Crystal growth of platinum-ruthenium bimetallic nanocrystallites and their methanol electrooxidation activity

Tsan Yao Chen, Yu Ting Liu, Hong Shuo Chen, Kuan Wen Wang, Cheng Tao Yang, Tzy Jiun Mark Luo, Chih Hao Lee, Tsang Lang Lin

研究成果: 雜誌貢獻期刊論文同行評審

11 引文 斯高帕斯(Scopus)

摘要

This study investigates how the nucleation sequences of Pt and Ru crystallites affect the structure evolutions along with the methanol electrooxidation activity of bimetallic PtRu nanoparticles (BiNPs). We found that the BiNPs crystallites would transform from cubic to tetrakaidecahedron crystals on increasing the Ru content from 0 to 54 at%. This reduces the particle size and the size distributions during the nucleation-growth of the crystal. In the meantime, the unfilled d state and the heteroatomic intermixing of Pt atoms along with the MOR reactivity of the BiNPs will be enhanced. By increasing Ru >54 at%, the BiNPs would transform into an ellipsoid-like crystallite with a Ru rich core. This is because the Pt anions would replace the metallic Ru atoms and form a discrete sub-nano Pt nuclei at the NPs surface. Consequently, the surface MOR activity of the BiNPs is substantially suppressed.

原文???core.languages.en_GB???
頁(從 - 到)3932-3942
頁數11
期刊CrystEngComm
15
發行號19
DOIs
出版狀態已出版 - 21 5月 2013

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