Work performed on beamline X18B

Carbon MWNT supported Pt catalysts; X. Wang, N. Li, L. Pfefferle, G. Haller Yale University, Department of Chemical Engineering.

X. Wang, N. Li, J.A. Webb, L.D. Pfefferle and G.L. Haller, Effect of surface oxygen containing groups on the catalytic activity of multi-walled carbon nanotube supported Pt catalyst in press, Applied Catalysis B: Environmental, 2010.

2-5nm Pt particles outside MWNT (left)And inside MWNT (right)

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Pt outside Pt inside Pt ref

•Carbon Multiwalled nanotubes (MWNT) allow stabilization of nm-sized Pt or Co particles for catalytic applications.

•Binding energy changes for Pt particles inside (blue) and outside (red) the MWNT. Pt metal foil reference in black (see figure below).

•This allows tuning of catalytic reactivity and selectivity (e.g. Wang et al. 2010).

X18B