Patent ID: 8349519

Claim:
A titanium electrode material, comprising: a titanium material comprising pure titanium or a titanium alloy; a titanium oxide layer having a thickness of 3 nm or more and 75 nm or less, and having an atomic concentration ratio (O/Ti) of oxygen and titanium at a site having the maximum oxygen concentration in the layer of 0.3 or more and 1.7 or less, on the surface of the titanium material; and an alloy layer comprising at least one noble metal selected from the group consisting of Au, Pt, and Pd, and at least one non-noble metal selected from the group consisting of Zr, Nb, Ta, and Hf, having a content ratio of the noble metal and the non-noble metal (noble metal:non-noble metal) of 35:65 to 95:5 by atomic ratio, and having a thickness of 2 nm or more, on the titanium oxide layer.