Catalyst Body For Production of Brush-Shaped Carbon Nanostructure, Process for Producing Catalyst Body, Brush-Shaped Carbon Nanostructure, and Process for Producing the Same

A catalyst body for production of brush-shaped carbon nanostructure comprising

• a substrate,
• a reaction preventive layer formed on the surface of said substrate, and
• a catalyst layer on said reaction preventive layer, wherein
• said catalyst layer is composed of a catalyst metal layer on said reaction preventive layer, and an aggregation suppressive layer formed on the surface of said catalyst metal layer, and
• said aggregation suppressive layer is formed by a metal oxide of a metallic element that composes said catalyst metal layer.

A process for producing catalyst body for production of brush-shaped carbon nanostructure, comprising the steps of

• forming a reaction preventive layer consisting of oxides on the surface of a substrate by heating-treating said substrate,
• forming a catalyst metal layer on the surface of said reaction preventive layer,
• forming an aggregation suppressive layer consisting of metal oxide on the surface of said catalyst metal layer by heat-treating in a temperature range of 80-800° C.,
• granulating uniformly a catalyst layer consisting of said catalyst metal layer and said aggregation suppressive layer by heating at a temperature increase rate equal to or of more than 10° C./sec;
• and
• forming a catalyst particle layer consisting of metallic catalyst particles whose main constituent is a catalyst metal on the surface of said reaction preventive layer.