Insights into mesoporous nitrogen-rich carbon induced synergy for the selective synthesis of ethanol

Cobalt nanoparticles supported on microporous nitrogen-doped carbon for an efficient catalytic transfer hydrogenation reaction between nitroarenes and N-heterocycles

“…22,23 The detection of Co 2+ suggests the existence of CoO or Co 3 O 4 on the catalyst surface. This is a common phenomenon in heterogeneous transition metalbased catalysts caused by the inevitable surface oxidation of metallic Co at room temperature in air, [24][25][26] but oxides were not the major species in the samples based on the XRD and TEM results. The peaks of Co 2p slightly shifted to a lower binding energy while the peaks of N 1s shifted to a higher binding energy in the catalyst prepared at a higher annealing temperature, implying that a higher annealing temperature enhanced the interaction between N and Co nanoparticles.…”

Gd–Ru Nanoparticles Supported on Zr0.5Ce0.5O2 Nanorods for Dry Methane Reforming

“…With the growing research interest in energy security and environmental safety, synthesis gas production through dry reforming of methane (DRM) receives significant attention throughout the world. − DRM produces syngas with an equimolar ratio of hydrogen and carbon monoxide, which is specifically appropriate for the synthesis of a variety of high-value chemicals such as alcohols, olefins, and ethers. , Although a large number of publications in this area emphasized the importance of DRM in recent times, this process has not been commercially implemented to date due to the rapid deactivation of the employed catalysts by coke deposition and metal sintering under harsh reaction conditions.…”

Copper Catalysts for Synthesis Gas Conversion - Promoter and Support Effects

“…Furthermore, the carbon surface can be modified with oxygen-and/or nitrogencontaining surface groups (figure 1.2B), which act can as anchoring points for metal nanoparticles but also as acid-base ligands to the active metal sites altering the catalytic performance. [19][20][21][22] Carbon [23][24][25]. (B) Surface groups that can be present on carbon, based on ref.…”

“…37,38 In literature, carbon materials have been reported to even have a promoting role in the catalyst performance. For example, they might stabilize copper nanoparticles by confinement 20,[39][40][41][42][43][44][45] , provide hydrogen spillover activity to the active site 46 , or change the activation energy of a reaction 47,48 . Throughout this thesis we extensively use graphitic carbon supports as they are ideal for the synthesis of supported model catalysts.…”

“…[133][134][135] In the following years major efforts were made to understand several preparation parameters during co-precipitation and impregnation. Also, novel procedures to reproducibly stabilize the active CuCoOx phase are explored, such as the use of perovskites [140][141][142][143][144][145][146][147] , colloidal synthesis [148][149][150] , citrate complexation 20,[151][152][153][154][155][156] , oxalate precipitation 157 , depositionprecipitation 158,159 , and variations thereof. The combination of these two metals is also relevant for electro- [160][161][162] and photocatalysis 163 , liquid-phase oxidation 164,165 and reduction 140,[166][167][168][169][170] reactions, and gas-phase reactions such as phenol alkylation 171 and carbon nanotube synthesis 172 .…”