Preparation of High Porous Ni-YSZ Cermets Electrodes and Their Application for Methanol Oxidation

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• 作者：Eric M. Garcia (1)
  Hosane A. Tar?co (2)
  Tulio Matencio (1)
  Rosana Z. Domingues (1)
  Ione M. F. de Oliveira (1)
  Hallen D. R. Calado (1)
  Vanessa F. C. Lins (3)
  
• 关键词：Methanol oxidation ; Ni ; YSZ cermet ; DMFCs
• 刊名：Electrocatalysis
• 出版年：2013
• 出版时间：June 2013
• 年：2013
• 卷：4
• 期：2
• 页码：71-75
• 全文大小：522KB
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• 作者单位：Eric M. Garcia (1)
  Hosane A. Tar?co (2)
  Tulio Matencio (1)
  Rosana Z. Domingues (1)
  Ione M. F. de Oliveira (1)
  Hallen D. R. Calado (1)
  Vanessa F. C. Lins (3)
  
  1. Chemistry Department, Federal University of Minas Gerais, Av. Ant?nio Carlos, 6627, Belo Horizonte, Minas Gerais, Brazil, 13565-905
  2. University of S?o Jo?o Del Rei, Campus Sete Lagoas, Km 424-BR 040, Sete Lagoas, Minas Gerais, Brazil, 13565-905
  3. Chemical Engineering, Federal University of Minas Gerais, Av. Ant?nio Carlos, 6627, Belo Horizonte, Minas Gerais, Brazil, 13565-905
  
• ISSN：1868-5994

文摘

This paper describes briefly the use of Ni-YSZ (yttrium oxide doped with 8?% in mol of zirconium oxide) for methanol oxidation in 1.0?mol?L? KOH solution. The Ni-YSZ has a great performance for methanol oxidation reaching a current density around 160?mA?cm?. This value is at least four times greater than in platinum electrode. The high performance of Ni-YSZ compared with Pt electrode can also be viewed in measures electrochemical impedance spectroscopy. The Ni-YSZ shows the charge transfer resistance around 1.80?Ohm?cm2. Thus, in our material, the effect of NiO(OH) barrier is drastically reduced. The chronoamperograms for methanol oxidation at potential equal to 1.0?V shows that the charge density for Ni-YSZ electrode is about four times larger than in Pt electrode.