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Pt摻雜的納米Ni電催化氧化甲醇性能的研究
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國家自然科學(xué)基金（20676088；20776091）；高校博士點(diǎn)基金（200801120010）；太原科技局大學(xué)生創(chuàng)新創(chuàng)業(yè)專項(xiàng)（09122049）資助


Performance of Nano-Ni Doped with Pt for Methanol Electro-catalytic Oxidation
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    摘要:

    采用溶膠凝膠法制備了碳載納米雙金屬Ni-Pt (5%，質(zhì)量分?jǐn)?shù))/C電催化劑，用TEM、XRD和XPS表征金屬粒子的形貌、晶相結(jié)構(gòu)、表面元素及其價(jià)態(tài)，循環(huán)伏安法測試催化劑在堿性溶液中電催化氧化甲醇的活性。結(jié)果表明，Ni-Pt金屬粒子在碳載體上分布均勻，粒徑為3~6 nm，少量Pt的摻雜對納米Ni活性有明顯提高，其中，合金型Ni-Pt (5%)/C在1.0 mol/L NaOH＋1.0 mol/L CH3OH溶液中峰電流密度可達(dá)85.6 mA/mg，是Ni/C峰電流密度的8.7倍，達(dá)到Pt/C峰電流密度的15.3%。單位質(zhì)量鉑的電流顯著提高。

    Abstract:

    Carbon supported nano-nickel-platinum electrocatalyst samples of Ni-Pt (5wt%)/C were prepared by the colloidal-gelatin method. Transmission electron microscopy (TEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) were used to evaluate the metal particles’ morphology, crystal configuration, superficial element constitution and value. Moreover, cyclic voltammeter was employed to measure the catalytic activity for the electro-catalytic oxidation of methanol in an alkaline medium. The results show that Ni-Pt particles are distributed homogeneously on the carbon, with the particle sizes of 3-6 nm; the Pt doping improves largely the activity of Ni nano-particles, and the peak current density of alloy Ni-Pt(5wt%)/C catalyst reaches 85.6 mA/mg in the solution of 1.0 mol/L NaOH + 1.0 mol/L CH3OH, which is 8.7 times of that of Ni/C, and 15.3% of that of Pt/C. The current of Pt per unit mass is increased obviously.

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張忠林,宋 慧,劉世斌,李一兵,郝曉剛,段東紅,孫彥平. Pt摻雜的納米Ni電催化氧化甲醇性能的研究[J].稀有金屬材料與工程,2012,41(1):58~63.[Zhang Zhonglin, Song Hui, Liu Shibin, Li Yibing, Hao Xiaogang, Duan Donghong, Sun Yanping. Performance of Nano-Ni Doped with Pt for Methanol Electro-catalytic Oxidation[J]. Rare Metal Materials and Engineering,2012,41(1):58~63.]
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  • 收稿日期:2010-12-25
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