Polyelectrolyte multilayer thin film catalyst and method for producing same

Abstract

Disclosed herein is a catalyst, including, in one example: a carrier, a polymer electrolyte multilayer film formed on the carrier, and metal particles dispersed in the polymer electrolyte multilayer film. The catalyst can be easily prepared, and can be used to produce hydrogen peroxide in high yield in the presence of a reaction solvent including no acid promoter.

1 . A method of preparing a catalyst, comprising:
 alternately applying a first polymer electrolyte solution and a second polymer electrolyte solution to a carrier to form a polymer electrolyte multilayer film on the carver, wherein the first polymer electrolyte solution and the second polymer electrolyte solution are different from each other, and are cationic or anionic electrolyte solutions, respectively;   applying a metal precursor solution to the carrier including the polymer electrolyte multilayer film formed thereon to disperse metal precursors in the polymer electrolyte multilayer film; and   reducing the metal precursors dispersed in the polymer electrolyte multilayer film to metals using a reducing agent.   
     
     
         2 . A method of preparing a catalyst, comprising:
 alternately applying a first polymer electrolyte solution and a second polymer electrolyte solution to a carrier to form a polymer electrolyte multilayer film on the carrier, wherein the first polymer electrolyte solution and the second polymer electrolyte solution are cationic or anionic electrolyte solutions different from each other, and at least one of the first polymer electrolyte solution and the second polymer electrolyte solution includes metal precursors complexed therewith; and   reducing the metal precursors dispersed in the polymer electrolyte multilayer film to metals using a reducing agent.   
     
     
         3 . The method of preparing a catalyst according to  claim 1 , wherein the cationic or anionic polymer electrolyte solution has a pH of 8˜11, and the metal precursor solution has a pH of 2˜6. 
     
     
         4 . The method of preparing a catalyst according to  claim 1 , wherein the reducing agent is at least one selected from among sodium borohydride (NaBH 4 ), hydrazine (N 2 H 4 ), sodium formate (HCOONa), ammonium hydrogen carbonate (NH 4 HCO 3 ), and hydrogen (H 2 ). 
     
     
         5 . The method preparing a catalyst according to  claim 2 , wherein the reducing agent is at least one selected from among sodium borohydride (NaBH 4 ), hydrazine (N 2 H 4 ), sodium formate (HCOONa), ammonium hydrogen carbonate (NH 4 HCO 3 ), and hydrogen (H 2 ). 
     
     
         6 . A method of producing hydrogen peroxide from hydrogen and oxygen using the catalyst comprising:
 a carrier,   a polymer electrolyte multilayer film formed on the carrier, and   metal particles dispersed in the polymer electrolyte multilayer film.