Atomic Force Microscopy of the Dissolution of Cubic and Tetrahedral Pt Nanoparticles in Electrochemical Environments
详细信息 查看全文
- 作者：Yusaku Onochi ; Masashi Nakamura ; Nagahiro Hoshi
- 刊名：The Journal of Physical Chemistry C
- 出版年：2012
- 出版时间：July 19, 2012
- 年：2012
- 卷：116
- 期：28
- 页码：15134-15140
- 全文大小：435K
- 年卷期：v.116,no.28(July 19, 2012)
- ISSN：1932-7455
文摘
The dissolution of cubic and tetrahedral Pt nanoparticles has been studied on a Pt plate in 0.1 M NaClO4 using conventional in situ atomic force microscopy (AFM). The Pt nanoparticles were dissolved during the potential cycle between 0.0 and 1.1 V (Ag/AgCl). The sides of the nanoparticles are dissolved faster than the upper parts. The height of cubic Pt nanoparticles does not change up to 200 cycles, shrinking to 80% of the initial height after 600 cycles. Tetrahedral Pt nanoparticles are dissolved from the top, forming a terrace at the upper part after 300 cycles. The durability of cubic Pt nanoparticles is higher than that of tetrahedral Pt nanoparticles.