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Thermally stable Pt/Ti mesh catalyst for catalytic hydrogen combustion

Stephanus Du Preez, Daniel Jones, Michael Warwick Orcid Logo, A. Falch, P.T. Sekoai, C. Mota das Neves Quaresma, D.G. Bessarabov, Charlie Dunnill Orcid Logo

International Journal of Hydrogen Energy, Volume: 45, Issue: 33, Pages: 16851 - 16864

Swansea University Authors: Stephanus Du Preez, Daniel Jones, Michael Warwick Orcid Logo, Charlie Dunnill Orcid Logo

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Abstract

In this study, platinum (Pt) supported on titanium (Ti) mesh catalysts for catalytic hydrogen combustion were prepared by depositing Pt as a thin-layer on metallic or calcined Ti mesh. The Pt thin-layer could be stabilized as uniformly distributed, near nano-sized particles on the surface of calcine...

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Published in: International Journal of Hydrogen Energy
ISSN: 0360-3199
Published: Elsevier BV 2020
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa54293
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Abstract: In this study, platinum (Pt) supported on titanium (Ti) mesh catalysts for catalytic hydrogen combustion were prepared by depositing Pt as a thin-layer on metallic or calcined Ti mesh. The Pt thin-layer could be stabilized as uniformly distributed, near nano-sized particles on the surface of calcined Ti mesh by exposing the freshly sputtered Pt to hydrogen. Temperatures between 478 and 525 °C were reached during hydrogen combustion and could be maintained at a hydrogen flow rate of 0.4 normal liter (Nl)/min for several hrs. It was determined that Ti mesh calcination at ≥900 °C formed an oxide layer on the surface of Ti wires, which prevented significant Pt aggregation. X-ray photoelectron spectroscopy revealed that the surface of Ti mesh was fully converted to TiO2 at ≥900 °C. Raman spectroscopy showed that the majority of TiO2 was present in the rutile phase, with some minor contribution from anatase-TiO2. The calcined Ti support was stable through all investigations and did not indicate any signs of degradation.
Keywords: Catalytic hydrogen combustion, Platinum, Thin-layer deposition, Titanium oxides, Thermal energy
College: College of Engineering
Issue: 33
Start Page: 16851
End Page: 16864