Porous nanoparticle catalyst for methane conversion and method of preparing the same

1 . A porous nanoparticle catalyst for methane conversion, comprising,

a first metal oxide and a second metal oxide,

wherein the first metal oxide includes CuO,

wherein the second metal oxide includes CeO 2 ,

wherein the porous nanoparticle catalyst is a porous CuO/CeO 2 nanoparticle catalyst and a size of the porous CuO/CeO 2 nanoparticle catalyst based on a single particle diameter is 0.3 μm to 1.5 μm, and

wherein the porous CuO/CeO 2 nanoparticle catalyst includes pores formed using glycerin.

2 . The porous nanoparticle catalyst for methane conversion of claim 1 ,

wherein a molar ratio of the first metal oxide: the second metal oxide is 8:2 to 4:6.

3 . The porous nanoparticle catalyst for methane conversion of claim 1 ,

wherein the first metal oxide, the second metal oxide, and an oxygen are uniformly dispersed.

4 . The porous nanoparticle catalyst for methane conversion of claim 1 ,

wherein a specific surface area of the porous nanoparticle catalyst for methane conversion is 30 m 2 /g to 60 m 2 /g.

5 . The porous nanoparticle catalyst for methane conversion of claim 1 , wherein the porous nanoparticle catalyst is configured to convert a methane to at least one of the products selected from methanol, ethanol, 1-propanol, 2-propanol, and acetone.

6 . The porous nanoparticle catalyst for methane conversion of claim 5 ,

wherein a selectivity of the methanol among the products is 65% or more.

7 . The porous nanoparticle catalyst for methane conversion of claim 5 ,

wherein a productivity of the methanol is 200 μmol/g cat /hr to 2000 μmol/g cat /hr.

8 . The porous nanoparticle catalyst for methane conversion of claim 1 ,

wherein the methane conversion is carried out at a room temperature.

9 . The porous nanoparticle catalyst for methane conversion of claim 1 ,

wherein the methane conversion is carried out at a pressure of 1 bar to 15 bar.

10 . The porous nanoparticle catalyst for methane conversion of claim 1 ,

wherein the methane conversion is carried out using a solar cell.

11 . A method of preparing the porous nanoparticle catalyst for methane conversion according to claim 1 , comprising:

dissolving a first metal precursor and a second metal precursor in an alcohol and performing a first heat treatment in the presence of glycerin to obtain a metal mixture; and

washing the metal mixture with an organic solvent and performing a second heat treatment for removing the glycerin to obtain the porous nanoparticle catalyst for methane conversion.

12 . The method of claim 11 ,

wherein the first heat treatment is performed at 150° C. to 200° C.

13 . The method of claim 11 ,

wherein the first heat treatment is performed for 5 hours to 10 hours.

14 . The method of claim 11 ,

wherein the second heat treatment is performed at 300° C. to 400° C.

15 . The method of claim 11 ,

wherein the second heat treatment is performed for 1 hour to 5 hours.

16 . A catalyst electrode, comprising the porous nanoparticle catalyst for methane conversion according to claim 1 .