922.Google Scholar
Plass, R., Egan, K., Collazo-Davila, C., Grozea, D., Landree, E., Marks, L.D., & Gajdardziska-Josifovska, M. (1998). Cyclic ozone identified in magnesium oxide (111) surface reconstructions. Phys Rev Lett 81, 4891–4894.Google Scholar
Refson, K., Wogelius, R.A., & Fraser, D.G. (1995). Water chemisorption and reconstruction of the MgO surface. Phys Rev B 52, 10823–10826.Google Scholar
Russo, S. & Noguera, C. (1992). Acido-basic properties of simple oxide surfaces. 1. Magnesium-oxide. Surf Sci 262, 245–258.Google Scholar
Sharma, R., McKelvy, M.J., Béarat, H., Chizmeshya, A.V.G., & Carpenter, R.W. (2004). In situ observation of nano-materials formation processes during Mg(OH)2 dehydroxylation and rehydroxylation. Philos Mag 84, 2711–2729.Google Scholar
Sharma, R. & Weiss, K. (1998). Development of a TEM to study in situ structural and chemical changes at atomic level during gas solid interaction at elevated temperatures. Micros Res Tech 42, 270–280.Google Scholar
Subramanian, A., Marks, L.D., Warschkow, O., & Ellis, D.E. (2004). Direct observation of charge transfer at a MgO(111) surface. Phys Rev Lett 92, Art. No. 026101.Google Scholar
Tasker, P.W. (1979). The stability of ionic crystal surfaces. J Phys C Solid State Phys 12, 4977–4984.Google Scholar
Wang, Y. & Truong, T.N. (2004). Theoretical study of adsorption of water dimer on the perfect MgO(100) surface: Molecular adsorption versus dissociative chemisorption. J Phys Chem B 11, 3289–3294.Google Scholar