Journal Article

FZJ-2021-01403

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Elucidating the Influence of the d-Band Center on the Synthesis of Isobutanol

Häusler, J. (Corresponding author)FZJ* ; Pasel, J. (Corresponding author)FZJ* ; Woltmann, F.FZJ* ; Everwand, A.FZJ* ; Meledina, M.FZJ* ; Valencia, H.FZJ* ; Lipińska-Chwałek, M.FZJ* ; Mayer, J.FZJ* ; Peters, R.FZJ*

2021
MDPI Basel

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Please use a persistent id in citations: http://hdl.handle.net/2128/27477  doi:10.3390/catal11030406

Abstract: As the search for carbon-efficient synthesis pathways for green alternatives to fossil fuels continues, an expanding class of catalysts have been developed for the upgrading of lower alcohols. Understanding of the acid base functionalities has greatly influenced the search for new materials, but the influence of the metal used in catalysts cannot be explained in a broader sense. We address this herein and correlate our findings with the most fundamental understanding of chemistry to date by applying it to d-band theory as part of an experimental investigation. The commercial catalysts of Pt, Rh, Ru, Cu, Pd, and Ir on carbon as a support have been characterized by means of SEM, EDX-mapping, STEM, XRD, N2-physisorption, and H2-chemisorption. Their catalytic activity has been established by means of c-methylation of ethanol with methanol. For all catalysts, the TOF with respect to i-butanol was examined. The Pt/C reached the highest TOF with a selectivity towards i-butanol of 89%. The trend for the TOFs could be well correlated with the d-band centers of the metal, which formed a volcano curve. Therefore, this study is another step towards the rationalization of catalyst design for the upgrading of alcohols into carbon-neutral fuels or chemical feedstock.

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Contributing Institute(s):

1. Elektrochemische Verfahrenstechnik (IEK-14)
2. Materialwissenschaft u. Werkstofftechnik (ER-C-2)

Research Program(s):

1. 535 - Materials Information Discovery (POF4-535) (POF4-535)
2. 1232 - Power-based Fuels and Chemicals (POF4-123) (POF4-123)

Appears in the scientific report 2021

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