Effect of synthesis parameters on the characteristics of Fe-B nanoalloys for dehydrogenation of ethanol

Baskaran Rajesh, Natarajan Sasirekha, Yu Wen Chen, Shao Pai Lee

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18 Scopus citations

Abstract

Fe-B amorphous nanoalloy materials have been synthesized by chemical reduction method using various iron precursors and preparation mediums. The samples have been characterized by X-ray diffraction, inductively coupled plasma atomic emission spectroscopy, N2 sorption, transmission electron microscopy, X-ray photoelectron spectroscopy, differential scanning calorimetry, and electron diffraction. A series of studies have been performed to elucidate the influences of preparation parameters on the properties of Fe-B nanoalloys. The characterization results indicated that the amorphous nature of Fe-B materials remained up to 400°C and the presence of boron retarded the crystallization of Fe sample. The iron precursor and preparation medium play a critical role in determining the structure, morphology, and composition of Fe-B nanoalloys. The iron precursors have a significant influence on the oxidation states of iron and boron species in Fe-B nanoalloys. The catalytic activities of Fe-B nanoalloys have been investigated by subjecting them for dehydrogenation of ethanol as a probe reaction. The results indicated that Fe 72.8B27.2, prepared using FeCl3 in aqueous medium, showed high activity for dehydrogenation of ethanol owing to its high surface area and turnover frequency.

Original languageEnglish
Pages (from-to)2034-2041
Number of pages8
JournalIndustrial and Engineering Chemistry Research
Volume46
Issue number7
DOIs
StatePublished - 28 Mar 2007

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