Effect of Synthesis Parameters on the Characteristics of Fe−B Nanoalloys for Dehydrogenation of Ethanol

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, N 2 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 72.8 B 27.2 , prepared using FeCl 3 in aqueous medium, showed high activity for dehydrogenation of ethanol owing to its high surface area and turnover frequency.

Hydrogenation of p-chloronitrobenzene over NiPtB nanoalloy catalysts

“…1 shows the XRD patterns of the NiPtB samples. Only one broad peak located at 2h = 44°was found, indicating the sample has an amorphous structure [32][33][34]. Notably, there are no peaks corresponding to crystalline phases of Ni, Pt, or B species in the patterns.…”

“…Their catalytic properties are highly dependent on their preparation conditions. The activity and selectivity of NiB and CoB can be altered significantly by varying the amount of metal-associated B [27][28][29][30][31][32][33][34][35][36].…”

Effect of NaBH 4 on properties of nanoscale zero-valent iron and its catalytic activity for reduction of p -nitrophenol

“…The former has been already shown to exhibit a catalytic activity such as dehydrogenation of 346 ethanol [36].…”

Synthesis and catalysis of chemically reduced metal–metalloid amorphous alloys

“…276 Chen and coworkers investigated the dehydrogenation of ethanol to acetaldehyde on Fe-based amorphous alloy catalysts. 272,277,278 Fe 72.8 B 27.2 and Fe 89.1 P 10.9 showed high activity and nearly 100% selectivity. 272,277 Moreover, Fe-P-B exhibited higher weight specific activity than Fe-P and Fe-B.…”