Direct synthesis of pure single-crystalline Magneli phase Ti8O15 nanowires as conductive carbon-free materials for electrocatalysis

被引：33
作者：
He, Chunyong [1 ]
Chang, Shiyong [1 ,2 ]
Huang, Xiangdong [2 ]
Wang, Qingquan [2 ]
Mei, Ao [2 ]
Shen, Pei Kang [1 ]
机构：
[1] Sun Yat Sen Univ, Sch Phys & Engn, State Key Lab Optoelect Mat & Technol, Guangzhou 510275, Guangdong, Peoples R China
[2] Guangzhou Automobile Grp Co Ltd, Automot Engn Inst, Guangzhou 510640, Guangdong, Peoples R China
来源：
NANOSCALE | 2015年 / 7卷 / 07期
基金：
中国国家自然科学基金;
关键词：
OXYGEN REDUCTION REACTION; MEMBRANE FUEL-CELLS; METHANOL OXIDATION; TITANIUM-OXIDES; SUPPORTED PLATINUM; ELECTROCHEMICAL ACTIVITY; NANOTUBE ARRAYS; GRAPHENE OXIDE; NANOPARTICLES; ELECTRODES;
D O I：
10.1039/c4nr05806b
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The Magneli phase Ti8O15 nanowires (NWs) have been grown directly on a Ti substrate by a facile one-step evaporation-deposition synthesis method under a hydrogen atmosphere. The Ti8O15 NWs exhibit an outstanding electrical conductivity at room temperature. The electrical conductivity of a single Ti8O15 nanowire is 20.6 S cm(-1) at 300 K. Theoretical calculations manifest that the existence of a large number of oxygen vacancies changes the band structure, resulting in the reduction of the electronic resistance. The Magneli phase Ti8O15 nanowires have been used as conductive carbon-free supports to load Pt nanoparticles for direct methanol oxidation reaction (MOR). The Pt/Ti8O15 NWs show an enhanced activity and extremely high durability compared with commercial Pt/C catalysts.
引用
收藏
页码：2856 / 2861
页数：6
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