直接在 Sn@CNT 纳米电缆上生长单晶 Pt 纳米线：用于高活性电催化剂的 3D 电极。

Direct growth of single-crystal Pt nanowires on Sn@CNT Nanocable: 3D electrodes for highly active electrocatalysts.

机构信息

Department of Mechanical and Materials Engineering, The University of Western Ontario, London, Ontario, N6 A 5B9, Canada.

出版信息

Chemistry. 2010 Jan 18;16(3):829-35. doi: 10.1002/chem.200902320.

DOI:10.1002/chem.200902320

PMID:20024993

Abstract

A newly designed and fabricated novel three dimensional (3D) nanocomposite composed of single-crystal Pt nanowires (PtNW) and a coaxial nanocable support consisting of a tin nanowire and a carbon nanotube (Sn@CNT) is reported. This nanocomposite is fabricated by the synthesis of Sn@CNT nanocables by means of a thermal evaporation method, followed by the direct growth with PtNWs through a facile aqueous solution approach at room temperature. Electrochemical measurements demonstrate that the PtNW--Sn@CNT 3D electrode exhibits enhanced electrocatalytic performance in oxygen reduction reaction (ORR) for polymer electrolyte membrane fuel cells (PEMFCs), methanol oxidation (MOR) for direct methanol fuel cells (DMFCs), and CO tolerance compared with commercial ETEK Pt/C catalyst made of Pt nanoparticles.

摘要

本文报道了一种由单晶铂纳米线（PtNW）和同轴纳米电缆组成的新型三维（3D）纳米复合材料的设计和制造，该同轴纳米电缆由锡纳米线和碳纳米管（Sn@CNT）组成。该纳米复合材料通过热蒸发法合成 Sn@CNT 纳米电缆，然后通过在室温下的简单水溶液方法直接生长 PtNWs 来制备。电化学测量表明，与商用 ETEK Pt/C 催化剂（由 Pt 纳米颗粒制成）相比，PtNW--Sn@CNT 3D 电极在聚合物电解质膜燃料电池（PEMFCs）中的氧还原反应（ORR）、直接甲醇燃料电池（DMFCs）中的甲醇氧化（MOR）和 CO 耐受性方面表现出增强的电催化性能。