SKM 2023 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 39: Poster Session: Heterogeneous Catalysis and Surface Dynamics

O 39.1: Poster

Dienstag, 28. März 2023, 18:00–20:00, P2/EG

SURMOF ZIF-67 Thin Films for Catalytic Water Oxidation Reaction — •Jimin Song, Alexei Nefedov, Stefan Heissler, Christof Wöll, and Yuemin Wang — Institute of Functional Interfaces, Karlsruhe Institute of Technology, 76344, Eggenstein-Leopoldshafen, Germany

Metal-organic frameworks emerged as promising electrocatalysts to tackle urgent energy and environmental problems. Surface-coordinated MOF thin films (SURMOFs) were grown via a liquid phase epitaxial layer-by-layer method, endowed with precisely controlled thickness, preferred growth orientation and highly-ordered surface. For the first time, high-quality crystalline ZIF-67 SURMOF thin films were fabricated and employed in water oxidation reaction (OER). The transformation from ZIF-67 to CoOOH was observed after the water oxidation reaction by applying IRRAS, Raman and XPS measurements. Meantime, the thickness of the thin film decreased from 100 nm to 20 nm. The overpotential was reduced from 468 to 375 mA/cm2 by doping with boron and nickel.