title: Nanostructured polyaniline-decorated Pt/C@PANI core-shell catalyst with enhanced durability and activity.
abstract: We have designed and synthesized a polyaniline (PANI)-decorated Pt/C@PANI core-shell catalyst that shows enhanced catalyst activity and durability compared with nondecorated Pt/C. The experimental results demonstrate that the activity for the oxygen reduction reaction strongly depends on the thickness of the PANI shell and that the greatest enhancement in catalytic properties occurs at a thickness of 5 nm, followed by 2.5, 0, and 14 nm. Pt/C@PANI also demonstrates significantly improved stability compared with that of the unmodified Pt/C catalyst. The high activity and stability of the Pt/C@PANI catalyst is ascribed to its novel PANI-decorated core-shell structure, which induces both electron delocalization between the Pt d orbitals and the PANI π-conjugated ligand and electron transfer from Pt to PANI. The stable PANI shell also protects the carbon support from direct exposure to the corrosive environment.
authors: State Key Laboratory of Power Transmission Equipment & System Security and New Technology, College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China.
authors: Siguo
authors: S
authors: Chen
authors: Zidong
authors: Z
authors: Wei
authors: XueQiang
authors: X
authors: Qi
authors: Lichun
authors: L
authors: Dong
authors: Yu-Guo
authors: YG
authors: Guo
authors: Lijun
authors: L
authors: Wan
authors: Zhigang
authors: Z
authors: Shao
authors: Li
authors: L
authors: Li