Metal supported catalyst, battery electrode, and battery

A metal-supported catalyst, comprising:

• a carbon carrier;
• and
• catalyst metal particles supported on the carbon carrier,
• wherein, in a photoelectron spectrum obtained by X-ray photoelectron spectroscopy, the metal-supported catalyst exhibits a peak derived from a is orbital of a nitrogen atom, which is separated into the following peaks (1) to (6) of nitrogen atoms:
• (1) a peak of first nitrogen atoms having a peak top in a range of a binding energy of 398.6±0.2 eV;
• (2) a peak of second nitrogen atoms having a peak top in a range of a binding energy of 399.5±0.3 eV;
• (3) a peak of third nitrogen atoms having a peak top in a range of a binding energy of 400.5±0.2 eV;
• (4) a peak of fourth nitrogen atoms having a peak top in a range of a binding energy of 401.3±0.3 eV;
• (5) a peak of fifth nitrogen atoms having a peak top in a range of a binding energy of 403.4±0.4 eV;
• and
• (6) a peak of sixth nitrogen atoms having a peak top in a range of a binding energy of 404.5±0.5 eV,
• wherein a ratio of a peak area of the second nitrogen atoms to a total peak area of the nitrogen atoms of the (1) to (6) measured by the X-ray photoelectron spectroscopy is 0.03 or more, and
• wherein a ratio of a concentration of the second nitrogen atoms to a concentration of carbon atoms measured by the X-ray photoelectron spectroscopy is 0.0005 or more.