Hopcalite, also known as carbon monoxide catalyst, is a copper and manganese composite oxide composed of CuO and MnO2. It is a high-efficiency catalytic carbon monoxide product with good performance, wide range of uses and high market demand. Hopcalite has a good catalytic effect on carbon monoxide under normal temperature and pressure, and has the advantages of simple synthesis, mild conditions and low industrial synthesis. It is widely used in chemical and metallurgical industry, filter type self-rescue device used in coal mine, gas mask used by firefighters, escape mask used in public places, oxidation tank used by artillery troops, special anti-poison canisters used by the second Artillery corps and so on. Hopcalite has also been widely used in the catalytic treatment of ozone, volatile organic compounds and other harmful gases. At the same time, in fuel cell research, hydrogen-rich hydrogen produced by partial oxidation of low carbon alcohols and hydrocarbons or steam reforming often contains about 0.5-3% (mol) of Co. Carbon monoxide compete with hydrogen and react with oxygen, reducing battery charge-discharge efficiency.