High oxygen reduction activity on a metal–organic framework derived carbon combined with high degree of graphitization and pyridinic-N dopants

Abstract

A type of metal–organic framework derived carbon combined with high density of pyridinic-N dopants and high degree of graphitization was prepared for effective oxygen reduction.

Design Strategies toward Advanced MOF‐Derived Electrocatalysts for Energy‐Conversion Reactions

“…[40b, 41,67f ] As expected, heteroatom-doped carbon materials have emerged as a new class of advanced metalfree electrocatalysts, due to their extraordinary electrocatalytic performance, better defined reaction mechanisms, low cost, simple preparation, and easy scale-up. [33,[56][57][58][59][60][61][62][63] www.advancedsciencenews.com Among the single heteroatom-doped carbon materials, one of the most widely studied cases is the substitution of partial C (χ = 2.55) with more electronegative N (χ = 3.04). [33,56,58,60,63] In particular, MOF precursors with N-containing ligands can be directly converted into N-doped electrocatalysts after pyrolysis under inert atmosphere.…”

“…[33,[56][57][58][59][60][61][62][63] www.advancedsciencenews.com Among the single heteroatom-doped carbon materials, one of the most widely studied cases is the substitution of partial C (χ = 2.55) with more electronegative N (χ = 3.04). [33,56,58,60,63] In particular, MOF precursors with N-containing ligands can be directly converted into N-doped electrocatalysts after pyrolysis under inert atmosphere. [58,60] For instance, in order to fabricate N-doped MOF-derived materials, zeolitic imiazolate frameworks (ZIFs), a subclass of MOFs composed of tetrahedrally coordinated transition metal ions (e.g., Zn, Fe, Co, Cu) and imidazolate (IM) ligands, are frequently utilized as the precursor and/or template because of their high N content and other preferred properties, such as large surface area and uniform particle size.…”

Bimetallic organic frameworks derived CuNi/carbon nanocomposites as efficient electrocatalysts for oxygen reduction reaction

“…The heteroatoms, especially nitrogen, have the inclination to form heteroatom-metal active sites and increase catalytic efficiency during oxygen reduction [10,13]. In addition, the graphitization of the porous carbon matrix enhances electrical conductivity and therefore the catalytic performance [14,15]. However, in spite of tremendous efforts, ideal materials with excellent electrochemical activity and durability are yet to be developed.…”

“…The weak thermal stability of MOFs makes it possible to preserve their porous structure, uniform element distribution, and high porosity when transformed into porous carbon via pyrolysis [15,26,28]. Thus, MOF-derived catalysts have been the actively studied materials with comparable or better ORR catalytic performance than Pt-based catalysts [14,15,29]. Among them, transition metals in porous carbon matrix have been regarded promising to replace Pt-based materials.…”

“…Constructed from metal centers and organic linkers of great diversity, their nanoscale cavities and open structures make MOFs the ideal precursors for conversion into functional nanostructures [26,27]. The weak thermal stability of MOFs makes it possible to preserve their porous structure, uniform element distribution, and high porosity when transformed into porous carbon via pyrolysis [15,26,28]. Thus, MOF-derived catalysts have been the actively studied materials with comparable or better ORR catalytic performance than Pt-based catalysts [14,15,29].…”