Al-Rifai, Noor, Miedziak, Peter J, Morad, Moataz, Sankar, Meenakshisundaram, Waldron, Conor, Cattaneo, Stefano, Cao, Enhong, Pattisson, Samuel, Morgan, David, Bethell, Donald 
ORCID: 0000-0002-7320-7585 et al (show 2 more authors)
(2017)
Deactivation Behavior of Supported Gold Palladium Nanoalloy Catalysts during the Selective Oxidation of Benzyl Alcohol in a Micropacked Bed Reactor.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 56 (45).
pp. 12985-12994.
Abstract
Highly active, supported Au-Pd catalysts have been tested for catalyzing benzyl alcohol oxidation in a silicon-glass micropacked bed reactor. The effects of Au-Pd composition and anion content during catalyst preparation on catalyst deactivation were studied, and a relationship between the deactivation rate and the amount of Cl- and Au used in the catalyst formulation was found. While Au AIDS in enhancing the selectivity to the desired product and the Cl- ions help the formation of uniform 1-2 nm nanoparticles, higher amounts of Au and Cl- become detrimental to the catalyst stability once a certain amount is exceeded. Loss of small (1-2 nm) metal nanoparticles was evident in all catalysts studied, accompanied by agglomeration and the formation of larger >10 nm particles. A secondary deactivation mechanism characterized by the formation of an amorphous surface film was observed via transmission electron microscopy in catalysts with high Cl- and Au and was associated with the detection of carbon species on the catalyst surface using Raman spectroscopy.
| Item Type: | Article |
|---|---|
| Depositing User: | Symplectic Admin |
| Date Deposited: | 30 Jan 2020 14:22 |
| Last Modified: | 19 Jan 2023 00:05 |
| DOI: | 10.1021/acs.iecr.7b01159 |
| Open Access URL: | https://pubs.acs.org/doi/10.1021/acs.iecr.7b01159 |
| Related URLs: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3072708 |
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