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DS: Fachverband Dünne Schichten
DS 13: Layer Deposition II: Deposition Methods
DS 13.4: Vortrag
Montag, 16. März 2020, 17:30–17:45, CHE 89
One-step Synthesis of Carbon-supported Electrocatalysts — •Sebastian Tigges1, Nicolas Wöhrl1, Ivan Radev2, Ulrich Hagemann1,3, Markus Heidelmann1,3, Thai Binh Nguyen1,3, Stanislav Gorelkov2, Stefan Schulz1, and Axel Lorke1 — 1University of Duisburg-Essen and CENIDE, 47057 Duisburg, Germany — 2ZBT GmbH, 47057, Duisburg, Germany — 3University of Duisburg-Essen and ICAN, 47057 Duisburg, Germany
Cost-efficiency, durability and reliability are the main challenges in the commercialization of fuel cells, thus research is focusing on development of new material systems for use in electrocatalysis. Especially long-term stability needs to be improved, since degradation mechanisms lead to a reduced lifetime of conventional catalyst materials. Here, we present a novel, one-step approach to synthesize a metal/carbon-hybrid material by plasma-enhanced chemical vapour deposition, demonstrated for the model electrocatalyst Pt/C. Platinum loading, oxidation state, and particle size distribution of the catalyst can be fully controlled. Highly monodisperse size distributions and small mean particle sizes of the Pt nanoparticles are achieved. Due to the one-step nature of the process, the Pt nanoparticles are embedded into the support (carbon nanowalls), which improves long-term stability, while maintaining good electrochemical surface area. By using different precursors, the versatile synthesis process can be easily adapted to deposit other metal/carbon-hybrids for a variety of potential applications. Control of the functionalization and doping of the catalyst is discussed briefly.