| abstract |
[Problem] To provide a technique for manufacturing a composite at low temperature through use of an easily handled reducing agent. [Solution] A technique for manufacturing a composite in which a metal simple substance derived from a reduced cation, a metal oxide, or both are supported on a carrier, said technique including at least: a preparation step for preparing a liquid-phase mixture containing at least an alcohol compound as a first reducing agent, phosphinic acid or a salt thereof as a second reducing agent, a carrier, and a source compound for supplying one or more positive ions selected from the group including Au, Ag, Cu, Pt, Rh, Ru, Re, Pd, and Ir; and a reducing step for reducing the positive ion in the liquid-phase mixture. |