A heteroepitaxially grown two-dimensional metal–organic framework and its derivative for the electrocatalytic oxygen reduction reaction

Abstract

Two-dimensional (2D) metal-organic frameworks (MOFs) have become a hot topic recently for their high surface areas, larger number of exposed active sites, and improved conductivity. Combination of different 2D MOFs...

Metal–organic framework-derived advanced oxygen electrocatalysts as air-cathodes for Zn–air batteries: recent trends and future perspectives

“…A 2D zeolitic imidazolate framework possessing a leaf-like morphology (ZIF-L), high N content and layer by layer structure was utilized as a template to synthesize ZIF-L-Zn@ZIFCo via epitaxial growth. 120 Subsequently, ZIF-L-Zn@ZIFCo was further pyrolyzed to obtain a hetero-epitaxially grown MOF-derived Co, N co-doped carbon-based catalyst (HM-Co@NC) (Fig. 10c).…”

“…Reproduced with permission. 120 by Cao's group via the pyrolysis of a yolk-shell structured MOF with encapsulated iron-porphyrin (ZIF-L and FeTPP@ZIF-8). 125 FeCo-C/N showed Pt-like ORR behavior (Fig.…”

2D Metal–organic framework derived Co/CoSe2 heterojunctions with interfacial electron redistribution as bifunctional electrocatalysts for urea-assisted rechargeable Zn–air batteries

“…31 In addition, the metal Zn of ZIF has evaporated away in the heat treatment process, forming a porous structure that facilitates the transport of gases. 32 Upon the selenization process conducted at 500 °C in Se vapor, the Co nanoparticles are partially transformed into CoSe 2 nanoparticles by the reaction with Se vapor and nally, Co/ CoSe 2 @CNx is obtained. The corresponding SEM image of Co/ CoSe 2 @CNx is shown in Fig.…”

A bimetallic 3D interconnected metal–organic framework with 2D morphology and its derived electrocatalyst for oxygen reduction

“…[40][41][42][43][44] However, for the nonporous dense ZIF-L, crystal nanoparticles would completely collapse and lose the benefits from the parental precursors, such as two-dimensional (2D) morphology, when using Zn ions as metal centers with low hetero-metal doping. 45,46 Recently, we prepared the novel ZIF-EC1 (EC stands for electron crystallography) with high N and Zn ion content. Its structure has been solved by using electron crystallography due to its small crystal size.…”