CARBON CATALYST AND MANUFACTURING METHOD THEREOF, AND CATALYST INK AND FUEL BATTERY ARRANGED BY USE OF CARBON CATALYST

• Main Authors: CHIBA TAKEHIRO, KANEDA JUN, WATABE HIROTO, DEGUCHI NAOKI
• Format: Patent
• Language: English; Japanese
• Published: 30.10.2014
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; ELECTRICITY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; THEIR RELEVANT APPARATUS; TRANSPORTING

PROBLEM TO BE SOLVED: To provide a less expensive carbon catalyst including carbon carriers high in electron conductivity and large in specific surface area as an alternative of noble metal catalyst whose usage reduction is required from the viewpoint of cost, resource quantity, etc., and to provide a catalyst ink and a fuel battery which are arranged by use of the carbon catalyst.SOLUTION: A carbon catalyst is produced by steps of: mixing graphene nano-platelet and metal phthalocyanine into a mixture in a dry method; and carbonizing the mixture by performing a thermal treatment thereon in an inert gas atmosphere. If the molar ratio of nitrogen atoms to all of elements located on a material surface is represented by (N), which was measured by X-ray photoelectron spectroscopy (XPS), and the sum total (%) of the percentage of the amount of N1 type nitrogen atoms determined by peak separation from XPS N1 s spectrum, and the percentage of the amount of N2 type nitrogen atoms to a total nitrogen amount of the material surface is represented by (N+N), a surface terminal nitrogen amount {N×(N+N)} is 1.0-13.0. 【課題】本発明が解決しようとする課題は、コスト、資源量などの観点より使用量低減が求められる貴金属触媒の代替として、高い電子伝導性及び比表面積の大きい炭素担体を含む安価な炭素触媒、及び該炭素触媒を用いた触媒インキ並びに燃料電池を提供することにある。【解決手段】グラフェンナノプレートレットと、金属フタロシアニンとを乾式混合する工程と、前記混合物を不活性ガス雰囲気中で熱処理し、炭素化する工程とによって得られ、Ｘ線光電子分光法（ＸＰＳ）によって測定した、材料表面の全元素に対する窒素原子のモル比を（Ｎ）とし、材料表面の全窒素量に対する、ＸＰＳのＮ１ｓスペクトルのピーク分離により求めたＮ１型窒素原子量の割合とＮ２型窒素原子量の割合の合計（％）を（Ｎ1＋Ｎ2）としたときの、表面末端窒素量｛Ｎ?（Ｎ1＋Ｎ2）｝が１．０〜１３．０であることを特徴とする炭素触媒。【選択図】図１