Method of preparing transition metal and alloy thereof through low temperature molten salt electro-deposition

Abstract

A method of preparing transition metal and alloy thereof through low temperature molten salt electro-deposition is characterized by comprising the steps of (1) mixing anhydrous urea, acetamide and anhydrous LiX uniformly and heating and stirring the mixture to form a colorless uniform liquid molten salt; (2) dissolving a transition metal chloride TMCl2 in low temperature molten salt and stirring and mixing the mixture uniformly to form a low temperature molten salt electrolyte; (3) with a copper sheet or stainless steel as a cathode and graphite as an anode, performing electro-deposition in the low temperature molten salt electrolyte at the electrolyzing temperature of 70-90 DEG C in a manner of constant potential and constant current to control the potential or cathode current density; and (4) when the electrolysis is finished, taking the copper sheet or stainless steel out and cleaning and drying it to obtain the transition metal and alloy thereof deposited on the surface of the cathode. The molten salt is low in price and is low in eutectic temperature so that the method is low in cost, is low in electrolysis temperature, is energy-saving, is less in pollution and is slight in corrosion on equipment.

Description

technical field [0001] The invention relates to a method for preparing transition group metals and alloys thereof, in particular to a method for preparing transition group metals and alloys thereof by low-temperature molten salt electrodeposition, and belongs to the technical field of inorganic chemistry. Background technique [0002] Transition metals and their alloys are widely used in the preparation of functional materials such as corrosion resistance, magnetism, electrocatalysis, and magnetic recording due to their special properties. At present, the research on electrodeposition of transition metals and their alloys is mainly concentrated in aqueous solution. Aqueous solution electrolysis has the advantages of low price, low electrolysis temperature and low energy consumption. However, due to the narrow electrochemical window of water, hydrogen evolution reaction usually occurs during the electrodeposition process, resulting in reduced current efficiency and poor coati...

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Problems solved by technology

[0008] The purpose of the present invention is to solve the above-mentioned problems in the prior art, aiming at the problems and deficiencies in the electrodeposition of transition metals in the existing aqueous solution, such as the electroplating process accompanied by hydrogen evolution reaction, low current efficiency and hydrogen embrittlement during the electrodeposition process. In order to solve the problems of poor layer quality and other problems, a method for preparing transition metals and their alloys by low-temperature molten salt electrodeposition is proposed.

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