立方体钯纳米颗粒的控制合成及其电催化性能  

Controlled Synthesis of Cubic Pd Nanoparticles and Their Electrocatalytic Performances

作　　者：王欢[1] 曾蓓蓓[1] 贺星[1] 李冬晓[1] 赵燕熹[1] 黄涛[1] 

机构地区：[1]中南民族大学化学与材料科学学院催化材料科学国家民委-教育部重点实验室,湖北武汉430074

出　　处：《广州化工》2016年第9期43-45,共3页GuangZhou Chemical Industry

基　　金：国家自然科学基金资助项目(21273289)

摘　　要：以乙酰丙酮钯为前驱体,甲醛为还原剂,聚乙烯吡咯烷酮(PVP)为保护剂,N,N-二甲基甲酰胺(DMF)为溶剂,在一定量碘化钾存在下,采用油浴法快速合成出形貌单一、大小均匀的立方体Pd纳米颗粒,平均粒径约10 nm。利用透射电子显微镜(TEM)、扫描电子显微镜(SEM)、X-射线粉末衍射(XRD)、X-射线光电子能谱(XPS)等对产物进行了表征。制备Pd纳米立方体的最适宜Pd(acac)_2:PVP:KI摩尔比为1:9:4。所制备的Pd纳米立方体对甲酸电氧化的催化活性是商业Pd黑的1.8倍。Pd nanoparticles with uniform size and well-defined cubic structures were synthesized with palladium acetylacetonate as a precursor , formaldehyde as a reducing agent , polyvinylpyrrolidone （ PVP） as a stabilizer, N, N-dimethyl formamide as a solvent in the presence of an appropriate amount of KI by oil-bath heating for 3 h.The products were characterized by transmission electron microscopy （ TEM ） , scanning electron microscopy （ SEM ） , X-ray photoelectron spectroscopy （XPS） and X-ray powder diffraction （XRD）.The optimum molar ratio of Pd（acac）2：PVP：KI for the preparation of Pd nanocubes was 1：9：4.The electrocatalytic activities of the as-prepared Pd nanocubes towards formic acid oxidation demonstrated 1.8 times greater than that of Pd black .

关 键 词：钯 乙酰丙酮钯 聚乙烯吡咯烷酮 甲醛 电催化 

分 类 号：O643.3[理学—物理化学]