16415
Furthermore , the optical transparency of the ultrathin Co ( OH ) 2 / Co3O4 coating establishes it as a particularly advantageous treatment for nanostructured water oxidation photoanodes .
 Chemical: Co ( OH ) 2; Chemical: Co3O4
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: Co ( OH ) 2; Chemical: Co3O4