Methanol Selective Oxidation to Methyl Formate over ReOx/CeO2 Catalysts

Abstract

Methanol selective oxidation to methyl formate was investigated over ReO x /CeO 2 catalysts in terms of Re loading and reaction mechanism. It was found that Re loading with monolayer dispersion on ceria exhibited promising reaction rate of methanol of 16 mmol g cat.-1 h -1 and methyl formate selectivity of about 90% at 513 K. The surface reaction of methanol, formaldehyde, and methyl formate over the ReO x /CeO 2 catalyst was investigated by in situ Fourier transform infrared spectroscopy and it was revealed that the formate species, formed by the oxidation of adsorbed -OCH 3 species, could act as the key reaction intermediate, which further reacted with gaseous methanol to form methyl formate and/or decompose into CO and CO 2 , depending on the reaction temperature.

Highly Dispersed and Active ReOx on Alumina-Modified SBA-15 Silica for 2-Butanol Dehydration

“…The sample spinning rate used for all the measurements was 15.0 ± 0.01 kHz. Al(OH) 6 was used as a reference at 0 ppm that is essentially the same as the common standard of 1.5 M Al(NO 3 ) 3 in D 2 O. The pulses angle for acquiring 27 Al spectra was approximately 90°, corresponding to a 1.5 μs pulse width.…”

Hydrogenolysis of 1,2‐Propanediol for the Production of Biopropanols from Glycerol

“…On the other hand, adsorbed methoxy species is formed by the interaction between methanol and the ionic Re species. [22] Therefore, the alkoxide of 1,2-PrD is adsorbed on the Re species. In addition, it has been reported that the interaction of glycerol [15] and tetrahydrofurfuryl alcohol [21] with ReO x and MoO x species is rather strong.…”

First-principles studies on adsorbate-induced faceting ofRe(112¯1)

“…4 Recently, it received increasing interest due to the fact that Re-based catalysts show high reactivity in many important catalytic reactions such as selective reduction of NO x with NH 3 , selective oxidation of methanol, thiophene hydrodesulfurization, and ammonia synthesis, where the reaction rate is sensitive to the catalyst surface structure. [5][6][7][8][9][10] Particularly, the recent discovery of O-covered faceted Re͑1231͒ for the growth of Co nanoclusters demonstrates that adsorbate-covered faceted metal surfaces are also promising templates for synthesis of active model catalysts with high selectivity. 11,12 Besides their catalytic properties, such nanostructured surfaces might provide a basis for bridging the gap between nanoparticles and single-crystal surfaces.…”