PDDA修饰的碳纳米管载铂电催化剂的合成及其在碱性条件下的氧气还原反应催化性能

doi:10.3866/PKU.WHXB201507161

Abstract

Abstract:

Multi-walled carbon nanotubes (MWCNTs) were modified with the long-chain polymer poly (diallyldimethylammonium chloride) (PDDA) and used as support for Pt nanoparticles (NPs). Pt/PDDA/ MWCNTs electrocatalysts were prepared by electrostatic adsorption of Pt NPs on the PDDA/MWCNTs support. Transmission electron microscopy (TEM) and X-ray diffraction (XRD) characterization revealed that the Pt NPs were well dispersed on the PDDA/MWCNTs support, with an average diameter of ~3.6 nm. Thermo gravimetric analysis showed that the loading of Pt was 36%(w). Rotating disk electrode (RDE) measurements showed that the Pt/PDDA/MWCNTs catalyst had excellent electrocatalytic activity for oxygen reduction in alkaline medium. Compared with commercial Pt/C (40%(w)), the Pt/PDDA/MWCNTs catalyst exhibited a positive shift of 30 mV for the oxygen reduction onset and half-wave potential. Kinetics study further confirmed the significantly enhanced oxygen reduction activity of the Pt/PDDA/MWCNTs catalyst in the alkaline medium.

Key words: Platinum, Poly(diallyldimethylammonium chloride), Multi-walled carbon nanotubes, Oxygen reduction reaction

Jie. ZHANG,Mei-Ling. DOU,Feng. WANG,Jing-Jun. LIU,Zhi-Lin. LI,Jing. JI,Ye. SONG. Synthesis of PDDA-Decorating MWCNTs Supported Pt Electrocatalysts and Catalytic Properties for Oxygen Reduction Reaction in Alkaline Medium[J]. Acta Phys. -Chim. Sin. 2015, 31(9), 1727-1732. doi: 10.3866/PKU.WHXB201507161

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Synthesis of PDDA-Decorating MWCNTs Supported Pt Electrocatalysts and Catalytic Properties for Oxygen Reduction Reaction in Alkaline Medium

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