Sulfated zirconia as a proton conductor for fuel cells: Stability to hydrolysis and influence on catalysts

Satoshi Tominaka, Toshiyuki Momma, Bruno Scrosati, Tetsuya Osaka*

*この研究の対応する著者

研究成果: Article査読

22 被引用数 (Scopus)

抄録

Sulfated zirconia is an inorganic solid superacid having sulfate groups covalently bonded to its surface. In this work, sulfated zirconia is synthesized by a solvent-free method to obtain it in the nanoparticle form. This nanostructured sulfated zirconia has been evaluated in terms of (i) chemical stability to hydrolysis and to hydrogen peroxide by thermogravimetric analysis, and (ii) influences on Pt catalyst activity by cyclic voltammetry using sulfated-zirconia dispersion as a supporting electrolyte solution. The results demonstrate that our sulfated zirconia is stable almost perfectly to hydrolysis but partly decomposed by a Fenton reagent containing hydrogen peroxide and Fe2+. In addition, we show that oxygen reduction activity of Pt catalyst in a sulfated-zirconia dispersion is comparatively high (specific activity at 0.9 V vs. RHE, i0.9: ca. 17 μA cm-2) compared to that in a 0.5 M sulfuric acid solution (i0.9: ca. 15 μA cm-2). Finally, we demonstrate that sulfated zirconia does not influence hydrogen oxidation reaction. These results lead us to conclude that sulfated zirconia is a promising proton conductor for fuel cells.

本文言語English
ページ(範囲)4065-4071
ページ数7
ジャーナルJournal of Power Sources
195
13
DOI
出版ステータスPublished - 2010 7月 1

ASJC Scopus subject areas

  • 再生可能エネルギー、持続可能性、環境
  • エネルギー工学および電力技術
  • 物理化学および理論化学
  • 電子工学および電気工学

フィンガープリント

「Sulfated zirconia as a proton conductor for fuel cells: Stability to hydrolysis and influence on catalysts」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル