Alloy nanoparticles, method for forming the alloy nanoparticles, and alloy nanocatalyst comprising the alloy nanoparticles

1 . A method for forming alloy nanoparticles comprising:

mixing a first metal complex including a first metal and a second metal complex including a second metal to form a multimetal compound;

adsorbing the multimetal compound to a support;

heat-treating the multimetal compound to form an alloy compound; and

performing a thermal etching on the alloy compound,

wherein the first metal and the second metal comprise transition metal,

wherein the first metal complex comprises a pyridine-based ligand,

wherein a carbon shell containing N is formed on the surface of the alloy compound by the heat treatment, and

wherein at least a portion of the shell is removed by the thermal etching.

2 . The method for forming alloy nanoparticles of claim 1 , wherein the pyridine-based ligand comprises at least one of a pyridine ligand and a polypyridine ligand,

wherein the pyridine ligand comprises a pyridine and derivatives derived from the pyridine, and

wherein the polypyridine ligand comprises a polypyridine and derivatives derived from the polypyridine.

3 . The method for forming alloy nanoparticles of claim 1 , wherein the second metal complex comprises a halogen element.

4 . The method for forming alloy nanoparticles of claim 1 , wherein the first metal comprises at least one of Fe, Co, and Ni, and the second metal comprises Pt.

5 . The method for forming alloy nanoparticles of claim 1 , wherein the first metal complex comprises M 1 (PY) m a+ (M 1 represents the first metal, PY represents the pyridine-based ligand, and m represents an integer of 6 or less), and

wherein the second metal complex comprises M 2 X n a− (M 2 represents the second metal, X represents a halogen element, and n represents an integer of 6 or less).

6 . The method for forming alloy nanoparticles of claim 1 , wherein the first metal complex comprises [M 1A (PY) m ] x [M 1B (PY) m ] 1-x a+ (M 1A and M 1B each represent the first metal, with M 1B being different from M 1A , PY represents the pyridine-based ligand, and m represents an integer of 6 or less), and

wherein the second metal complex comprises M 2 X n a− (M 2 represents the second metal, X represents a halogen element, and n represents an integer of 6 or less).

7 . The method for forming alloy nanoparticles of claim 1 , wherein the first metal complex and the second metal complex are coupled to each other through electrostatic attraction.

8 . The method for forming alloy nanoparticles of claim 1 , wherein the support comprises a carbon support.

9 . A method for forming alloy nanoparticles comprising:

mixing a first metal complex including a first metal and a second metal complex including a second metal to form a multimetal compound;

adsorbing the multimetal compound to a support; and

heat-treating the multimetal compound to form an alloy compound,

wherein the first metal and the second metal comprise transition metal,

wherein the first metal complex comprises a pyridine-based ligand,

wherein a carbon shell containing N is formed on the surface of the alloy compound by the heat treatment, and

wherein a wetting of the multimetal compound occurs on the support by the heat treatment, and the multimetal compound is decomposed into the alloy compound.

10 . A method for forming alloy nanoparticles comprising:

mixing a first metal complex including a first metal and a second metal complex including a second metal to form a multimetal compound;

adsorbing the multimetal compound to a support;

heat-treating the multimetal compound to form an alloy compound; and

freeze-drying the support to which the multimetal compound is adsorbed before the heat treatment,

wherein the first metal and the second metal comprise transition metal,

wherein the first metal complex comprises a pyridine-based ligand, and

wherein a carbon shell containing N is formed on the surface of the alloy compound by the heat treatment.