期刊
SMALL
卷 13, 期 36, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201701295
关键词
ethanol oxidation; iridium; oxidized Sn; ultrathin nanowires; vein-like
类别
资金
- Ministry of Science and Technology [2016YFA0204100]
- National Natural Science Foundation of China [21571135, 21565002]
- Young Thousand Talented Program
- Soochow University
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Young Scientist Foundation of Jiangxi Province [20133BCB23020]
- Most Foundation of Jiangxi Province [20152ACB21018]
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.
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