16447
Strong effects of cluster size and air exposure on oxygen reduction and carbon oxidation electrocatalysis by size - selected Pt ( n ) ( n <= 11 ) on glassy carbon electrodes .
 Chemical: oxygen; Chemical: carbon; Chemical: Pt ( n ); Chemical: glassy carbon
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: oxygen; Chemical: carbon; Chemical: Pt ( n ); Chemical: glassy carbon