Richards, Nia, Carter, James H., Nowicka, Ewa, Parker, Luke A., Pattisson, Samuel, He, Qian  ORCID: https://orcid.org/0000-0003-4891-3581, Dummer, Nicholas F. ORCID: https://orcid.org/0000-0002-0946-6304, Golunski, Stanislaw ORCID: https://orcid.org/0000-0001-7980-8624 and Hutchings, Graham J. ORCID: https://orcid.org/0000-0001-8885-1560
2020.
Structure-sensitivity of alumina supported palladium catalysts for N2O decomposition.
Applied Catalysis B: Environmental
264
, 118501.
10.1016/j.apcatb.2019.118501
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Abstract
The catalytic activity of Pd/γAl2O3 for N2O decomposition was found to be highly dependent on the preparation methodology and the number of reaction cycles. Chloride species on the surface of a 2.6 wt. % Pd-Al2O3 catalyst prepared by wet impregnation were identified as inhibiting the activity. Multiple reaction cycles were shown to remove these species, and a subsequent increase in activity was observed; 10.3 molN2O h−1 kgcat−1 in the first use, increased to 28.7 molN2O h−1 kgcat−1 on the fourth use both at 550 °C. Additionally, removal of physisorbed water from the support prior to metal deposition increased the thermal stability of Pd nanoparticles and increased the catalyst activity. Catalysts were subsequently prepared using a deposition technique with an increased concentration of Cl- ions resulted in increased Pd-Cl species in the final catalyst and the catalytic activity was consequently increased due to the improved control of Pd particle size.
| Item Type: | Article |
|---|---|
| Date Type: | Publication |
| Status: | Published |
| Schools: | Schools > Chemistry Research Institutes & Centres > Cardiff Catalysis Institute (CCI) |
| Publisher: | Elsevier |
| ISSN: | 0926-3373 |
| Funders: | ERC |
| Date of First Compliant Deposit: | 3 January 2020 |
| Date of Acceptance: | 29 November 2019 |
| Last Modified: | 06 Nov 2024 20:00 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/128182 |
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