標題: Effect of anodic dissolution in multi-element nanoparticles on methanol electro-oxidation
作者: Hsieh, Yi-Fan
Yeh, Kung-Yu
Wu, Pu-Wei
Hsieh, Yu-Chi
Lin, Pang
材料科學與工程學系
Department of Materials Science and Engineering
關鍵字: Electrode materials;Metals;Electrochemical reactions
公開日期: 3-十一月-2009
摘要: Radio frequency sputter deposition was used to deposit multi-element nanoparticles on carbon clothes for methanol electro-oxidation. Results from energy dispersive spectroscope confirmed the composition was Ft(35)Fe(12)Co(12)Ni(20)Cu(12)Ag(9). X-ray diffraction pattern suggested a fcc phase. An electrochemical de-alloying treatment was conducted in an acidic electrolyte with multiple potential sweeps at a scan rate of 20 mV/s for 0-0.3,0-0.5, and 0-0.7 V, respectively. Images from scanning electron microscope after anodic dissolutions demonstrated considerable variations in surface morphologies. Measurements on hydrogen desorption also revealed substantial increase in electrochemical active surface area. Current responses from cyclic voltammetry indicated the sample of 0-0.5 V anodic dissolution with notable enhancement. In mass activities, the same sample exhibited a comparable value to that Of Pt(43)Ru(57) (C) 2009 Elsevier B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.jallcom.2009.07.055
http://hdl.handle.net/11536/6446
ISSN: 0925-8388
DOI: 10.1016/j.jallcom.2009.07.055
期刊: JOURNAL OF ALLOYS AND COMPOUNDS
Volume: 486
Issue: 1-2
起始頁: 738
結束頁: 742
顯示於類別:期刊論文


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