Patent ID: 9574273
Date: 2017-02-21
CPC Classifications: C23C,Y10T

Claim:
1. A method for preparing a multilayer metal complex, comprising: preparing a first mixed solution by mixing particles of a first metal with a reducing agent; preparing a second mixed solution by mixing a precursor comprising second metal ions with a complexing agent; forming a primary coating layer of a second metal on surfaces of particles of the first metal by preparing a resultant mixture by adding the second mixed solution to the first mixed solution; preparing a third mixed solution by mixing the precursor comprising the second metal ions with the complexing agent; forming a secondary coating layer of the second metal on the primary coating layer by adding the third mixed solution to the resultant mixture, wherein a reduction potential of the second metal is higher than a reduction potential of the first metal, wherein a ratio of molarity of the second metal ions in the precursor to molarity of the complexing agent in the second mixed solution is different than a ratio of molarity of the second metal ions in the precursor to molarity of the complexing agent in the third mixed solution, wherein the ratio of molarity of the second metal ions in the precursor to molarity of the complexing agent in the second mixed solution ranges from 1:10 to 1:30, and wherein the ratio of molarity of second metal ions in the precursor to molarity of the complexing agent in the third mixed solution ranges from 1:4 to 1:10.