25000
We find that the higher activity of interfacial sites in Au13 / TiO2 ( 110 ) towards methanol decomposition originates from charge - transfer - induced Coulomb interaction among the gold , reactant , and reducible TiO2 support , brought about through the formation of an ionic O - Au bond between gold and methoxy in such sites , which turns the participating perimeter gold atom cationic .
 Chemical: Au13 / TiO2 ( 110 ); Chemical: methanol; Chemical: TiO2; Chemical: O - Au; Chemical: methoxy
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: Au13 / TiO2 ( 110 ); Chemical: methanol; Chemical: TiO2; Chemical: O - Au; Chemical: methoxy