Berlin 2018 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 17: Solid-liquid interfaces: Reactions and electrochemisty I (joint session O/CPP)
O 17.6: Vortrag
Montag, 12. März 2018, 16:15–16:30, MA 144
On-surface synthesis of covalent architectures for energy conversion chemistry — •Patrick Alexa1, Doris Grumelli2, Diana Hötger1, Vjay Vias3, Bettina Lotsch1,4, Rico Gutzler1, and Klaus Kern1,5 — 1Max Planck Institute for Solid State Research, 70569 Stuttgart, Germany — 2Universidad Nacional de La Plata, 1900 La Plata, Argentina — 3Marquette University, Milwaukee, WI 53233, USA — 4University of Munich (LMU), 81377 Munich, Germany — 5Ecole Polytéchnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
Creating nanostructures in a bottom-up approach by using molecular precursors allows for the fabrication of tailored nanomaterials for specific applications such as energy conversion. In particular (metal)organic networks synthesized in UHV on crystalline surfaces can be used as efficient electrocatalysts. Inspired by the photocatalytic hydrogen evolution properties of triazine-containing bulk covalent organic frameworks, we investigate structurally similar 2D networks for their propensity for the hydrogen evolution reaction. In this work we synthesize two-dimensional covalent polymers from 2,4,6-tri-(4-bromophenyl)-1,3,5-triazine on Au(111) and visualize their topography by scanning tunneling microscopy. The polymer-decorated surface shows a promising improvement for the hydrogen evolution reaction compared to bare Au(111) in electrocatalytic experiments. The influence of electrolyte exposure and electrocatalytic conditions on the polymer structure is discussed. These results highlight the capability of single-layer functional 2D polymers for electrocatalysis.