Highly active electrocatalyst for rechargeable Zn-air battery: 3D Fe/N-based honeycomb-like carbon

Three‐Dimensional Electrodes for Oxygen Electrocatalysis

“…Fe-N-C/NOMC 0.93 --1.55 133 [157] Co-NCF 0.83 --1.31 134 [83] IOSHs-NSC-Co 9 S 8 0.82 1.64 0.82 1.497 133 [158] CoFe/SN-C-25 0.843 1.504 0.661 1.45 169 [159] FeCo-NCNFs-800 0.797 1.686 0.869 1.48 74 [160] FeS/Fe 3 C@NS-C-900 0.78 1.5 0.72 1.455 90.9 [161] Co 9 S 8 -NSHPCNF 0.82 1.58 0.76 1. 44 113 [162] FeS/Fe 3 C@N-S-C-800 0.87 1.8 0.93 1.43 63 [163] Ni 3 Fe/N-C 0.81 1.54 0.73 1.5 128 [164] Co/S/N-800 0.831 1.591 0.76 1.539 76 [165] CoFe/NC-0.2-900@NiFeP/NF 0.82 --1.423 173 [166] FeN FePc@N,P-D 0.903 1.56 0.657 1.45 120 [21] Co-CoO x /N-C NSAs 0.83 1.508 0.678 1.32 20.7 [177] Mn-SA 0.87 ---150 [178] Co 9 S 8 /S-CNTs 0.81 1.561 0.751 1.472 60.8 [179] Co@NSC-acid 0.82 --1.42 73.5 [180] Co 9 S 8 /P@CS - Fe-NPC-1000 0.79 ---1.5 ~70 [186] (iv) In a metal-air battery, the reaction system related to oxygen-involved process is much complex compared with the electrocatalytic ORR and OER reactions in threeelectrode system. For example, the main reaction of oxygen reduction and oxygen revolution equations in a three-electrode system is different with the reactions in a metal-air battery.…”

Polypyrrole hydrogel as a universal precursor for the target preparation of heteroatom-doped hierarchical carbon with atomically distributed metal sites towards high-efficiency ORR and Zn–air batteries

“…8 Hitherto, numerous alternatives using the Earthabundant elements have been proven to be effective for the ORR, among which, the single-atom Fe catalysts, using the atomic Fe anchored carbon, with simultaneous superior catalytic activity and durability for the ORR, have been widely studied. [9][10][11] Although great efforts have been made, as far as the practical application of the atomic Fe-catalyst in ZABs is concerned, its catalytic activity for the ORR is still insufficient 12 and many issues urgently need to be addressed, such as the complicated and tedious preparing methods, as well as the low atom-utilization efficiency. 13 Therefore, developing facile but efficient processing approaches to fabricate atomically dispersed Fe catalysts is of great signicance and is highly desired for the development of ORR-based energy devices.…”