Controlled Synthesis of Co@N-Doped Carbon by Pyrolysis of ZIF with 2-Aminobenzimidazole Ligand for Enhancing Oxygen Reduction Reaction and the Application in Zn–Air Battery

Abstract

1.439 V of open-circuit voltage and 1413.3 Wh•kg −1 of energy density.

Ethanol Dehydrogenation to Acetaldehyde over Co@N-Doped Carbon

“…However, their input obviously correlates with the N-ligand taken, and the catalysts based on 1,10-phenanthroline, Co@NC-Gr and Co@NC-Gr SA , have a higher percentage of pyridinic nitrogen. The XPS characteristics are fully in line with those of Co@NC materials known in the literature [19][20][21][22][23][24][27][28][29][30][34][35][36][37].…”

“…However, it is noteworthy in this regard that carbon materials doped by a combination of a transition metal (Fe, Ni, Cu, and especially Co) and nitrogen have recently attracted significant interest as highly efficient noble-metal-free catalysts in a variety of applications [18][19][20][21][22][23][24][25][26]. Above all, liquid phase oxidative esterification of alcohols [19,[27][28][29][30][31][32][33], oxidative dehydrogenation of 1,2,3,4-tetrahydroquinolines into quinolines [20,21], non-oxidative dehydrogenation of propane to propylene [19] and selective dehydrogenation of formic acid [34][35][36] catalyzed by Co@NC materials should be highlighted as quite encouraging for the use of the analogous catalysts in a gas phase ethanol-to-acetaldehyde conversion.…”

“…They were often obtained by the incipient wetness impregnation of carbon black or carbon nanotubes with cobalt(II) salts and N-ligands, followed by pyrolysis [21,22]. In addition, Co@NC can be synthesized through carbonization of cobalt-nitrogen containing metalorganic frameworks (MOFs), such as zeolitic-imidazole frameworks (ZIFs) [23,30,35]. Even more practical seems to be a synthetic approach based on a solid-state mixing of carbon black with cobalt(II) salts and N-ligands, followed by heat treatment, which can result in Co@NC catalysts of comparable activity with regard to particular reactions [36,37].…”

“…The latter proved to be atomically-dispersed Co(II)-N x sites incorporated in graphene/graphitic carbon [35]. It is remarkable, however, that the relative content of the structural elements listed may be regulated by using special synthetic or post-synthetic approaches [19,23,[34][35][36]. This, in principle, allows the establishment of which of the active sites determines the catalytic performance in any given reaction.…”

High Level Oxygen Reduction Catalysts Derived from the Compounds of Large Specific Surface Area Pine Peel Activated Carbon and Phthalocyanine Cobalt

“…nitrides [14], selenides [15], and heteroatoms doped carbon materials [16][17][18]. Among them, heteroatoms doped carbon materials are very effective in improving the catalytic activity of ORR for the large SSA and lots of catalytic sites [19].…”