Pt纳米花的控制合成及其电催化性能

Controlled Synthesis and Electrocatalytic Performances of Pt Nanoflowers

以氯铂酸为前驱体、三缩四乙二醇(TEG)为溶剂和还原剂、聚乙烯吡咯烷酮(PVP)为稳定剂,在一定量KI和十八胺(ODA)存在下,微波辐照加热100s,制备了形貌单一、大小均匀的花状Pt纳米颗粒,利用透射电子显微镜(TEM)、X-射线粉末衍射(XRD)和X-射线光电子能谱(XPS)等对产物进行了表征。结果表明,制备Pt纳米花的最适宜H2PtCl6∶ODA∶KI∶PVP(物质的量比)为3∶10∶12∶35,所制备的Pt纳米花对甲醇氧化的电催化活性是商业铂黑的2.4倍。

Pt Nanoparticles with uniform size and well-defined flower-like structure were synthesized with chloroplatinic acid as precursor,tetraethylene glycol（TEG） as both solvent and reducing agent,polyvinylpyrro- lidone（PVP） as stabilizer in the presence of an appropriate amount of KI and octadecylamine（ODA） under mi- crowave irradiation for 100 s. The products were characterized by transmission electron microscopy（TEM）,X- ray powder diffraction（XRD） and X-ray photoelectron spectroscopy（XPS）. Results showed that the optimum molar ratio of H2PtC16 ： ODA ： KI ： PVP was 3 ： 10 ： 12 ： 35. The electrocatalytic activities of the as-prepared Pt nanoflowers towards methanol oxidation were 2. 4 times of Pt black.