NOVELTY - A reformer (100) has a preliminary reactor (101a) in which hydrocarbon compound and hydrogen peroxide are reacted to generate hydrogen and water, and a steam reformation reactor (101b) which is connected to the preliminary reactor and in which unreacted hydrocarbon compound is reacted with water using heat generated from the preliminary reactor to generate hydrogen. An exothermic reaction catalyst (122) is dispersed in the preliminary reactor. A steam reformation catalyst (124) is dispersed in the steam reformation reactor.    USE - Reformer is used for reforming fuel cell (claimed) such as direct methanol fuel cell, polymer electrolyte fuel cell and reformed hydrogen fuel cell for mobile telephone, personal digital assistance, digital camera, notebook computer and electronic device.    ADVANTAGE - The reformer reforms fuel without separate external heat source, and has high capacity and methanol conversion rate.    DETAILED DESCRIPTION - A reformer has a preliminary reactor in which hydrocarbon compound and hydrogen peroxide are reacted to generate hydrogen and water, and a steam reformation reactor which is connected to the preliminary reactor and in which unreacted hydrocarbon compound is reacted with water using heat generated from the preliminary reactor to generate hydrogen. An exothermic reaction catalyst is dispersed in the preliminary reactor to promote reaction between hydrocarbon compound and hydrogen peroxide. A steam reformation catalyst is dispersed in the steam reformation reactor to promote reaction between hydrocarbon compound and steam. The hydrocarbon compound is methanol. The exothermic reaction catalyst is zirconium-platinum catalyst containing alumina, platinum and zirconium.    DESCRIPTION OF DRAWING(S) - The drawing shows the cross-sectional view of a reformer. (Drawing includes non-English language text)    Reformer (100)    Preliminary reactor (101a)    Steam reformation reactor (101b)    Thermal insulator (105)    Exothermic reaction catalyst (122)    Steam reformation catalyst (124)