Bamboo-like nitrogen-doped porous carbon nanofibers encapsulated nickel–cobalt alloy nanoparticles composite material derived from the electrospun fiber of a bimetal–organic framework as efficient bifunctional oxygen electrocatalysts

Abstract

Bamboo-like nanofibers NiCo-0.8@N-CNFs-800 demonstrated an excellent bifunctional electrocatalytic performance, with a low reversible overpotential of 0.79 V between the ORR (E1/2) and OER (Ej = 10 mA cm−2).

Electronic modulation and interface engineering of electrospun nanomaterials‐based electrocatalysts toward water splitting

“…Bi‐ or multimetal nanomaterials are not only be regarded as efficient HER electrocatalysts but also OER electrocatalysts 141,148‐155 . A typical example is the PdNi nanoparticles encapsulated in CNFs (PdNi/CNFs) for both HER and OER applications 141 .…”

“…Bi-or multimetal nanomaterials are not only be regarded as efficient HER electrocatalysts but also OER electrocatalysts. 141,[148][149][150][151][152][153][154][155] A typical example is the PdNi nanoparticles encapsulated in CNFs (PdNi/CNFs) for both HER and OER applications. 141 The size and uniformity of the PdNi nanoparticles could be tuned by adjusting the molar ratio of the metal precursors.…”

Zeolitic imidazole framework derived N-doped porous carbon/metal cobalt nanoparticles hybrid for oxygen electrocatalysis and rechargeable Zn–air batteries

“…Given the rapid growth of the global energy demand and increasingly severe pollution of the environment, the development of highly efficient materials and technologies for energy storage and conversion is of great signicance. [1][2][3] Among various technologies developed, Zn-air batteries have proven a promising battery system owing to the high theoretical energy density, the appropriate operating voltage ($1.65 V), abundant zinc resources, and free supply of oxygen for the air cathode. [4][5][6] However, the inherent sluggish kinetics of the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), which are the basis of Zn-air batteries, 7 have hampered its development and applications.…”

“…8,[10][11][12][13][14][15][16][17][18] In this regard, metal-organic framework (MOF)-based catalysts have become the focus of electrocatalyst design, given its remarkable advantages including the porous structure, the existence of abundant transition metal, and the easy modication of architecture and composition. 1,15,[19][20][21] Moreover, the evenly dispersed metal species in the MOFderived materials are able to function as active sites for electrochemical reactions. 12,[22][23][24] It has been reported that Co-based MOF electrocatalysts have shown good catalytic activity, while the dissatisfactory bifunctional ORR/OER property, 25,26 the poor electrical conductivity, and aggregation of nanoparticles 19 still limit their practical application in Zn-air batteries.…”

In-situ tracking of phase conversion reaction induced metal/metal oxides for efficient oxygen evolution

“…Though the state-of-the-art precious-metal-based catalysts including IrO 2 and RuO 2 show impressive OER activities, the scarcity and high cost hinder their scale-up deployment [8][9][10]. Therefore, it is of great significance to develop earth-abundant transition metals (especially Fe, Co, and Ni) and their derivatives as highly efficient electrocatalysts for oxygen evolution [11][12][13][14][15][16][17][18][19][20][21][22]. Among the non-noble metal-based electrocatalysts, transition metal oxides (TMOs) and layered doublehydroxides (LDHs) have been well designed with satisfying OER activities [23][24][25][26][27].…”