Method for preparing platinum-coated honeycomb catalyst used in toc water quality measuring device

A method for preparing a platinum-coated honeycomb catalyst used in toc water quality measuring device, the method comprising:

• a honeycomb carrier preparation step (S100) of preparing a honeycomb carrier to be coated with a platinum catalyst;
• a honeycomb carrier cleaning step (S200) of cleaning the prepared honeycomb carrier with a cleaning solution;
• a platinum catalyst coating solution preparation step (S300) of preparing a platinum catalyst coating solution to be coated on the honeycomb carrier;
• a platinum catalyst coating solution applying step (S400) of coating the platinum catalyst coating solution on the honeycomb carrier;
• a drying step (S500) of drying the honeycomb carrier coated with the platinum catalyst coating solution;
• a heat treatment step (S600) of heat-treating the honeycomb carrier coated with the platinum catalyst coating solution;
• and
• a surface treatment step (S700) of adding a reaction gas to the heat-treated honeycomb carrier coated with the platinum catalyst coating solution to form a nitride layer thereon, thereby producing the platinum-coated honeycomb catalyst.