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Regensburg 2019 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 33: Solid-Liquid Interfaces III

O 33.8: Vortrag

Dienstag, 2. April 2019, 15:45–16:00, H10

Two-dimensional Polymer Structures for Energy Conversion — •Patrick Alexa1, Doris Grumelli2, Juan Lombardi3, Paula Abufager3, Heriberto Busnengo3, Vijay Vyas1, Frederik Haase1, Bettina Lotsch1,4, Rico Gutzler1, and Klaus Kern1,51Max Planck Institute for Solid State Research, Stuttgart, Germany — 2Universidad Nacional de La Plata, Argentina — 3Universidad Nacional de Rosario, Argentina — 4University of Munich (LMU), Germany — 5Ecole Polytéchnique Fédérale de Lausanne, Switzerland

During the last decade the necessity for clean and renewable energy sources has driven societal and political agendas. Progress in energy conversion chemistry can be achieved by the utilization of tailored nanomaterials created in a bottom-up approach, for example when used as efficient electrocatalysts. In this work we investigate two-dimensional networks for their propensity for the hydrogen evolution reaction. In particular, we synthesize two-dimensional polymers with varying amount of nitrogen heteroatoms on Au(111) and visualize their topography by scanning tunneling microscopy. The polymer decorated surface shows promising enhancement effects for the catalytic activity of the hydrogen evolution reaction. The influence of the electrochemical conditions on the organic structure is discussed as well as the varying nitrogen content on electrocatalytic activity. The experimental and theoretical results highlight the capability of single-layer functional two-dimensional polymers for electrocatalysis and provide a molecular picture that explains increased catalytical activity.

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