| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a membrane electrode junction for a solid polymer fuel cell capable of keeping a high output voltage for an extended period, with an initial output voltage being high. <P>SOLUTION: A catalyst layer 4a of an anode and/or a catalyst layer 4b of a cathode of a membrane electrode junction 10 comprises at least one kind of compound from among phosphoric acid zirconium having a two-dimensional layer structure where crystallization water is contained by two or more molecules per zirconium atom, phosphoric acid zirconium having amorphous structure with crystallization water contained, phosphoric acid zirconium having three-dimensional network structure with crystallization water contained, and M<SB>2y/1</SB>Zr(PO<SB>4</SB>)<SB>2y</SB>SiO<SB>2</SB>-nH<SB>2</SB>O [M is hydrogen atom or metal atom, 1 represents numerical value corresponding to the valence of M, 0<2y<1, n>0]. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
