| 任红艳.棒状CeO2负载Pt催化剂的合成及其电化学性能研究[J].分子催化,2015,(2):173-178 |
| 棒状CeO2负载Pt催化剂的合成及其电化学性能研究 |
| Rod-like Ceria Supported Pt as Catalysts for Methanol Oxidation |
| 投稿时间：2015-04-08 修订日期：2015-04-21 |
| DOI： |
| 中文关键词: 棒状CeO2，甲醇氧化，循环伏安法，Pt纳米颗粒 |
| 英文关键词:rod-like CeO2 methanol oxidation cyclic voltammetry Pt nanoparticles |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目） |
|
| 摘要点击次数: 2613 |
| 全文下载次数: 4023 |
| 中文摘要: |
| 通过水热法合成棒状纳米CeO2（CeO2-R），并将Pt纳米颗粒负载于CeO2表面，制得甲醇燃料电池的阳极催化剂Pt/CeO2-R。通过结构与形貌表征，结果表明，Pt/CeO2-R中CeO2的暴露晶面为（111）和（002）晶面，改变了 Pt周围的电子结构，进而降低了Pt-COads的键能，释放出更多的活性位。另外，Pt纳米颗粒在CeO2-R表面分散更均匀。利用电化学工作站 测试阳极催化剂Pt/CeO2-R在酸性溶液中的电化学性能，证明Pt/CeO2-R催化剂的甲醇电氧化性能与抗CO毒害能力较颗粒状CeO2负载Pt催化剂(Pt/CeO2-P)都有很大的提高，证明CeO2-R作为Pt纳米颗粒的载体用于直接甲醇燃料电池的阳极反应具有发展潜力。 |
| 英文摘要: |
| The rod-like CeO2 prepared by hydrothermal method are employed as support for Pt nanoparticles to produce Pt/CeO2-R catalysts for methanol oxidation. The structural and morphological of as-prepared Pt/CeO2-R catalysts are characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM), the characterization results reveal that the exposed crystal of CeO2-R are (111) and (002) planes. The electronic structure around Pt is changed and the bond energy of Pt-COads is weakend. In addition, Pt nanoparticles dispersed more evenly on the surface of CeO2-R. The electrochemical properties are performed in acid solution, using cyclic voltammetry (CV) and chronoamperometry (CA). The results show that and the Pt/CeO2-R catalysts exhibits excellent methanol electro-oxidation performance and super CO tolerance properties. Rod-like CeO2 have been proved to be an attractive support for Pt nanoparticles for methanol oxidation. |
| HTML 查看全文 查看/发表评论 下载PDF阅读器 |
