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CTAB溶液中納米Pd粒子的形貌控制及對甲醛的電催化氧化活性
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國家自然科學(xué)基金（51074007）


Morphology Control of Palladium Nanoparticles in CTAB Aqueous Solution and Their Electrocatalytic Activity for the Oxidation of Formaldehyde
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    摘要:

    超聲輻射添加微量十六烷基三甲基溴化銨(CTAB)的PdCl2溶液，合成得到納米Pd粒子，用XRD、TEM、選區(qū)電子衍射(SAED)、HRTEM和低溫氮吸附-脫附等技術(shù)進(jìn)行了表征?？疾炝薈TAB用量對納米Pd粒子形貌的影響，并通過循環(huán)伏安法研究了納米Pd粒子修飾玻碳電極對甲醛的電催化活性。結(jié)果表明，改變CTAB/PdCl2的摩爾比可以調(diào)控納米Pd粒子的粒徑和形貌；當(dāng)CTAB與PdCl2 的摩爾比為1:1、超聲反應(yīng)50 min時(shí)，得到的納米Pd粒子呈六邊形，粒徑大約為8 nm，比未添加CTAB樣品的比表面積增大了10 m2/g，對甲醛有較高的電催化活性。

    Abstract:

    Palladium nanoparticles were prepared by adding a small quantity of hexadecyl trimethyl ammonium bromide (CTAB) into the palladium (Ⅱ) chloride aqueous solution using ultrasonics. The samples were characterized by XRD, TEM, selected area electron diffraction (SAED), HRTEM and low temperature nitrogen adsorption-desorption. The effect of CTAB amount on the growth morphology of palladium nanoparticles was also investigated. The electrocatalytic properties of the nano-Pd modified glassy carbon (Pd/GC) electrode for formaldehyde oxidation were investigated by cyclic voltammetry. The results indicate that the size and the morphology of the nano-Pd particles can be controlled by adjusting the mole ratios of CTAB to PdCl2. The hexagonal nano-Pd particles with a narrowly distributed size of 8 nm are obtained when the mole ratio of CTAB to PdCl2 is 1:1 and the ultrasonic reaction time is 50 min. The nanoparticles obtained by CTAB addition possess larger BET surface area compared to that without surfactant by 10 m2/g, thus showing the excellent electrocatalytic activity for the formaldehyde oxidation.

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王艷麗,張明旭,譚德新. CTAB溶液中納米Pd粒子的形貌控制及對甲醛的電催化氧化活性[J].稀有金屬材料與工程,2013,42(4):837~840.[Wang Yanli, Zhang Mingxu, Tan Dexin. Morphology Control of Palladium Nanoparticles in CTAB Aqueous Solution and Their Electrocatalytic Activity for the Oxidation of Formaldehyde[J]. Rare Metal Materials and Engineering,2013,42(4):837~840.]
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  • 收稿日期:2012-04-27
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