|
|||||
|
|
| 金核/铂壳纳米粒子的光化学合成及电催化活性 | |
| 引用本文： | 董颖男,董守安,唐 春,杨喜昆.金核/铂壳纳米粒子的光化学合成及电催化活性[J].稀有金属材料与工程,2013,42(4):789-792. |
| 作者姓名： | 董颖男 董守安 唐 春 杨喜昆 |
| 作者单位： | 1. 昆明贵金属研究所稀贵金属综合利用新技术国家重点实验室,云南昆明650106;沈阳工程学院,辽宁沈阳110136 2. 昆明贵金属研究所稀贵金属综合利用新技术国家重点实验室,云南昆明,650106 3. 昆明理工大学,云南昆明,650093 |
| 摘 要： | 在含不同摩尔比的Au(Ⅲ)和Pt(Ⅳ)离子的PEG(聚乙二醇)-丙酮溶液中,采用光化学共还原法合成了一组Au@Pt复合纳米粒子,并以炭黑分别对其负载制成Au@Pt/C催化剂。借助于UV-Vis、TEM和HR-TEM的表征,证实复合纳米粒子为球形的核/壳结构;分别以XPS、EDS和电化学方法分析了复合粒子的化学状态、结构特点和Au@Pt/C催化剂的催化性质。结果表明,不同Au:Pt摩尔比的Au@Pt/C催化剂对甲醇氧化反应具有良好的催化活性和稳定性,其中Au:Pt=1:1时形成的Au@Pt/C催化剂电催化活性最高,约为商品Pt/C催化剂的4倍。简要讨论了核/壳结构产生高催化活性的主要原因。 |
| 关 键 词： | 光化学合成 Au核@Pt壳 复合纳米粒子 甲醇 电催化作用 |
| 收稿时间： | 2012/4/25 0:00:00 |
Photochemical Synthesis and Electro-catalytic Activity of Au Core/Pt Shell Composite Nanoparticles |
|
| Dong Yingnan,Dong Shouan,Tang Chun and Yang Xikun.Photochemical Synthesis and Electro-catalytic Activity of Au Core/Pt Shell Composite Nanoparticles[J].Rare Metal Materials and Engineering,2013,42(4):789-792. | |
| Authors: | Dong Yingnan Dong Shouan Tang Chun and Yang Xikun |
| Affiliation: | 1. State Kay Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, Kunming Institute of Precious Metals, Kunming 650106, China) (2. Shenyang Institute of Engineering, Shenyang 110136, China) (3. Kunming University of Science and Technology, Kunming 650093, China) |
| Abstract: | A series of Au@Pt composite nanoparticles was synthesized by photochemical coreduction in the PEG-acetone aqueous solutions containing Au(III) and Pt(IV) ions with different molar ratios. The resulting composites were supported on carbon black for preparing Au@Pt/C catalysts, respectively. By the characterization of UV-Vis spectrum, TEM and HR-TEM, a spherical Au core Pt shell composite nano-structure was confirmed. The chemical state and structure character of the composite nanoparticles and the catalytic property of Au@Pt/C catalysts were analyzed by XPS, EDS and electrochemical method, respectively. The results show that all of Au@Pt/C catalysts with different Au:Pt molar ratios have high catalytic activity and stability for methanol oxidation; among them, the catalytic activity of the Au@Pt/C catalyst formed at Au:Pt=1:1 is the highest and is about 4 times than that of commercial Pt/C catalyst. The primary cause of high catalytic activity of the core/shell structure was discussed. |
| Keywords: | photochemical synthesis Au core@Pt shell composite nanoparticle methanol electro-catalysis |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |
| 点击此处可从《稀有金属材料与工程》浏览原始摘要信息 | |
| 点击此处可从《稀有金属材料与工程》下载全文 | |