Preparation method of nano-metal intercalated hydrotalcite material electrode catalyst

Abstract

The invention provides a preparation method of a nano-metal intercalated hydrotalcite material electrode catalyst, which belongs to the technical field of electrocatalysis and energy. The catalyst isa nano metal intercalation hydrotalcite-like material. The preparation method comprises the steps of intercalating soluble metal coordination compound anions (PtCl4 <2->) between hydrotalcite-like materials (such as magnesium-aluminum hydrotalcite, nickel-iron hydrotalcite and the like) by using an impregnation method; and reducing metal complex anions by using an electrochemical method to successfully prepare the nano metal intercalation hydrotalcite-like compound catalyst (Pt / MgAl-LDH, Pt / NiFe-LDH). PtCl4 <2-> and AuCl4 <-> in different proportions are further intercalated between hydrotalcite-like material layers at the same time. The PtCl4 <2-> and the AuCl4 <-> between the layers are reduced through an electrochemical reduction method, and the PtxAuy / MgAl-LDHs are successfully prepared. The preparation method has the advantages that the preparation process is simple and easy to implement; the catalyst cost is relatively low; the nano metal is uniformly distributed between hydrotalcite layers; and the catalyst has relatively high catalytic activity and poisoning resistance and has excellent electro-catalytic performance in an alkaline methanol fuel cell.

Description

technical field [0001] The invention belongs to the field of preparation of electrode catalysts, and in particular relates to a preparation method of a nanometer metal intercalation hydrotalcite material electrode catalyst. Background technique [0002] Direct methanol fuel cell (Direct Methanol Fuel Cell, DMFC) is a proton exchange membrane fuel cell (Proton Exchange Membrane Fuel Cell, PEMFC) fueled by methanol, which has broad application prospects in automobiles, electronic equipment, aerospace and other fields. Methanol has the characteristics of simple molecular structure, high energy density, low oxidation potential, and abundant sources, so it is often used as a fuel for PEMFC. Platinum (Pt) is a single metal catalyst with high activity found so far, but it is expensive and easily poisoned by intermediate products such as CO, resulting in a sharp decrease in the catalytic activity of the electrode. Therefore, finding and designing anode catalyst materials with high ...

AI Technical Summary

Problems solved by technology

Platinum (Pt) is a single metal catalyst with high activity found so far, but it is expensive and easily poisoned by intermediate products such as CO, resulting in a sharp decrease in the catalytic activity of the electrode.

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