Citation: YANG Yi, LUO Lai-Ming, CHEN Di, LIU Hong-Ming, ZHANG Rong-Hua, DAI Zhong-Xu, ZHOU Xin-Wen. Synthesis and Electrocatalytic Properties of PtPd Nanocatalysts Supported on Graphene for Methanol Oxidation[J]. Acta Physico-Chimica Sinica, ;2017, 33(8): 1628-1634. doi: 10.3866/PKU.WHXB201704242 shu

Synthesis and Electrocatalytic Properties of PtPd Nanocatalysts Supported on Graphene for Methanol Oxidation

1.
College of Biological and Pharmaceutical Science, China Three Gorges University, Yichang 443002, Hubei Province, P. R. China;
2.
College of Materials and Chemical Engineering, China Three Gorges University, Yichang 443002, Hubei Province, P. R. China

Received Date: 23 February 2017
Revised Date: 10 April 2017

Fund Project: The project was supported by the National Natural Science Foundation of China (21403126, 21503120) and Startup Foundation from China Three Gorges University (2016PY074).

This work describes the preparation of three kinds of PtPd/graphene (PtPd/G) nanocatalysts. Graphene oxide was first prepared as the carrier precursor by the Hummers method, and subsequently, the simultaneous reduction of graphene oxide and the metal precursor led to the in situ loading of PtPd on graphene. The fabrication procedure involving liquid phase co-reduction and successive reduction methods utilized the block copolymer P123 as a reducing agent, stabilizer, and morphology control agent. The morphology, structure, and composition of the obtained catalysts were studied by X-ray diffraction (XRD), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). It was found that the catalysts synthesized by the co-reduction method possess a nanodendritic structure, while those prepared by successive reduction exhibit a hollow structure. Cyclic voltammetry and chronoamperometry investigations revealed that the PtPd/G catalyst with a hollow structure displayed the best anti-CO poisoning properties. In contrast, the catalyst with a dendritic structure that had been prepared at 100℃ showed the highest electrocatalytic performance towards methanol oxidation, which was 1.5 times that of the commercial Pt/C electrocatalyst.
- Graphene,
- In situ loading,
- Nanodendritic,
- Hollow structure,
- Methanol oxidation
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沈阳化工大学材料科学与工程学院沈阳 110142