| 高性能核壳结构催化剂PdRu@Pt/CNT的制备 |
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| 引用本文： | 党岱,高海丽,彭良进,苏允兰,廖世军,王晔.高性能核壳结构催化剂PdRu@Pt/CNT的制备[J].物理化学学报,2011,27(10):2379-2384. |
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| 作者姓名： | 党岱 高海丽 彭良进 苏允兰 廖世军 王晔 |
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| 作者单位： | 1. School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, P. R. China;
2. Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China |
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| 基金项目： | 全国大学生创新项目，国家白然科学基金 |
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| 摘 要： | 采用两步沉积还原法制备了一种以PdRu合金为核、以铂为壳,以碳纳米管(CNT)为载体的核壳结构低铂催化剂PdRu@Pt/CNT.该催化剂对于甲醇催化氧化的单位位质量铂的活性可达自制20%Pt/CNT催化剂的1.7倍,且其正扫和反扫峰的峰电流密度之比(/_f//_b)高达2,是Pt/CNT催化剂/_f//_b值的2倍,表明通过将活性组分铂分散在PdRu核上,有效地提高了金属铂的分散度和铂的利用率,且通过壳层铂原子与核中钌及钯的相互作用,大大提高了催化剂对甲醇氧化中间体的去除能力.X射线衍射(XRD)和透射电子显微镜(TEM)的结果揭示了催化剂的核壳结构.另外,从TEM还可以看出:活性组分均匀地分布在碳纳米管载体上,活性组分粒径约为4.0 nm.由于这种催化剂能够有效提高铂的利用效率,并且有效消除甲醇氧化中间体,在低温燃料电池领域具有良好的应用前景.
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| 关 键 词： | 燃料电池 甲醇氧化 核壳结构 催化剂 |
| 收稿时间： | 2011-04-25 |
| 修稿时间： | 2011-07-15 |
Preparation of High Performance Core-Shell PdRu@Pt/CNT Electrocatalyst |
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| DANG Dai,GAO Hai-Li,PENG Liang-Jin,SU Yun-Lan,LIAO Shi-Jun,WANG Ye.Preparation of High Performance Core-Shell PdRu@Pt/CNT Electrocatalyst[J].Acta Physico-Chimica Sinica,2011,27(10):2379-2384. |
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| Authors: | DANG Dai GAO Hai-Li PENG Liang-Jin SU Yun-Lan LIAO Shi-Jun WANG Ye |
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| Institution: | 1. School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, P. R. China;
2. Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China |
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| Abstract: | We prepared a low Pt loading core-shell structured catalyst PdRu@Pt/CNT(carbon nanotube) with a PdRu alloy as the core and platinum as the shell in addition to carbon nanotubes as supports in a two-stage precipitation-reduction approach.For the anodic oxidation of methanol the activity in terms of Pt loading increased by 70%compared with the lab-made Pt/CNT catalyst and the ratio of the forward current density(I_t) to the backward current density(I_d) was as high as 2,which is two times of that of Pt/ CNT,i... |
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| Keywords: | Fuel cell Methanol oxidation Core-shell structure Catalyst |
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