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Effects of Acid Treatment on the Electrocatalysis Properties of PtCuLaOx/C Composite Membrane Materials
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Effects of Acid Treatment on the Electrocatalysis Properties of PtCuLaOx/C Composite Membrane Materials
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Yunnan Provincial Applied Basic Research Foundation (2008ZC007M); Kunming University of Science and Technology Analyze Test Fund (2011071); Foam Metal Materials Innovation Team Project

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    摘要:

    如何提高Pt在薄膜電極上的利用率是相關(guān)研究的熱點(diǎn)。本研究采用離子束濺射沉積技術(shù)(IBS)，在石墨纖維布基底表面制備了PtCuLaOx復(fù)合薄膜催化電極材料。采用X射線衍射儀（XRD）及原子力顯微鏡（AFM）分析了薄膜物相組成及表面結(jié)構(gòu)。在三電極密封電解池體系中采用循環(huán)伏安法（CV）和線性掃描伏安法（LSV）分析不同酸處理?xiàng)l件對(duì)薄膜電催化性能的影響。結(jié)果表明，PtCuLaOx薄膜的晶粒尺寸在30 nm左右，經(jīng)酸處理后晶粒尺寸變大。在溫度50 ℃, 0.5 mol/L的H2SO4溶液中經(jīng)30 min后處理的薄膜樣品，其電化學(xué)活性比表面積（ESA）和交換電流密度（i0）均為最高，其載鉑量?jī)H為0.0802 mg/cm2，具有很高的性價(jià)比

    Abstract:

    It is the hot spot that how to improve the utilization rate of Pt on membrane electrodes. In the present study, the PtCuLaOx composite membrane electrode materials were fabricated on the surface of graphite fibrous cloth by ion beam sputtering (IBS). The phase composition and the surface structure of PtCuLaOx membrane were tested by X-ray diffraction (XRD) and atomic force microscope (AFM). The cyclic voltammetry (CV) and linear sweep voltammetry (LSV) were used to analyze the influence of different acid treatment conditions on the membrane electrocatalysis performance in a tri-electrode system. The results indicate that the PtCuLaOx membrane grain sizes are in the scope about 30 nm, and after acid treatment they become bigger. The sample acid-treated at 50 °C for 30 min in the solution of H2SO4 (0.5 mol/L) has the best electrochemical activity surface area (ESA) and exchange current density (i0). Its platinum loading capacity is only 0.0802 mg/cm2, and has very high ratio of performance to price.

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黃 能,楊 濱,莘明哲,郝鑫禹. Effects of Acid Treatment on the Electrocatalysis Properties of PtCuLaOx/C Composite Membrane Materials[J].稀有金屬材料與工程,2013,42(9):1795~1799.[Huang Neng, Yang Bin, Shen Mingzhe, Hao Xinyu. Effects of Acid Treatment on the Electrocatalysis Properties of PtCuLaOx/C Composite Membrane Materials[J]. Rare Metal Materials and Engineering,2013,42(9):1795~1799.]
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  • 收稿日期:2012-09-19
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