Electroplating solution for manufacturing nanometer platinum and platinum based alloy particles and method thereof

Abstract

The present invention generally relates to an electroplating solution for manufacturing nanometer platinum and platinum based alloy particles and a method thereof. That is, an acid solution having platinum complex compound and citric acid is provided into a reaction tank to be as an electroplating solution, then a plurality of platinum and platinum based alloy particles are deposited on the surfaces of electrodes under the condition of applying negative potentials. The acid solution is capable of effectively providing the rate of conducting ions. The citric acid can effectively promote the dispersity of the platinum and platinum based alloy particles and reduce the dimensions the platinum and platinum based alloy particles.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention generally relates to an electroplating solution for manufacturing nanometer platinum and platinum based alloy particles and a method thereof, more particularly to that adding citric acid into the electroplating solution in order to nanometerize the platinum and platinum based alloy particles deposited on the surfaces of electrodes, and diffuse them averagely.[0003]2. Description of the Prior Art[0004]At present, the world relies on fossil energy that is the main source of energy, but limited oil reserves. After five decades, oil production capacity will be inadequate, it can be expected that a human energy crisis will be encountered in the near future. High oil prices impact the livelihood of people and the brunt of industry, such as everything from industrial use, home use of electricity, transportation dynamic energy, consumer electronics, mobile communications products, etc., which are all the n...

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Benefits of technology

[0017]The primary objective of the present invention is to provide the electroplating solution for manufacturing the nanometer platinum and platinum based alloy particles and the method thereof. That is, an acid solution having citric acid with a suitable concentration is provided to be as an electroplating solution while in an electroplating process. The citric acid is both a dispersant and a stabilizer and nanometerizes the platinum and platinum based alloy particles deposited on the surfaces of electrodes under the condition of not affecting the oxidation reaction of platinum and transition metal complex compound on the surfaces of the electrodes, wherein the oxidation reaction is the reduction of metal ions, and a better dispersity is achieved in order to break through a bottle neck that the catalyst metal particles in the electroplating process cannot be nanometerized. Such that, the application of the catalyst electrodes of a fuel cell can maximized.

[0018]The secondary objective of the present invention is to provide the electroplating solution for manufacturing the nanometer platinum and platinum based alloy particles and the method thereof. That is, an acid solution having citric acid and lactic acid with a suitable concentration is provided to be as an electroplating solution while in an electroplating process. The citric acid is both a dispersant and a stabilizer and nanometerizes the platinum and platinum based alloy particles deposited on the surfaces of electrodes under the condition of not affecting the oxidation reaction of platinum and transition metal complex compound on the surfaces of the electrodes, wherein the oxidation reaction is the reduction of metal ions, and a better dispersity is achieved in order to break through a bottle neck that the catalyst metal particles in the electroplating process cannot be nanometerized. Such that, the application of the catalyst electrodes of a fuel cell can maximized.

[0019]The third objective of the present invention is to provide the electroplating solution for manufacturing the nanometer platinum and platinum based alloy particles and the method thereof. That is, an acid solution having citric acid and boric acid with a suitable concentration is provided to be as an electroplating solution while in an electroplating process. The citric acid is both a dispersant and a stabilizer and nanometerizes the platinum and platinum based alloy particles deposited on the surfaces of electrodes under the condition of not affecting the oxidation reaction of platinum and transition metal complex compound on the surfaces of the electrodes, wherein the oxidation reaction is the reduction of metal ions, and a better dispersity is achieved in order to break through a bottle neck that the catalyst metal particles in the electroplating process cannot be nanometerized. Such that, the application of the catalyst electrodes of a fuel cell can maximized.

[0020]The fourth objective of the present invention is to provide the electroplating solution for manufacturing the nanometer platinum and platinum based alloy particles and the method thereof. That is, an acid solution having citric acid and sulfuric acid with a suitable concentration is provided to be as an electroplating solution while in an electroplating process. The citric acid is both a dispersant and a stabilizer and nanometerizes the platinum and platinum based alloy particles deposited on the surfaces of electrodes under the condition of not affecting the oxidation reaction of platinum and transition metal complex compound on the surfaces of the electrodes, wherein the oxidation reaction is the reduction of metal ions, and a better dispersity is achieved in order to break through a bottle neck that the catalyst metal particles in the electroplating process cannot be nanometerized. Such that, the application of the catalyst electrodes of a fuel cell can maximized.

[0021]The fifth objective of the present invention is to provide the electroplating solution for manufacturing the nanometer platinum and platinum based alloy particles and the method thereof. That is, an acid solution having citric acid and glycol with a suitable concentration is provided to be as an electroplating solution while in an electroplating process. The citric acid is both a dispersant and a stabilizer and nanometerizes the platinum and platinum based alloy particles deposited on the surfaces of electrodes under the condition of not affecting the oxidation reaction of platinum and transition metal complex compound on the surfaces of the electrodes, wherein the oxidation reaction is the reduction of metal ions, and a better dispersity is achieved in order to break through a bottle neck that the catalyst metal particles in the electroplating process cannot be nanometerized. Such that, the application of the catalyst electrodes of a fuel cell can maximized.

[0022]The sixth objective of the present invention is to provide the electroplating solution for manufacturing the nanometer platinum and platinum based alloy particles and the method thereof. That is, an electroplating solution having at least citric acid is provided into a reaction tank, continuously a suitable cathode and anode are selected, and then a suitable potential is applied, so that the best nanometer platinum and platinum based alloy particles can be made.

Problems solved by technology

At present, the world relies on fossil energy that is the main source of energy, but limited oil reserves.

After five decades, oil production capacity will be inadequate, it can be expected that a human energy crisis will be encountered in the near future.

Recently, the most problem to DMFC is the low conversion efficiency thereof, so current research may focus on the development of high activity electrode catalyst.

Such ways also increase the junction impedance of DMFC so as to lower down the efficiency of a fuel cell, that is, the development of DMFC is seriously blocked.

Further, the chemical reduction takes longer time and sodium ions and potassium ions are deposited on the carbon carrier simultaneously so as to cause additional pollutions.

However, the use of electroplating making metal particle size is usually 20 nm or more, that would make the surface area of the catalyst significantly lower, and in the field of catalytic chemistry, it will be a considerable obstacle.

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