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Thermally stable Pt/Ti mesh catalyst for catalytic hydrogen combustion / Stephanus, Du Preez; Daniel, Jones; Michael, Warwick; Charlie, Dunnill

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

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

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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
Issue: 33
Start Page: 16851
End Page: 16864