Pd-Ag合金纳米线的可见光辅助简易合成及其对乙醇的电催化氧化
Pd-Ag Alloy Nanowires: Facile Visible-Light-Assisted Synthesis and Electrocatalytic Activity toward Ethanol Oxidation
作者单位E-mail
谭德新 岭南师范学院化学化工学院, 湛江 524048 tdxin@163.com 
王艳丽 岭南师范学院化学化工学院, 湛江 524048 ylwang1998@163.com 
摘要: 以硝酸钯和硝酸银为金属前驱体,乙醇和柠檬酸钠作为还原剂,聚乙烯吡咯烷酮作为稳定剂和导向剂,以普通市售白炽灯作为光源,采用简易可见光辅助液相法合成了Pd-Ag合金纳米线。通过FESEM、TEM、HRTEM、PXRD和UV-Vis等技术对样品的形貌、晶体结构和光学性质进行了表征,并通过循环伏安法和计时电流法研究了Pd-Ag合金纳米线修饰玻碳电极对乙醇的电催化氧化。与相同条件下制备的纳米钯材料相比,Pd-Ag合金纳米线具有更好的电催化活性、抗中毒性和稳定性。
关键词: Pd-Ag合金  纳米线  可见光  乙醇  电催化
基金项目: 国家自然科学基金(No.51303005)、广东省科技发展专项资金项目(No.2017A030307028)、扬帆计划引进紧缺拔尖人才项目(No.0003017011)和岭南师范学院校级科研项目(No.1170917014)。
Abstract: Using palladium nitrate and silver nitrate as the metal precursor, ethanol and sodium citrate tribasic dehydrate as reducing agents and poly(vinyl pyrrolidone) (PVP) as a stabilizer and guiding agent, Pd-Ag alloy nanowires were synthesized via visible-light-assisted solution approach with a commercial incandescent lamp as light source. The morphologies, crystal structure and optical properties were characterized by field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM), power X-ray diffraction (PXRD), and UV-visible spectroscopy, respectively. The electrocatalytic properties of the Pd-Ag alloy nanowires modified glassy carbon electrode for ethanol oxidation were investigated by cyclic voltammetry and chronoamperometry. The Pd-Ag alloy nanowires exhibited much better electrocatalytic performance than Pd nanoparticles toward ethanol oxidation reaction in alkaline media in terms of the electrocatalytic activity, anti-poisoning ability and stability.
Keywords: Pd-Ag alloy  nanowires  visible light  ethanol  electrocatalysis
投稿时间:2017-11-09 修订日期:2018-01-22
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谭德新,王艳丽.Pd-Ag合金纳米线的可见光辅助简易合成及其对乙醇的电催化氧化[J].无机化学学报,2018,34(4):777-783.
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