Method for preparing nanometer platinum nickel/titanium dioxide nanotube electrode by cyclic voltammeter electrodeposition

Abstract

The invention discloses a method for preparing a nanometer platinum nickel/titanium dioxide nanotube electrode by cyclic voltammeter electrodeposition, and belongs to the technical field of photoelectrocatalysis. A titanium dioxide nanotube array, tidily arranged and vertically oriented, is prepared on a titanium chip by adopting an anodic oxidation method; and then, nanometer metal particles are deposited in nanotubes and on the surfaces of the nanotubes by adopting a cyclic voltammeter electrodeposition method to prepare a nanometer platinum/nickel modified titanium dioxide nanotube electrode. An electrocatalyst preparation method needs no surface active agent, stabilizing agent or functional component in deposition, is simple in process, and is uniform in nanoparticle dispersion; and the prepared electrode can obviously reduce the toxicity of catalyst and improve the electro-catalytic property of the electrode, and is wide in application prospect.

Description

technical field [0001] The invention discloses a method for preparing nano-platinum / nickel-titanium dioxide nanotube electrodes by cyclic voltammetric electrodeposition, which belongs to the technical field of photoelectric catalysis. Background technique [0002] Platinum is currently known as the metal element with the best catalytic activity for the adsorption and dissociation of alcohols, and it is also the electrode material with the best stability in the fuel cell environment, but it is expensive, has low electrocatalytic activity, and is easy to cause Catalyst poisoning (eg CO). Usually, the second and third elements can be added to prepare a multi-component catalyst to improve the performance of the catalyst. Although Pt-based catalysts have the most superior catalytic activity for methanol oxidation, their high cost has always been the core problem limiting their commercial application, and the current research on the modification of Pt-based catalysts can only imp...

AI Technical Summary

Problems solved by technology

However, due to the large difference between the deposition potentials of platinum and nickel, when using the general DC electrochemical deposition method to deposit nano-noble metal particles on nanotubes, the current density is low, hydrogen evolution and concentration polarization are serious, making it difficult to co-deposit platinum and nickel. , and the particles are unevenly dispersed

Our previous studies have shown that nano-platinum electrodes (ZL201210186800.8) can be assembled on the surface of titanium dioxide nanotube arrays by using cyclic voltammetry. However, this pure platinum electrode still has the problem of CO poisoning. In order to solve this problem, this study intends to Pt / Ni composite electrodes are prepared on the surface of titanium dioxide nanotube arrays by cyclic voltammetry electrodeposition. Due to the large difference in the reduction potential of Pt and Ni, it is generally difficult for researchers to use cyclic voltammetry to prepare Pt / Ni composite electrodes. Therefore, there are few reports on the preparation of Pt / Ni composite electrodes on the surface of titania nanotube arrays by cyclic voltammetry deposition.

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