Support Material Effect for Pt Catalytic Activity at Cathode
International Research Journal of Pure and Applied Chemistry · pp. 541–550 · Published 15 Feb 2014
10.9734/IRJPAC/2014/9624Abstract
The graphene nano sheets (GNS) and nitrogen doped graphene (N-G) were used as supporting materials to deposit Pt particles in order to investigate the support material effect for oxygen reduction reaction (ORR) activity. The ORR activity of platinum on GNS (Pt/GNS) is higher than Pt/N-G catalysts. This suggests that the modification of π states by the N-doping change the properties of the interaction between Pt and carbon. The interaction between Pt and graphene is considered to be π–d hybridization. Therefore, one can control the electronic structure of graphene and Pt by doping of some elements. In addition, the large surface area of N-G due to it has more sites on which the oxygen binding is very strong. It causes the ORR catalytic activity of N-G is lower than GNS.
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