초록 ▼

A carbon nanosphere has at least one opening. The carbon nanosphere is obtained by preparing a carbon nanosphere and treating it with an acid to form the opening. The carbon nanosphere with at least one opening has higher utilization of a surface area and electrical conductivity and lower mass trans

A carbon nanosphere has at least one opening. The carbon nanosphere is obtained by preparing a carbon nanosphere and treating it with an acid to form the opening. The carbon nanosphere with at least one opening has higher utilization of a surface area and electrical conductivity and lower mass transfer resistance than a conventional carbon nanotube, thus allowing for higher current density and cell voltage with a smaller amount of metal catalyst per unit area of a fuel cell electrode.

대표청구항 ▼

1. A method for preparing a carbon nanosphere with at least one opening, comprising: heating copper tartrate in a preheating region;heating the copper tartrate, a dilution gas, and a hydrocarbon gas in a reaction furnace to grow the carbon nanosphere; andtreating the carbon nanosphere with an acid t

1. A method for preparing a carbon nanosphere with at least one opening, comprising: heating copper tartrate in a preheating region;heating the copper tartrate, a dilution gas, and a hydrocarbon gas in a reaction furnace to grow the carbon nanosphere; andtreating the carbon nanosphere with an acid to form the at least one opening,wherein the temperature in the reaction furnace is about 450° C. to about 600° C.,wherein the temperature in the preheating region is about 100° C. to about 200° C., andwherein the residence time in each of the preheating region and the reaction furnace is about 20 to about 40 minutes. 2. The method of claim 1, wherein the concentration of the copper tartrate is about 12.5 g to about 100 g per gram of the carbon nanosphere formed. 3. The method of claim 1, wherein a molar flow rate of the hydrocarbon gas is about 0.0006 to about 0.0025 times a molar flow rate of the dilution gas. 4. The method of claim 3, wherein the hydrocarbon gas is acetylene (C2H2) and the dilution gas is nitrogen. 5. The method of claim 1, wherein the acid is nitric acid.