TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The inorganic metal salt is a hydrated salt. The metal contained in the inorganic metal salt is iron or cobalt.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Process: The baking process is performed at more than 400 degrees C, preferably 700-1000 degrees C. Manufacture of nitrogen-containing carbon alloy further involves pulverizing the precursor, cleaning the baked nitrogen-containing carbon alloy using an acid, pulverizing the baked nitrogen-containing carbon alloy, performing de-aeration and nitrogen-substitution process, and re-baking the nitrogen-containing carbon alloy at 1000-1500 degrees C. Preferred Components: The heteroaromatic ring compound is chosen from 4-(pyridin-4-yl)pyridine, 4-(pyridin-3-yl)pyridine, 3-(pyridin-3-yl)pyridine, 1-methyl-4-(1-methylpyridin-1-ium-4-yl)pyridin-1-ium diiodide, 4-(pyridin-1-ium-4-yl)pyridin-1-ium dichloride, 4-(2-(pyridin-4-yl)ethyl)pyridine, 4-((E)-2-(pyridin-4-yl)ethenyl)pyridine, 3,5-bis(pyridin-4-yl)pyridine, 2,6-bis(pyridin-4-yl)pyridine, 2,4-bis(pyridin-4-yl)pyridine, 4-(3,5-bis(pyridin-4-yl)phenyl)pyridine, 2,4,6-tris(pyridin-4-yl)pyridine, 2,4,6-tris(4-(pyridin-4-yl)phenyl)-1,3,5-triazine, 2,4,6-tris(2-(pyridin-4-yl)ethynyl)-1,3,5-triazine, 2,4-bis(pyridin-4-yl)-1,3,5-triazine, 2-phenyl-4,6-bis(pyridin-4-yl)-1,3,5-triazine, 2,4,6-tris(1H-imidazol-1-yl)-1,3,5-triazine, 2,4,6-tris(pyridin-4-yl)-1,3,5-triazine, 2,4,6-tris(pyridin-3-yl)-1,3,5-triazine, 4-(4,6-bis(1-methylpyridin-1-ium-4-yl)-1,3,5-triazin-2-yl)-1-methylpyridin-1-ium diiodide, 4-(4,5-bis(pyridin-4-yl)-1H-imidazol-2-yl)pyridine, 1-N,3-N,5-N-tris(pyridin-3-yl)benzene-1,3,5-tricarboxamide, 1-N,3-N,5-N-tris(pyridin-4-yl)benzene-1,3,5-tricarboxamide and pyridine compound of formula (a). The nitrogen-containing carbon alloy further contains organometallic complex. The organometallic complex is metal acetate complex or ( beta )-diketone metal complex, preferably iron(II) acetylacetone complex.n=2-10000.