9309
The electroreduction of benzoic acid : voltammetric observation of adsorbed hydrogen at a platinum microelectrode in room temperature ionic liquids .
 Chemical: benzoic acid; Chemical: hydrogen; Chemical: platinum
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: benzoic acid; Chemical: hydrogen; Chemical: platinum