# US 2013/0153411 A1 · Electrode base, negative electrode for aqueous solution electrolysis using same, method for producing the electrode base, and method for producing the negative electrode for aqueous solution electrolysis > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0153411 A1 - Document ID: US20130153411A1 - Status: Published application - Kind: A1 - Application number: 13/579,092 - Filed: 2011-02-17 - Published: 2013-06-20 - Earliest claimed: 2010-02-17 - Assignees: Chlorine Engjneers Corp., Ltd. - Inventors: Sanae Ishimaru - Web page: https://patentgrep.com/patent/US20130153411A1 ## CPC - C25B 11/091: consisting of at least one catalytic element and at least one catalytic compound; consisting of two or more catalytic elements or catalytic compounds - C25B: ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR (anodic or cathodic protection C23F13/00; single-crystal growth C30B) ## Abstract The negative electrode for aqueous solution electrolysis of the present invention includes a conductive substrate having a nickel surface, a mixture layer including metal nickel, a nickel oxide and carbon atoms, formed on the conductive substrate surface, and an electrode catalyst layer formed on the mixture layer surface, wherein the electrode catalyst layer is formed by a layer including a platinum group metal or a platinum group metal compound. The negative electrode for aqueous solution electrolysis of the present invention is preferably used in electrolysis of an aqueous solution of an alkali metal halide, and the like. ## Claims ### Claim 1 An electrode base for forming an electrode catalyst layer comprising a mixture layer including metal nickel, a nickel oxide and carbon atoms formed on a surface of a conductive substrate having a nickel surface. ### Claim 2 (depends on 1) The electrode base according to claim 1, wherein the mixture layer is formed by applying a nickel compound including a nickel atom, a carbon atom, an oxygen atom and a hydrogen atom to the surface of the conductive substrate, and performing a thermal decomposition. ### Claim 3 (depends on 2) The electrode base according to claim 2, wherein the nickel compound is either of a nickel formate and a nickel acetate. ### Claim 4 A negative electrode for aqueous solution electrolysis comprising: a conductive substrate having a nickel surface; a mixture layer including metal nickel, a nickel oxide and carbon atoms, formed on the surface of the conductive substrate; and an electrode catalyst layer including a platinum group metal or a platinum group metal compound, formed on a surface of the mixture layer. ### Claim 5 (depends on 4) The negative electrode for aqueous solution electrolysis according to claim 4, wherein the electrode catalyst layer further includes a lanthanoid compound. ### Claim 6 (depends on 5) The negative electrode for aqueous solution electrolysis according to claim 5, wherein the electrode catalyst layer is formed by thermally decomposing an electrode catalyst layer-forming solution including a ruthenium nitrate and a lanthanum acetate at 400° C. to 600° C. in an atmosphere containing oxygen. ### Claim 7 (depends on 6) The negative electrode for aqueous solution electrolysis according to claim 6, wherein the electrode catalyst layer-forming solution further includes a platinum compound. ### Claim 8 (depends on 5) The negative electrode for aqueous solution electrolysis according to claim 5, wherein the electrode catalyst layer includes a cerium oxide and platinum. ### Claim 9 A method for producing an electrode base for forming an electrode catalyst layer, the method comprising the steps of: applying a nickel compound including a nickel atom, a carbon atom, an oxygen atom and a hydrogen atom to a surface of a conductive substrate having a nickel surface; and performing thermal decomposition at 250° C. to 600° C. in an atmosphere containing oxygen, thereby forming a mixture layer including metal nickel, a nickel oxide and carbon atoms. ### Claim 10 (depends on 9) The method for producing an electrode base according to claim 9, wherein the nickel compound is either of a nickel formate and a nickel acetate. ### Claim 11 A method for producing a negative electrode for aqueous solution electrolysis comprising the steps of: producing an electrode base by applying a nickel compound including a nickel atom, a carbon atom, an oxygen atom and a hydrogen atom to a surface of a conductive substrate having a nickel surface, and performing thermal decomposition at 250° C. to 600° C. in an atmosphere containing oxygen, thereby forming a mixture layer including metal nickel, a nickel oxide and carbon atoms; and forming an electrode catalyst layer by applying an electrode catalyst layer-forming solution including a platinum group metal compound to a surface of the mixture layer of the electrode base, and performing thermal decomposition in an atmosphere containing oxygen. ### Claim 12 (depends on 11) The method for producing a negative electrode for aqueous solution electrolysis according to claim 11, wherein the nickel compound is either of a nickel formate or a nickel acetate. ### Claim 13 (depends on 11) The method for producing a negative electrode for aqueous solution electrolysis according to claim 11, wherein the electrode catalyst layer-forming solution includes a ruthenium nitrate and a lanthanum acetate, and the electrode catalyst layer is formed by applying this electrode catalyst layer-forming solution to the surface of the mixture layer of the electrode base and then performing thermal decomposition at 400° C. to 600° C. in an atmosphere containing oxygen. ### Claim 14 (depends on 13) The method for producing a negative electrode for aqueous solution electrolysis according to claim 13, wherein the electrode catalyst-forming solution further includes a platinum compound. ### Claim 15 (depends on 11) The method for producing a negative electrode for aqueous solution electrolysis according to claim 11, wherein the electrode catalyst layer-forming solution further includes a cerium nitrate.