Impact on Structure and Composition of Carbon Supported PtCuLaOx Membrane Electrode by Acid Treatment

Bin Yang; Ming Zhe Shen

doi:10.4028/www.scientific.net/AMM.148-149.1285

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 148-149Impact on Structure and Composition of Carbon...

Impact on Structure and Composition of Carbon Supported PtCuLaO_x Membrane Electrode by Acid Treatment

Abstract:

For the use of Fuel Cells in transportation, one of the key points is to reduce Pt loading in Pt/C catalytic electrode. In the study, PtCuLaO_x heterogeneous membrane manufactured on the surface of carbonaceous substrates by Ion Beam Sputtering technology, and also was treated by different concentration H₂SO₄ solution. Moreover, phase composition, Valence state and Pt loading of these electrodes was analyzed, respectively. It was found that content of doping La in catalytic membrane could increase rich-oxygen ability, and PtCuLaO_x with Pt loading less than 0.041mg/cm² (the electrode area), in which its having complicated valence state, indicated that Pt had mutual effect with Cu, La and O, respectively. In addition, through H₂SO₄ solution treatment and along with increased H₂SO₄ concentration, the orientation growing of Pt(111) would be promoted, and Pt-Pt interval on surface of PtCuLaO_x would reduce owing to Cu was dissolved from (Pt), and average grain size of PtCuLaO_x decreased and crystal face spacing steady. Our study indicated that membrane electrodes through Acid treatment could be used in Fuel Cells and made Fuel Cells have low Pt loading and high catalytic activities, simultaneously.

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Periodical:

Applied Mechanics and Materials (Volumes 148-149)

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1285-1288

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.148-149.1285

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Online since:

December 2011

Authors:

Bin Yang, Ming Zhe Shen

Keywords:

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

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