Influence on Structure and Composition of Carbon Supported PtCu-LaOx Composite Membrane Electrode by Acid Treatment

Bin Yang; Ming Zhe Shen

doi:10.4028/www.scientific.net/AMR.415-417.2097

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 415-417Influence on Structure and Composition of Carbon...

Influence on Structure and Composition of Carbon Supported PtCu-LaO_x Composite Membrane Electrode by Acid Treatment

Abstract:

In order to reduce production cost of Fuel Cells, one of the key points was to reduce Pt loading in Pt/C catalytic electrode. In our study, a new type of Pt/C membrane electrodes, PtCu-LaO_x composite structure, on the surface of carbonaceous substrates was manufactured by Ion Beam Sputtering technology, and also was treated in different concentration H₂SO₄ solution. Phase composition, surface topography and microarea elements of these electrodes were analyzed by X-ray Diffraction, Scanning Electron Microscopy combined with Energy Dispersive Spectrometry, respectively. It was found that PtCu-LaO_x composite membrane with Pt loading less than 0.045mg/cm² (the electrode area), and that the orientation growing of Pt(111) and Pt(200) would be promoted, and that Pt-Pt interval on surface of PtCu-LaO_x would reduce owing to Cu was dissolved from (Pt) through H₂SO₄ solution treatment, and that average grain size of PtCu-LaO_x decreased and crystal face spacing steady along with rising concentration.

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Periodical:

Advanced Materials Research (Volumes 415-417)

Pages:

2097-2100

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.415-417.2097

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Online since:

December 2011

Authors:

Bin Yang, Ming Zhe Shen

Keywords:

Acid Treatment, Composition, Fuel Cell (FC), PtCuLaO_x, Structure

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