Ultrathin Vein-Like Iridium-Tin Nanowires with Abundant Oxidized Tin as High-Performance Ethanol Oxidation Electrocatalysts

被引：50

作者：

Zhu, Meiwu ^{[1
,2
]}

Shao, Qi ^{[2
]}

Pi, Yecan ^{[2
]}

Guo, Jun ^{[3
]}

Huang, Bin ^{[1
]}

Qian, Yong ^{[1
]}

Huang, Xiaoqing ^{[2
]}

机构：

[1] East China Univ Technol, Jiangxi Prov Key Lab Polymer Micro Nano Mfg & Dev, Nanchang 330013, Jiangxi, Peoples R China

[2] Soochow Univ, Coll Chem Chem Engn & Mat Sci, Suzhou 215123, Jiangsu, Peoples R China

[3] Soochow Univ, Testing & Anal Ctr, Suzhou 215123, Jiangsu, Peoples R China

来源：

SMALL | 2017年 / 13卷 / 36期

基金：

中国国家自然科学基金;

关键词：

ethanol oxidation; iridium; oxidized Sn; ultrathin nanowires; vein-like; FACILE SYNTHESIS; EFFICIENT; NANOCRYSTALS; CATALYSTS; ELECTROOXIDATION; PD; NANOPARTICLES; SURFACE; FACETS; ARRAYS;

D O I：

10.1002/smll.201701295

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Iridium (Ir) holds great promise for ethanol oxidation reaction (EOR), while its practical applications suffer from the limited shape-controlled synthesis due to its low-energy barrier for nucleation. To overcome this limitation, the preparation of a new class of ultrathin vein-like Ir-tin nanowires (IrSn NWs) with abundant oxidized Sn is reported. By tuning the ratio of Ir to Sn, the optimized Ir67Sn33/C exhibits the highest mass density of 95.6 mA mg(-1) Ir for EOR at low potential (0.04 V), which is 4.1-fold and 20-fold higher than that of Ir/C and the commercial Pt/C, respectively. It also exhibits the smallest Tafel slope of 153 mV dec(-1) and superior stability after 2 h chronoamperometric measurement. Electrochemical measurements and X-ray photoelectron spectra results confirm that the abundant oxidized Sn promotes a complete oxidization of ethanol into CO2 at low potential. This work highlights the importance of non-noble metal on enhancing the EOR performance.

引用

页数：8

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