Studies on microstructure of activated aluminum and its hydrogen generation properties in aluminum/water reaction
Source abstract
Abstract
Abstract Aluminum is a prospective material for hydrogen generation during metal/water reaction due to its high efficiency (1.24 l of H 2 from 1 g of Al), availability, low price, and safety. To realize its reactivity towards water at ambient conditions the metal activation is needed. The samples of aluminum activated by Ga-In alloy (70:30 wt%) at low-energy (LE) and high-energy (HE) treatment are considered. HE treatment (mechanochemical activation of aluminum in ball mill) allows to get high reactivity powders having H 2 generation rate in two orders of magnitude higher than for LE-activated aluminum. The values of activation energy for reactions of activated aluminum with water were calculated: E a = 55 ± 5 kJ/mol for LE-activated aluminum; E a = 35 ± 5 kJ/mol for HE-activated aluminum. The microstructure and composition of the samples of activated aluminum were determined by means of scanning electron microscope with energy dispersive X-ray spectrometer, differential scanning calorimeter and X-ray powder diffraction method. The depth profiles of the activated aluminum components have been measured by Auger electron spectroscopy. Possible mechanism of aluminum/activator interaction was proposed.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Hydrogen Storage and Materials · Ammonia Synthesis and Nitrogen Reduction · Fuel Cells and Related Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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