Synergistic effect of urchin-like spherical Cu-based catalyst for enhanced dimethyl oxalate hydrogenation capacity

Ultra-Small Pt–Ni Bimetallic Nanoparticles Confined in Dendritic Mesoporous Silica with Remarkable CO Catalytic Oxidation Performance

“…The crystal phase structures of the synthesized 1% Pt x Ni 1– x /KCC-1 catalysts were investigated using XRD. As shown in Figure A, broad diffraction peaks ranging from 15 to 33.7° were observed for all samples, which were ascribed to the diffraction peak of amorphous SiO 2 . − Moreover, no characteristic diffraction peak related to Pt or Ni species was observed for the 1% Pt x Ni 1– x /KCC-1 catalysts. This may be due to the low loading of Pt and Ni (1 wt %), which prevented the detection of the characteristic diffraction peak by XRD.…”

Role of the Cu dopant in the textural and catalytic features of the Co/ZnO catalyst for dimethyl oxalate selective hydrogenation

“…It is well‐established that DMO hydrogenation is stepwise: DMO partial hydrogenation to MG, then further hydrogenation of MG to EG. The EG can excessively hydrogenate to EtOH, even decompose to methane, deteriorating the resultant alcohol yield by cracking the C‐C/C‐O bonds 1 . No EG and only 15.0% EtOH yield with methane as the main product over the Co/ZnO catalyst from DMO selective hydrogenation should be associated with the exceptional H 2 activation ability and capability of the isolated Co active sites, as shown in Figs 5 and 9.…”

“…Currently, a promising chemical synthesis technology for the versatile simple diols (ethylene glycol, EG) from the syngas-derived dimethyl oxalate (DMO) intermediate has been attracting extensive attention, owing to its economic and environmentally friendly virtues. 1,2 This novel routine independent of petrochemical feedstock has the potential to satisfy market demand with the first successfully commercialized DMO synthesizing technology step. 3,4 In particular, the feedstock can be gained from various feedstocks including natural gas, coal, renewable biomass and even organic waste, guaranteeing adequate supply.…”

Rational design of hydroxyapatite/graphite-supported bimetallic Cu–M (M = Cu, Fe, Co, Ni) catalysts for enhancing the partial hydrogenation of dimethyl oxalate to methyl glycolate

“…More precisely, after adsorption of DMO molecules on the Cu surface, the primary active Cu 0 sites are responsible for H 2 dissociation (H-H) to react with the broken C-O bond adjacent to the carbonyl group in MG to produce acyl and methoxyl groups, and subsequently form/extract out the CH 3 OH product. 36 Meanwhile Cu + sites work as the electrophilic centers to stabilize/adsorb the other methoxy (-R-OCH 3 ) and acyl (-RCO) groups to form the final MG product. Noteworthily, the stabilization process of surface Cu + species was performed previously through the addition of noble metals (Ag, Au, and Ru), whereas surface functional groups such as -OH and -PO 4 have also shown promising ability to obtain a high ratio of Cu + /(Cu + + Cu 0 ).…”