Dr. Thomas Hartman

Education Development Officer
Employed since: October 2014
Phone: +31 6 22736372
Email: T.Hartman@uu.nl
Room: 4.88

Research

Research

Development of surface-enhanced Raman spectroscopy techniques for the study of surface reactions over heterogeneous catalysts

Supervisor: Prof. dr. ir. Bert M. Weckhuysen

In this work, plasmonic nanostructures are implemented to make Raman spectroscopy into a surface-sensitive technique for the study of adsorbates on a catalyst surface. In particular, Au and Ag nanoparticles are isolated with SiO­2 and TiO2 coatings to obtain thermally Raman signal enhancers.[1] This technique is referred to as shell-isolated nanoparticle-enhanced Raman spectroscopy (SHINERS).[2] Solid metals are assembled over the shell-isolated nanoparticles by wet-impregnation and spark-ablation for the study of hydrogenation catalysis.[3]

 

Figure 1: (Top) Synthesis of SHINERS as a support material for catalysts, starting from bare gold nanoparticles, coated with an oxide layer and subsequently fixing catalyst particles on the surface. (Bottom) SHINERS used to study the Fischer-Tropsch process in realistic reaction conditions [3]

[1] T. Hartman, C. S. Wondergem, N. Kumar, A. Van Den Berg, B. M. Weckhuysen, J. Phys. Chem. Lett. 2016, 7, 1570–1584.

[2] J. F. Li, Y. F. Huang, Y. Ding, Z. L. Yang, S. B. Li, X. S. Zhou, F. R. Fan, W. Zhang, Z. Y. Zhou, D. Y. Wu, B. Ren, Z. L. Wang, Z. Q. Tian, Nature 2010, 464, 392–395.

[3] T. Hartman, B. M. Weckhuysen, Chem. Eur. J. 2018, 24, 3733–3741

C.V.

Publications