Atomic Layer Deposition on Spray-Dried Supraparticles to Rationally Design Catalysts with Ultralow Noble Metal Loadings

Groppe P, Müller V, Will J, Zhou X, Zhang K, Moritz M, Papp C, Libuda J, Retzer T, Spiecker E, Bachmann J, Mandel K, Wintzheimer S (2025)

Publication Type: Journal article

Publication year: 2025

Journal

Chemistry of Materials American Chemical Society

URI: https://pubs.acs.org/doi/full/10.1021/acs.chemmater.4c03429

DOI: 10.1021/acs.chemmater.4c03429

Abstract

The controlled assembly of supraparticles by using spray-drying enables the synthesis of nanoporous materials. Changing the size of the constituent nanoparticles or their agglomeration states provides access to a diverse range of pore frameworks. This turns supraparticles into ideal scaffolds in heterogeneous catalysis. The combination of supraparticles with atomic layer deposition (ALD) as a surface functionalization technique offers excellent control over the deposition of a functional material and its distribution over the scaffold on the nanoscale. This work reports the combination of SiO2 supraparticles as tunable scaffolds and their loading with a platinum-based ALD catalyst. The deliberate adjustment of the scaffold pore framework via spray-drying and its effect on the catalyst deposition are highlighted. Furthermore, varying numbers of Pt ALD cycles are applied to explore the capability of the combination approach with respect to catalyst loading and Pt efficiency. High-resolution electron microscopy reveals ultrasmall Pt clusters deposited on the supraparticles after the very first ALD cycle. Using the hydrogenation of 4-nitrophenol as a demonstration, the impact of the pore framework and the Pt deposition variation in ALD on the catalytic functionality is investigated.

Authors with CRIS profile

Philipp Groppe Professur für Anorganische Chemie Valentin Müller Lehrstuhl für Partikelbasierte Materialchemie Johannes Will Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Kailun Zhang Lehrstuhl für Katalytische Grenzflächenforschung Michael Moritz Lehrstuhl für Physikalische Chemie II Jörg Libuda Lehrstuhl für Katalytische Grenzflächenforschung Tanja Retzer Lehrstuhl für Katalytische Grenzflächenforschung Erdmann Spiecker Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Julien Bachmann Lehrstuhl für Chemistry of thin film materials Karl Mandel Lehrstuhl für Partikelbasierte Materialchemie Susanne Wintzheimer Professur für Anorganische Chemie

Involved external institutions

Freie Universität Berlin DE Germany (DE)

How to cite

APA:

Groppe, P., Müller, V., Will, J., Zhou, X., Zhang, K., Moritz, M.,... Wintzheimer, S. (2025). Atomic Layer Deposition on Spray-Dried Supraparticles to Rationally Design Catalysts with Ultralow Noble Metal Loadings. Chemistry of Materials. https://doi.org/10.1021/acs.chemmater.4c03429

MLA:

Groppe, Philipp, et al. "Atomic Layer Deposition on Spray-Dried Supraparticles to Rationally Design Catalysts with Ultralow Noble Metal Loadings." Chemistry of Materials (2025).

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