A catalyst including active particles that have a core including a first metal oxide, and a shell including an alloy of a second metal with a reduction product of the first metal oxide; a method of preparing the catalyst; a fuel cell including the catalyst; an electrode for lithium air battery that includes the active particles; and a lithium air battery including the electrode. Adjustable mounts on the splints can be moved to a variety of different locations with respect to the splint main body housings and bone connectors can be rotated into a variety of positions within the mounts. Specifically, using an inductor-capacitor lattice based delay element to enable high-performance CT pipeline ADC and CT delta-sigma ADC. The two air control units are each disposed in the passage close to the lid. The first molding is formed on the LED and the second molding is formed on the first molding. The plurality of chambers have a fluid path circulating a coolant or a heat medium in the walls so that a temperature of the plurality of chambers is rapidly changed at the test process of the semiconductor devices between a first temperature that is less than room temperature and a second temperature that is greater than room temperature.