11417
Our experiments indicate indeed that , when the metal alloy domain is attached to the metal oxide domain ( that is , in the dumbbell ) , surface Pd species are more active than in the case of the initial Au ( 0 . 75 ) Pd ( 0 . 25 ) NCs and also Au ( delta - ) sites are formed that were not present on the initial Au ( 0 . 75 ) Pd ( 0 . 25 ) NCs .
 metal oxide, Pd, Au ( 0 . 75 ) Pd ( 0 . 25 ), Au, Au ( 0 . 75 ) Pd ( 0 . 25 )
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 metal oxide, Pd, Au ( 0 . 75 ) Pd ( 0 . 25 ), Au, Au ( 0 . 75 ) Pd ( 0 . 25 )