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Main Title: Versatile control over size and spacing of small mesopores in metal oxide films and catalytic coatings via templating with hyperbranched core-multishell polymers
Author(s): Bernsmeier, Denis
Ortel, Erik
Polte, Jörg
Eckhardt, Björn
Nowag, Sabrina
Haag, Rainer
Krähnert, Ralph
Type: Article
Language Code: en
Abstract: Controlling the pore structure of metal oxide films and supported catalysts is an essential requirement for tuning their functionality and long-term stability. Typical synthesis concepts such as “Evaporation Induced Self Assembly” rely on micelle formation and self assembly. These processes are dynamic in nature and therefore strongly influenced by even slight variations in the synthesis conditions. Moreover, the synthesis of very small mesopores (2–5 nm) and independent control over the thickness of pore walls are very difficult to realize with micelle-based approaches. In this contribution, we present a novel approach for the synthesis of mesoporous metal oxide films and catalytic coatings with ordered porosity that decouples template formation and film deposition by use of hyperbranched core–multishell polymers as templates. The approach enables independent control of pore size, wall thickness and the content of catalytically active metal particles. Moreover, dual templating with a combination of hyperbranched core–multishell polymers and micelles provides facile access to hierarchical bimodal porosity. The developed approach is illustrated by synthesizing one of the most common metal oxides (TiO2) and a typical supported catalyst (PdNP/TiO2). Superior catalyst performance is shown for the gas-phase hydrogenation of butadiene. The concept provides a versatile and general platform for the rational optimization of catalysts based e.g. on computational prediction of optimal pore structures and catalyst compositions.
Issue Date: 2014
Date Available: 21-Jun-2016
DDC Class: 540 Chemie und zugeordnete Wissenschaften
530 Physik
Sponsor/Funder: BMBF, 03EK3009, Design hocheffizienter Elektrolysekatalysatoren
Journal Title: Journal of materials chemistry : A, Materials for energy and sustainability
Publisher: Royal Society of Chemistry
Publisher Place: Cambridge
Volume: 2
Issue: 32
Publisher DOI: 10.1039/c4ta01842g
Page Start: 13075
Page End: 13082
EISSN: 2050-7496
ISSN: 2050-7488
Appears in Collections:Inst. Chemie » Publications

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