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Abstract
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Layered double hydroxides due to their high structural flexibility, high anion exchange capacity, large surface area has found various applications in catalysts, photochemistry, pharmacy, removing of pollutants from the environment and drug delivery. Due to some problems with older synthesis methods, many scientists are interested in synthesizing LDHs with electrochemically controlled reactions. Therefore, in this work, different LDHs were precipitated on different graphene-based substrates and their electrocatalytic behavior were investigate in details [1]. Cyclic voltammetry or constant potential techniques can be used to prepare LDHs electrochemically. Here, we have used a constant potential for the LDHs synthesis. For this purpose, LDH-related precursors are placed in the electrochemical cells with certain concentrations and by applying a constant potential for a certain period of time, we perform the electrodeposition process. The prepared LDHs were characterized with XRD,
SEM and cyclic voltammetry in details [2]. For example, to prepare Fe / Ni LDH, 0.09 M Fe(NO3)3.9H2O, 0.12 M Ni(NO3)2.6H2O and 0.15 M KNO3 were placed in an electrochemical cell and a constant potential of -0.8 V for 100 s were applied to the surface of electrode. The results showed that the electrodeposition of LDHs have the advantage of fastness, low cost, ability to control the synthesis and also high electrocatalytic properties for measuring some species.
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