Dissolution and surface area loss of platinum nanoparticles under potential cycling

Yu Sugawara, Amar Prasad Yadav, Atsushi Nishikata, Tooru Tsuru

研究成果: Article査読

31 被引用数 (Scopus)

抄録

The relationship between dissolution and loss of the electrochemically active surface area (ECA) of Pt nanoparticles under potential cycling was investigated in a 0.5 M H2SO4 solution at 298 K. The nanoparticles were prepared on an Au electrode by electrodeposition in a 40 mM H2PtCl6 solution. Potential cycling was performed for 300 cycles in two different potential ranges: 0.0-1.0 V and 0.0-1.4 V. In both the potential ranges, ECA exhibited rapid loss during the first 100 cycles, but there were no significant changes in Pt dissolution. Pt dissolution was significantly enhanced by shifting the upper potential limit from 1.0 to 1.4 V, but ECA was not affected. On the basis of this result, it is expected that ECA loss was mainly due to agglomeration of Pt rather than electrochemical Ostwald ripening.

本文言語English
ページ(範囲)379-383
ページ数5
ジャーナルJournal of Electroanalytical Chemistry
662
2
DOI
出版ステータスPublished - 2011 11 15
外部発表はい

ASJC Scopus subject areas

  • 分析化学
  • 化学工学(全般)
  • 電気化学

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