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2011-Sustainable Industrial Processing Summit
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| Editors: | Florian K |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2012 |
| Pages: | 646 pages |
| ISBN: | 978-0-9879917-4-4 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
Synergistic Effect Of Pt (0.04%) On Bimetallics Al-X (X= Sn, In) For Hydrogen Production
Seydy Olvera1; Elsa Miriam Arce1;1INSTITUTO POLITECNICO NACIONAL, Mexico, Mexico;
Type of Paper: Regular
Id Paper: 401
Topic: 7
Abstract:
Currently the best catalysts for the HER (Hydrogen Evolution Reaction) is Pt but due to their high costs numerous studies are underway to replace it and Al has emerged as a promising source of hydrogen. However, given its strong tendency to passivates due to the formation of an Al2O3 film, has been used in conditions in which its surface is constantly renewed, or its hyperactivation has been induced by the addition of metals of low melting point, like Sn or In. In this study both effects were analyzed together. Bimetallic materials Al-X (X= Sn or In) were synthesized by ball milling, and the effect of both, the content of Sn or In, and the milling time were analyzed. The synthesized materials were characterized by X-ray Diffraction, Scanning Electron Microscopy and the evaluation of their electrocatalytic activity for hydrogen evolution reaction (HER), was studied in a 2M NaCl solution at 25°C, by cyclic polarization and potentiostatic pulses. The mechanical milling proved to be a suitable as synthesis method for to obtain aluminum base materials containing low melting point metals better that the classical method of fusion. Also provide high surface area materials. The crystallite size of the synthesized materials was around 20nm. The presence of Sn and In significantly improved the reactivity of Al for HER, especially when the content of them was 0.04%, however, milling time had no significant effect.