Thermally stable Pt/Ti mesh catalyst for catalytic hydrogen combustion
| Autor: | S.P. du Preez, Dmitri Bessarabov, C. Mota das Neves Quaresma, Patrick T. Sekoai, Anzel Falch, Michael E. A. Warwick, Charles W. Dunnill, Daniel R. Jones |
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| Přispěvatelé: | 22730389 - Bessarabov, Dmitri Georgievich, 21220212 - Du Preez, Stephanus Petrus, 20286317 - Falch, Anzel, 31589235 - Sekoai, Patrick Thabang |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Hydrogen Oxide Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology Thermal energy 010402 general chemistry 01 natural sciences law.invention Catalysis chemistry.chemical_compound X-ray photoelectron spectroscopy law Calcination Platinum Renewable Energy Sustainability and the Environment Catalytic hydrogen combustion Titanium oxides 021001 nanoscience & nanotechnology Condensed Matter Physics Thin-layer deposition 0104 chemical sciences Fuel Technology chemistry Chemical engineering Rutile 0210 nano-technology Titanium |
| Zdroj: | International Journal of Hydrogen Energy. 45:16851-16864 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2020.04.112 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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