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Compared to other carbon - ( e . g . , Vulcan XC - 72R ) supported Pd and Pt , the resultant graphene - Pd and Pt composites exhibit better electrocatalytic activity and long - term stability toward alcohol electrooxidation .
 Chemical: carbon; Chemical: Vulcan XC - 72R; Chemical: Pd; Chemical: Pt; Chemical: graphene; Chemical: Pd; Chemical: Pt; Chemical: alcohol
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: carbon; Chemical: Vulcan XC - 72R; Chemical: Pd; Chemical: Pt; Chemical: graphene; Chemical: Pd; Chemical: Pt; Chemical: alcohol