Controlled Nanopore Sizes in Supraparticle Supports for Enhanced Propane Dehydrogenation with GaPt SCALMS Catalysts

Controlled Nanopore Sizes in Supraparticle Supports for Enhanced Propane Dehydrogenation with GaPt SCALMS Catalysts

The efficient immobilization of GaPt liquid metal alloy droplets onto tailored supports improves catalytic performance by preventing coalescence and subsequent loss of active surface area. Herein, we use tailored supraparticle (SP) supports with controlled nanopores to systematically study the influ...

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Bibliographic Details
Main Author: Nnamdi Madubuko (19965250) (author)
Other Authors: Umair Sultan (9203541) (author), Simon Carl (14521124) (author), Daniel Lehmann (2338480) (author), Xin Zhou (54275) (author), Alexander Soegaard (19965253) (author), Nicola Taccardi (1291488) (author), Benjamin Apeleo Zubiri (14796154) (author), Susanne Wintzheimer (7027340) (author), Erdmann Spiecker (1511563) (author), Marco Haumann (2543539) (author), Nicolas Vogel (1786075) (author), Peter Wasserscheid (1291494) (author)
Published: 2024
Subjects:
Biophysics
Biochemistry
Physiology
Evolutionary Biology
Infectious Diseases
Space Science
Chemical Sciences not elsewhere classified
Physical Sciences not elsewhere classified
scalable ultrasonication method
reduced deactivation rates
primary particles constituting
interstitial sites formed
active surface area
use tailored supraparticle
immobilized onto sio
15 h time
enhanced propane dehydrogenation
controlled nanopore sizes
gapt scalms catalysts
gapt droplets within
propane dehydrogenation
gapt immobilized
pore sizes
gapt droplets
controlled nanopores
026 h
yield droplets
systematically study
supraparticle supports
successful immobilization
subsequent loss
stream evidenced
remained unchanged
recycling loops
preventing coalescence
prepared via
pdh revealed
pdh ).
nanocomputed tomography
high potential
findings underscore
catalytic reaction
catalytic evaluations
320 nm
300 nm
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Summary:The efficient immobilization of GaPt liquid metal alloy droplets onto tailored supports improves catalytic performance by preventing coalescence and subsequent loss of active surface area. Herein, we use tailored supraparticle (SP) supports with controlled nanopores to systematically study the influence of pore sizes on the catalytic stability of GaPt supported catalytically active liquid metal solution (SCALMS) in propane dehydrogenation (PDH). Initially, GaPt droplets were prepared via an atom-efficient and scalable ultrasonication method with recycling loops to yield droplets <300 nm. Subsequently, these droplets were immobilized onto SiO<sub>2</sub>-based SPs with controlled pore sizes ranging from 45 to 320 nm. Catalytic evaluations in PDH revealed that GaPt immobilized on SPs with larger pores demonstrated superior stability over 15 h time-on-stream evidenced by reduced deactivation rates from 0.046 to 0.026 h<sup>–1</sup>. Nanocomputed tomography and identical location SEM confirmed the successful immobilization of GaPt droplets within the interstitial sites formed by the primary particles constituting the SPs. These remained unchanged before and after the catalytic reaction, demonstrating efficient coalescence prevention. Our findings underscore the importance of support pore size engineering for improving the stability of GaPt SCALMS catalysts and highlight, particularly, the high potential of using SPs in this context.

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