Iron-catalyzed graphitization for the synthesis of nanostructured graphitic carbons

Abstract

Carbons are versatile and diverse materials that have numerous applications across energy and environmental sciences. Carbons with a graphitic structure are particularly appealing due to their high chemical stability, large...

Modulating between 2e− and 4e− pathways in the oxygen reduction reaction with laser-synthesized iron oxide-grafted nitrogen-doped carbon

“…Iron-based compounds are well-known as catalysts for graphitization of carbon. 30 The mechanism of graphitization is oen not clear; however, in this case we observe an obvious difference between the two preparation routes. During pre-carbonization at 300 °C partial decomposition and crosslinking of the molecular precursors occur.…”

Microwave-Induced One-Pot Preparation of Bifunctional N-Fe/BC Catalysts and Oriented Production of Phenol-Enriched Bio-Oil from Biomass Pyrolysis: Catalyst Synthesis, Performance Evaluation, and Mechanism Insight via Theoretical Calculations

“…This was because the active carbon atoms in the biochar slurry dissolved and diffused, and then they combined with Fe to form cementite (Fe 3 C), which was in agreement with the XRD results. As the reaction proceeded, carbon atoms precipitated out of the metal due to saturation, forming dense two-dimensional carbon atom layers on the two surfaces of the self-generated Fe template, resulting in graphene on the surface . According to free electron theory, a higher graphitization degree of carbon could improve the electrical conductivity and then reinforce the dielectric loss, which was conducive to the improvement of the ability of N-Fe/BC to absorb more microwave energy and convert it to heat energy …”

“…As the reaction proceeded, carbon atoms precipitated out of the metal due to saturation, forming dense two-dimensional carbon atom layers on the two surfaces of the self-generated Fe template, resulting in graphene on the surface. 33 According to free electron theory, a higher graphitization degree of carbon could improve the electrical conductivity and then reinforce the dielectric loss, which was conducive to the improvement of the ability of N-Fe/BC to absorb more microwave energy and convert it to heat energy. 34 Nitrogen adsorption−desorption curves were utilized to explore the pore structures of BC and N-Fe/BC.…”

3D Carbon Materials for High-Performance Electric Energy Storage Facilities

“…Therefore, many groups selected these carbon nanomaterials as building constituents to fabricate advanced 3D carbon frameworks. , By activating the carbon atoms at the boundary of these materials, C–C bonding will be formed between the structural units to form cross-linking carbon phases and fabricate 3D frameworks, which both eliminate electron scattering at interfaces and provide a large electrochemically active area. − Our group has developed a universal strategy for C–C bond activation based on the transition metal–carbon solid solution system. At high temperature, the transition metals such as Fe, Co, and Ni can catalyze C–C bond breaking where the activated carbon atoms will form at the metal–carbon interface. , At the same time, the carbon atoms can be dissolved in these transition metals. When the carbon atoms in the metal/carbon solid solutions are supersaturated, they will precipitate out and bond with the activated carbon atoms on the metal surface, forming covalently bonded 3D carbon networks .…”