16413
The optimal coating - 1 ALD cycle , which amounts to < 1 monolayer of Co ( OH ) 2 / Co3O4 - resulted in significantly enhanced photoelectrochemical water oxidation performance .
 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