Pseudomorphic Transformation of Layered Simple Hydroxides into Prussian Blue Analogue Nanoplatelets

Abstract

The reactivity of potassium or sodium hexacyanoferrate(II) with transition-metal layered simple hydroxides (LSHs) has been investigated to evaluate the possibility of inserting Prussian Blue analogues (PBAs) into magnetic copper(II) LSHs. This report shows how such a reaction led, unexpectedly, to the direct formation of PBA nanoparticles, the layered hydroxide serving as a metal-ion reservoir. The lamellar structure of the starting LSH collapses and copper-iron PBA nanoparticles were [a] 2031 Figure 2. Left: Structure of Cu 2 (OH) 3 (OAc)·H 2 O [P2 1 , a = 5.5875(4), b = 6.0987(4), c = 18.6801(10) Å, = 91.934(5)°]. [24] The blue polyhedra represent Cu II ions in octahedral sites, the red, grey and white balls represent oxygen, carbon and hydrogen atoms, respectively. Right: Scanning electron micrograph of the hydroxy-acetate used in this work.

Transforming Nickel Hydroxide into 3D Prussian Blue Analogue Array to Obtain Ni2P/Fe2P for Efficient Hydrogen Evolution Reaction

“…Inspired by this method, Rabu has used layer‐structured Cu 2 (OH) 3 (OAc)·H 2 O as both a metal reservoir and a morphological controller. After reacting with K 4 [Fe II (CN) 6 ] for several hours and leached by acid, the PBA layers were obtained . By using this strategy, regular MOFs arrays were produced by other groups and part of the works was listed in Table S1 in the Supporting Information, including the transformation of copper hydroxide to HKUST‐1 networks reported by Kazuyoshi's group and the transformation of zinc oxide to ZIF‐8 membrane reported by Zeng's group .…”

Fabrication of a Hierarchical Ni(OH)2@Ni3S2/Ni Foam Electrode from a Prussian Blue Analogue‐Based Composite with Enhanced Electrochemical Capacitive and Electrocatalytic Properties

“…An Ni(OH) 2 nanosheet array was first grown on NF by a hydrothermal deposition reaction. Then, many highly ordered Ni–Co PBA nanocubes were anchored on the nanosheet surfaces by a pseudomorphic replication method (Figure S1 in the Supporting Information), in which the metastable Ni(OH) 2 phase was replaced by relatively stable Ni–Co PBA crystals. Specifically, the local Ni ions dissolved from the Ni(OH) 2 phase bond with Co(CN) 6 3− to form Ni–Co PBA coordinated at the interface of Ni(OH) 2 nanosheets and the solution.…”

Alternative synthetic approaches for metal–organic frameworks: transformation from solid matters

“…33 Similarly, Cu 2 (OH) 3 (OAc) LSH can also be used to prepare Cu-Fe based Prussian Blue analogues (PBAs) at room temperature. 34 In these cases, Coulomb force can be used for enhancing the interaction between solid matters and ligands. Since they are positively charged, the surfaces of hydroxide host layers easily adsorb the negatively charged organic ligands (e.g., carboxylate anions from deprotonation of carboxylic acids).…”