A catalyst for generating hydrogen peroxide induced by temperature difference and a method for environmental disinfection using thereof are provided. The catalyst includes a thermoelectric material distributed on a substrate, and the thermoelectric material can induce a reaction of water vapor and oxygen contained in the air to generate hydrogen peroxide by a temperature difference, thereby performing a antibacterial function using the generated hydrogen peroxide. The method for environmental disinfection using the catalyst is to place the catalyst in an environment with a temperature difference, and without applying a power source, the catalyst can induce a reaction of water vapor and oxygen contained in the air through the temperature difference to generate hydrogen peroxide for disinfection. |