N-doped carbon nanosheets with ultra-high specific surface area for boosting oxygen reduction reaction in Zn-air batteries

Heteroatom doped M–N–C single-atom catalysts for high-efficiency oxygen reduction reaction: regulation of coordination configurations

“…9,10 However, the high cost, low atom utilization and poor selectivity of Pt-based catalysts greatly hinder their large-scale application. 11,12 Therefore, it is of great signicance to develop low-cost, high-efficiency and stable nonprecious metal-based ORR catalysts for large-scale application. 4 Among many non-precious metal-based catalysts, transition metal-nitrogen-carbon (M-N-C) catalysts, especially transition metal-nitrogen-carbon single-atom catalysts (M-N-C SACs) have the advantages of abundant raw material sources, high ORR catalytic activity, and good stability, and have been one of the most promising non-precious metal-based catalysts for the ORR to replace Pt-based materials.…”

“…9,10 However, the high cost, low atom utilization and poor selectivity of Pt-based catalysts greatly hinder their large-scale application. 11,12 Therefore, it is of great significance to develop low-cost, high-efficiency and stable non-precious metal-based ORR catalysts for large-scale application. 4…”

Porous Structure Controlling the Selectivity of Oxygen Reduction Reaction on N‐Doped Carbon in Alkaline Solution

“…[4,5] Furthermore, there has been little understanding about the mechanisms on the ORR selectivity. It appears that a four-electron transfer pathway of ORR can be achieved in N-doped carbon materials in alkaline condition, [6][7][8] whereas the two-electron pathway can proceed in both alkaline [9,10] and acidic electrolytes. [11][12][13] For example, Lee et al reported that the collagen-derived carbons with N-doped structures show promising two-electron ORR for peroxide production in alkaline electrolytes, and the surface oxygencontaining groups are believed to contribute to the two-electron selectivity.…”

Exploring the structural dependence of metal-free carbon electrocatalysts on zinc-based metal–organic framework types

“…have been employed as activators in the pyrolysis of various precursors to prepare carbon-based catalysts. [37][38][39][40][41][42][43][44][45][46][47][48][49][50][51] They completely decompose into corrosive gases (ammonium, isocyanic acid, etc.) during pyrolysis, 52 which offers the opportunity to tailor the structure and morphology/porous structure of the derived carbon catalysts.…”

“…In this context, many MOF-derived carbon-based catalysts with unique morphology and high ORR activity were prepared with the assistance of a sacrificial activator. [45][46][47][48][49][50][51] Nevertheless, how the MOF type influences the structure and further the ORR activity of derived metal-free carbon catalysts is still elusive.…”