One-pot synthesis of PtRh/β-CD-CNTs for methanol oxidation
One-pot synthesis of PtRh/β-CD-CNTs for methanol oxidation
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DOI：
10.1016/j.ijhydene.2015.09.021
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发表时间：
2015-11
影响因子：
7.2
通讯作者：
Li Li-Li;C. Tian;Junshuai Yang;Xiaohua Zhang;Jinhua Chen
中科院分区：
文献类型：
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作者：
Li Li-Li;C. Tian;Junshuai Yang;Xiaohua Zhang;Jinhua Chen
以β-环糊精（β-CD）为还原剂和分散剂，采用一锅法水热合成了不同金属组成的PtRh纳米粒子，并将其均匀沉积在β-CD功能化碳纳米管（β-CD-CNTs）上。傅里叶变换红外光谱和热重分析表明，β-CD成功地修饰了碳纳米管。采用透射电镜、X射线衍射和X射线能谱对β-CD-CNTs负载PtRh催化剂（PtRh/β-CD-CNTs）的形貌、化学组成和结构进行了表征。采用典型的电化学技术研究了它们的电化学性能。结果表明，Pt/Rh原子比为1：1的PtRh/β-CD-CNTs催化剂（Pt 1 Rh 1/β-CD-CNTs）对甲醇氧化具有上级电催化性能。此外，与传统NaBH 4还原法制备的酸处理碳纳米管（AO-CNTs）负载PtRh纳米粒子（PtRh/AO-CNTs）相比，Pt 1 Rh 1/β-CD-CNTs负载PtRh纳米粒子的粒径更小、沉积更均匀，对甲醇的电氧化具有更优异的电催化性能。
Taking beta-cyclodextrin (β-CD) as reducting agent and dispersant, PtRh nanoparticles with varied metal composition were uniformly deposited on the β-CD functionalized carbon nanotubes (β-CD-CNTs) by one-pot hydrothermal synthesis method. Fourier transform infrared spectroscopy and thermogravimetric analysis were used to demonstrate the successful modification of CNTs with β-CD. The morphology, chemical composition and structure of the β-CD-CNTs supported PtRh catalysts (PtRh/β-CD-CNTs) have been characterized by transmission electron microscopy, X-ray diffraction and energy dispersive X-ray spectroscopy, respectively. Their electrochemical performances were investigated by typical electrochemical technologies. The results indicate that PtRh/β-CD-CNTs catalyst with 1:1 atomic ratio of Pt/Rh (Pt1Rh1/β-CD-CNTs) shows superior electrocatalytic properties towards methanol oxidation. In addition, compared with the acid-treatment CNTs (AO-CNTs) supported PtRh nanoparticles (PtRh/AO-CNTs) prepared by typical NaBH4reduction, Pt1Rh1/β-CD-CNTs exhibits more excellent electrocatalytic performance for methanol electro-oxidation due to the smaller particle size and more uniform deposition of PtRh nanoparticles.