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Citation: ZHANG Hong-Wei, ZHANG Zheng-Fu, LI Yang, YANG Xi-Hun, LIU Shuo. Structural Effects and Electrooxidation Activity of a Two-Dimensional Multilayer PtRu/PtNd Alloy Nanostructure Thin Film[J]. Acta Physico-Chimica Sinica, ;2008, 24(12): 2268-2274. doi: 10.3866/PKU.WHXB20081220 shu

Structural Effects and Electrooxidation Activity of a Two-Dimensional Multilayer PtRu/PtNd Alloy Nanostructure Thin Film

1.
Research Center for Analysis and Measurement, Kunming University of Science and Technology, Kunming 650093, P. R. China; Kunming Institute of Precious Metals, Kunming 650221, P. R. China

Received Date: 21 July 2008
Available Online: 29 October 2008

The two-dimensional multilayer PtRu/PtNd alloy nanostructure thin film used for anode electrodes of micro-directmethanol fuel cells (DMFCs) was fabricated by multi-target ion beamsputtering (IBS). The surface chemical state, structure, surface layer structure, and morphology of the PtRu/PtNd thin-film were characterized by X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), grazing incidence X-ray diffraction (GIXD), and atomic force microscope (AFM). Electrochemical properties were examined by CO-stripping voltammetry, cyclic voltammetry (CV), linear sweep voltammetry (LSV), and chronoamperometry (CA). The structure and surface chemical state of the PtRu/PtNd thin film were found to have changed due to a strong interaction between Pt+, Ru+ and Pt+, Nd+ during the ion beamalternate sputtering deposition process. Abnormal peak widths in the XRD spectra as well as electron transfer between Pt and Nd have also been observed. The PtRu/PtNd thin-film is shown to have a special multiphase structure and electronic structure. The electrochemical activity-specific surface area of PtRu/PtNd thin-film was 115.00 m2·g-1, and therefor PtRu/PtNd thin-film catalysts exhibited higher catalytic activity for methanol electrooxidation in an acidic environment.
- Multi-target ion bean sputtering,
- PtRu/PtNd alloy thin-film,
- Structural effect,
- Electrooxidation
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沈阳化工大学材料科学与工程学院沈阳 110142

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