| abstract |
A proton-conductive solid electrolyte member has an electrolyte layer and an anode layer. The electrolyte layer contains a metal oxide having a perovskite crystal structure. The anode layer contains Fe 2 O 3 and the metal oxide. The metal oxide is a metal oxide expressed by the following formula [1], or a mixture or a solid solution of a metal oxide expressed by the following formula [1]: A a B b M c O 3-δ , where A denotes one element selected from the group consisting of Ba and Ca; B denotes one element selected from the group consisting of Ce and Zr; M denotes one element selected from the group consisting of Y, Yb, Er, Ho, Tm, Gd, In, and Sc; a is a number satisfying 0.85≤a≤1; b is a number satisfying 0.50≤b≤1; c is a number satisfying c=1−b; and δ is an oxygen deficiency amount. |