Nitrogen-Doped Carbon Foam as a Highly Durable Metal-Free Electrocatalyst for the Oxygen Reduction Reaction in Alkaline Solution

Nonprecious Metal Catalysts for Oxygen Reduction in Heterogeneous Aqueous Systems

“…Another group investigated the influence of different N sources on the types of N species formed in the catalyst and showed that N incorporation from glycine contributed to higher catalyst activity while NH 3 treatment etched the catalyst surface, giving higher surface area and improved access of O 2 to protected active sites. , The importance of pore accessibility within the surface of the catalyst was suggested by researchers using a composite of N-doped graphene and CNTs . Other recent papers also report the synthesis of other metal-free catalysts for the ORR. − …”

N, F-Codoped Microporous Carbon Nanofibers as Efficient Metal-Free Electrocatalysts for ORR

“…Currently, metal-free heteroatom-doped carbons are widely considered as promising catalysts to replace Pt-based carbon catalysts in the near future because of their high electrocatalytic activity toward ORR, cost effectiveness, longterm cycling stability, and excellent tolerance to methanol and CO oxidations [12,13]. Among these materials, nitrogen (N)-doped carbons are extensively studied because the electronegativity of N (3.04) induces charge redistribution of adjacent atoms in an N-doped carbon surface layer, which greatly enhances the ORR activity of carbon electrocatalysts [14][15][16][17][18]. Besides N, other nonmetal atoms with different electronegativities, such as boron (B) [19,20], sulfur (S) [21,22], phosphorus (P) [23,24], and fluorine (F) [25][26][27][28][29], can enhance the ORR activity of carbon catalysts.…”

Facile template-free synthesis of multifunctional 3D cellular carbon from edible rice paper

“…Cellular carbon materials are interconnected three-dimensional networks of structural elements of carbon, which exhibit several attractive properties including low overall density, adjustable electrical and thermal conductivities, high specic mechanical properties, high chemical and thermal inertness, and high specic surface area. [1][2][3] These properties have driven the use of cellular carbon materials, especially carbon foams, into a wide range of applications, such as electrodes for electrochemical cells, [4][5][6][7] thermal insulators, 8,9 catalyst support, 10,11 and absorbents for oil and organic solvents. 12,13 The precursors of the cellular carbons are abundant.…”