Abstract: There is provided an in-vehicle power source device having favorable workability for replacing a fuse that melts down when an overcurrent flows to an electric load. A battery selector switch 51 having a current detecting function, a main relay 52 having current detecting function, a bypass relay 54 for bypassing the battery selector switch 51, and a bypass fuse 53 to melt down when an overcurrent flows to a second electric load 35 are provided. The bypass fuse 53 is deployed outside of a case 58 for storing a second power source 34, the bypass fuse 53 and the second power source 34 are connected in series, and when currents detected by the battery selector switch 51 and the main relay 52 are equal to or greater than a predetermined value, the battery selector switch 51 and the main relay 52 are turned off and the bypass relay 54 is closed.

Abstract: An electrocatalyst for ethanol oxidization includes an elemental mixture containing platinum and ruthenium and at least one element, wherein the foregoing at least one element is selected from the group of tungsten, tin, molybdenum, copper, gold, manganese, and vanadium.

Abstract: An electrocatalyst for ethanol oxidization includes an elemental mixture containing platinum and ruthenium and at least one element, wherein the foregoing at least one element is selected from the group of tungsten, tin, molybdenum, copper, gold, manganese, and vanadium.

Abstract: A process for generating power includes (1) generating power from a fuel cell including a fuel electrode, an air electrode and an electrolyte membrane sandwiched therebetween wherein the fuel electrode is made of an alloy including platinum, and a fuel is a liquid including a secondary alcohol, by directly feeding the fuel to the fuel electrode; (2) contacting the air electrode in the fuel cell with an oxidizable material and applying a current from an external electric source between the fuel electrode as negative and the, air electrode as positive, after step (1); and (3) generating power from the fuel cell after step (2).