Isolated single iron atoms anchored on a N, S-codoped hierarchically ordered porous carbon framework for highly efficient oxygen reduction

Abstract

Atomically dispersed metal catalysts are promising candidates for oxygen reduction reaction (ORR) and achieving efficient energy conversion. However, rational design of single atom catalysts (SACs) with high-efficiency ORR catalytic activity...

Different Bonding Defects on Dual‐Metal Single‐Atom Electrocatalyst CoZnN6(OH) for Oxygen Reduction Reaction

“…Single‐atom catalysts (SACs) have been reported as highly active non‐precious electrocatalysts for ORR, OER and CO 2 RR etc, due to their abundant atomically‐ homogenized active centers [1–11] . As one of the most intriguing SACs, the transition metal−nitrogen−carbon (TM‐N x −C) system exhibited promising electrocatalytic activity, in which the transition metals are atomically distributed as isolated atoms supported by N‐doped carbon materials [12] .…”

“…Single-atom catalysts (SACs) have been reported as highly active non-precious electrocatalysts for ORR, OER and CO 2 RR etc, due to their abundant atomically-homogenized active centers. [1][2][3][4][5][6][7][8][9][10][11] As one of the most intriguing SACs, the transition metalÀ nitrogenÀ carbon (TM-N x À C) system exhibited promising electrocatalytic activity, in which the transition metals are atomically distributed as isolated atoms supported by N-doped carbon materials. [12] FeÀ N x À C was synthesized to display good ORR performance, where FeN 4 was regarded as the dominated active coordinated structure with the onset potential of 0.93 V. [2] Dual-metal nitrogen-carbon (TM 2 N 6 À C) materials were shown to further enhance ORR performance by experiments and DFT calculations.…”

Rugae‐like N‐doped porous carbon incorporated with Fe‐N x and Fe 3 O 4 dual active sites as a powerful oxygen reduction catalyst for zinc‐air batteries

“…62 High-resolution N 1s spectrum displayed four component peaks at 397.8 (pyridinic N, 48.78%), 399.1 (Fe-N x , 9.80%), 63,64 400.2 (pyrrolic N, 29.13%), 401.8 eV (graphitic N, 8.85%), and 403.5 eV (oxidized N, 3.44%), proving that N was successfully doped into the carbon skeletons (Figure 3C). 65 By coordinating with pyridineand pyrrole-N, Fe can form atomically dispersed Fe-N x species. The coordination of single Fe atoms and the neighboring N was confirmed by the Fe-N bond.…”

A superior electrocatalyst toward the oxygen reduction reaction obtained by atomically dispersing copper on N, F co-doped graphene through atomic interface engineering

“…11 Therefore, the synthesis of ideally dispersed and extremely small-sized SACs is very challenging. 12 Although the methods of atomic layer deposition and mass selective soft landing are usually used for the preparation of SACs, these methods are often regarded as expensive and low-yield strategies, which limit their applications. Therefore, exploring adjustable and practical synthetic methods, such as the co-precipitation method, 13,14 immersion method, 15 thermal atom capture method, 16 metal–organic framework pyrolysis method, etc.…”