Highly Selective Copper Catalyst Supported on Mesoporous Carbon for the Dehydrogenation of Ethanol to Acetaldehyde

Abstract

2723Highly Selective CopperC atalyst Supported on Mesoporous Carbonfor the Dehydrogenation of Ethanol to Acetaldehyde "The development of novel catalytic materials is exciting" This and more about the story behind the research featured on the front cover can be found in this issue's Cover Profile. Read the full text of the corresponding research at http://dx.doi.org/ 10.1002/cctc.201500501. NEWS Spotlights on our sister journals2738 -2741 COVER FEATURESThe Front Cover shows the dehydrogenation transformation of ethanol to acetaldehyde and hydrogen as an atom-economic process catalyzedb yC up articles supported on am esoporous carbon. In their Full Paper,Q. -2881Characterizing Graphitic Carbonwith X-ray PhotoelectronS pectroscopy:AStep-by-Step Approach Puttingcarbon defects in line: Highresolution XPS and XPS depthprofiling are used to characterize binding energies and spectralline shapes of sp 2 carbon,surface-defect states, and disordered carbon in highly ordered carbon nanostructures. The distinctf eatureso f these components, for example, the strong asymmetricshapeofthe sp 2 carbon peak changing with surface curvature and defect density,cannotbe neglected in spectralanalysisand require careful evaluationf or ah igh quality deconvolution. HOPG = Highly ordered pyrolytic graphite.

Tailoring the Surface Structure of Silicon Carbide Support for Copper Catalyzed Ethanol Dehydrogenation

“…Moreover, these cascade reactions also take place on undesired Cu + sites generated in the reduction process originating from well‐dispersed copper phyllosilicate ,. In order to improve acetaldehyde selectivity by cutting down the secondary reactions, carbon materials with relatively inert surfaces have been successfully applied as supports for DHEA process,, indicating excellent acetaldehyde selectivity of 94.1 % at 280 °C . However, Cu nanoparticles on carbon supports tend to agglomerate and easily deactivate on account of the weak interaction between Cu and carbon ,.…”

A Highly Porous Carbon Support Rich in Graphitic‐N Stabilizes Copper Nanocatalysts for Efficient Ethanol Dehydrogenation

“…For this endothermic (Δ H =+52.5 kJ mol −1 ), non‐oxidative, direct dehydrogenation of ethanol, copper‐based catalysts appear to be most suitable . Mesoporous silica‐supported copper catalysts perform particularly well and the ethanol conversion can reach 85 % with a selectivity of 73 % towards acetaldehyde at 260 °C . The existence of Si−O−M bonds, formed between the active metal (M, here Cu) and ‐OH groups on the silica surface, was identified as the key for maintaining copper stability .…”

Highly Selective Solid Acid Catalyst H1−xTi2(PO4)3−x(SO4)x for Non-Oxidative Dehydrogenation of Methanol and Ethanol

“…Supported metal nanoparticles can be effective for ethanol conversion as well. For example, Cu/mesoporous carbon [12], Au/MoO 3 [13], and Au/MgCuCr 2 O 4 [14] have been reported to show high conversions/selectivities of (83.3%-98%)/(94%-99%) at temperatures between 240 and 290 • C. When up to 20 wt % silver was added to SiO 2 -MgO, SiO 2 -Al 2 O 3 , and Al 4 Si 4 O 10 (OH) 8 , they showed conversions above 90% and selectivities for formaldehyde above 70% at 625-650 • C [15][16][17]. However, the limited span of their high activities has been a challenging issue [18].…”