Electrode for chlorine evolution and manufacturing method therefor

Abstract

The present disclosure relates to an electrode for chlorine evolution including a niobium-ruthenium-titanium composite oxide particle layer formed on a porous titanium metal substrate and a method for manufacturing the same.

1 . An electrode for chlorine evolution comprising:
 a porous titanium metal substrate; and   a niobium-ruthenium-titanium composite oxide particle layer formed on the porous titanium metal substrate,   wherein the porous titanium metal substrate has a microstructure on the surface and includes a titanium dioxide layer doped with niobium, and   the niobium-ruthenium-titanium composite oxide particle layer contains niobium-ruthenium-titanium composite oxide particles composed of: a core represented by the following Chemical Formula 1; and a titanium dioxide shell:   
       
         
           
           
               
               
           
         
         In the above formula, 0<x<1, 0<y<1, and 0<x+y<1. 
       
     
     
         2 . The electrode for chlorine evolution of  claim 1 , wherein x is 0.30 or more to 0.50 or less. 
     
     
         3 . The electrode for chlorine evolution of  claim 1 , wherein y is 0.05 or more to 0.15 or less. 
     
     
         4 . The electrode for chlorine evolution of  claim 1 , wherein the shell is a single layer, and the shell has a thickness of 1 Å or more to 8 Å or less. 
     
     
         5 . The electrode for chlorine evolution of  claim 1 , wherein the niobium-ruthenium-titanium composite oxide particles have an average particle diameter of 1.0 nm or more to 3.0 nm or less. 
     
     
         6 . The electrode for chlorine evolution of  claim 1 , wherein the niobium-doped titanium dioxide layer and the niobium-ruthenium-titanium composite oxide particle layer have a total thickness of 30 nm or more to 50 nm or less. 
     
     
         7 . The electrode for chlorine evolution of  claim 1 , wherein the niobium-ruthenium-titanium composite oxide particle layer contains 0.0001 g or more to 0.0003 g or less of ruthenium per 1 cm 2  of the porous titanium metal substrate unit surface area. 
     
     
         8 . The electrode for chlorine evolution of  claim 1 , wherein the titanium metal substrate is in the form of a foam. 
     
     
         9 . A method for manufacturing an electrode for chlorine evolution according to  claim 1 , the method comprising steps of:
 forming a titanium dioxide layer on the surface by oxidizing a porous titanium metal substrate;   coating a niobium precursor solution on the porous titanium metal substrate having the titanium dioxide layer formed thereon and then manufacturing a porous titanium metal substrate having a niobium-doped titanium dioxide layer formed thereon through a first hydrothermal reaction;   coating a ruthenium precursor solution on the porous titanium metal substrate having the niobium-doped titanium dioxide layer formed thereon and then depositing ruthenium on the niobium-doped titanium dioxide layer by performing a second hydrothermal reaction; and   heat-treating the porous titanium metal substrate having the ruthenium-deposited niobium-doped titanium dioxide layer formed thereon.   
     
     
         10 . The method of  claim 9 , wherein the step of forming a titanium dioxide layer on the surface by oxidizing a porous titanium metal substrate is performed at a temperature of 50° C. or more to 90° C. or less for a time of 20 minutes or more to 40 minutes or less. 
     
     
         11 . The method of  claim 9 , wherein the niobium precursor solution has a niobium precursor content of 0.005 mol % or more to 0.015 mol % or less. 
     
     
         12 . The method of  claim 9 , wherein the first hydrothermal reaction is performed at a temperature of 150° C. or more to 200° C. or less for a time of 5 hours or more to 8 hours or less. 
     
     
         13 . The method of  claim 9 , wherein the ruthenium precursor solution has a ruthenium precursor content of 0.01 mol % or more to 0.02 mol % or less. 
     
     
         14 . The method of  claim 9 , wherein the second hydrothermal reaction is performed at a temperature of 130° C. or more to 180° C. or less for a time of 8 hours or more to 15 hours or less. 
     
     
         15 . The method of  claim 9 , wherein the heat treatment is performed at a temperature of 150° C. or more to 250° C. or less.