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The 122nd AMCP Open Seminar

Fundamental studies on the influence of defects and coadsorbates on adsorption of H2O and H2 on platinum

Schedules 2018.04.11 Finished


Date & Time

Wed., April 11, 2018, 10:00-11:00

Venue

National Institute for Materials Science (NIMS)
Sengen Main Bldg. 8F Middle Seminar Room  → access

Registration

Pre-registration is not required.
For inquiries, please contact the Administrative Office.
This lecture is open to the public. Your participation is strongly encouraged.

Speaker

Prof. Ludo B.F. Juurlink (Leiden Institute of Chemistry , Leiden University)

Title

Fundamental studies on the influence of defects and coadsorbates on adsorption of H2O and H2 on platinum

Abstract

Defects have been known to alter the chemical reactivity of surfaces [1, 2]. While theoretical studies predict trends [3], systematic experimental studies for nanostructured surfaces are sparse.

To start, I review our results on the influence of surface structure on the adsorption of H2O on platinum obtained using a series of Pt single crystals. I discuss how the two most common step types influence the adsorption of water and address how Hads and Oads alter the interaction.

Subsequently, I discuss how curved single crystal surfaces allow for probing the influence of different types of defects with a continuous variation of defect density. We use STM and LEED, AES, TPD, RAIRS, and SMB techniques to study them with varying degrees of spatial resolution[4]. I show how it allows us to unravel fundamental problems in catalysis using H2 dissociation on platinum [5-6] as an example.

References
[1] S.L. Rernasek, W.J. Siekhaus and G.A. Somorjai, Phys.Rev.Lett. 30, 1202 (1973)
[2] L. Vattuonea, L. Savioa, Ma.Rocca, Surf. Sci. Rep. 63, 101 (2008)
[3] J.K. Norskov et al. J. Catal. 209, 275 (2002)
[4] C. Hahn et al. J. Chem. Phys. 136, 114201 (2012); Mom et al., Surf. Sci. 615, 015 (2013); Janlamool et al., Molecules 19, 10845 (2014); Walsh et al., J. Vac. Sci. Technol A 35, 03E102 (2017)
[5] B. Poelsema, K. Lenz, and G. Comsa, J. Chem. Phys. 134, 074703 (2011); ibid. J. Phys. Condens. Matter 22, 304006 (2010).
[6] A. T. Gee et al., J. Phys. Chem. 112, 7660 (2000); D.A. McCormack et al. J. Chem. Phys. 122, 194708 (2005); I.M.N. Groot et al. J. Phys. Chem. C 117, 9266 (2013)

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Summary

Event Title
The 122nd AMCP Open Seminar
Fundamental studies on the influence of defects and coadsorbates on adsorption of H2O and H2 on platinum
Venue
National Institute for Materials Science (NIMS)
Sengen Main Bldg. 8F Middle Seminar Room
Schedules Hours
2018.04.11
10:00~11:00
Registration Fee
Free

Contact

Research Center for Advanced Measurement and Characterization Administrative Office
National Institute for Materials Science
1-2-1 Sengen, Tsukuba, Ibaraki, 305-0047, Japan
Tel:81-29-859-3861
Fax:81-29-859-2801
E-Mail: amc=ml.nims.go.jp(Please change "=" to "@")
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National Institute for Materials Science (NIMS)
1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, JAPAN
TEL.+81-(0)-29-859-2000
FAX.+81-(0)-29-859-2029