文章基本信息

标题：Facet-dependent electrochemical properties of Co₃O₄ nanocrystals toward heavy metal ions
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作者：Xin-Yao Yu ; Qiang-Qiang Meng ; Tao Luo 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2013
卷号：3
DOI：10.1038/srep02886
出版社：Springer Nature
摘要：We revealed an interesting facet-dependent electrochemical behavior toward heavy metal ions (HMIs) based on their adsorption behaviors. The (111) facet of Co₃O₄ nanoplates has better electrochemical sensing performance than that of the (001) facet of Co₃O₄ nanocubes. Adsorption measurements and density-functional theory (DFT) calculations reveals that adsorption of HMIs is responsible for the difference of electrochemical properties. Our combined experimental and theoretical studies provide a solid hint to explain the mechanism of electrochemical detection of HMIs using nanoscale metal oxides. Furthermore, this study not only suggests a promising new strategy for designing high performance electrochemical sensing interface through the selective synthesis of nanoscale materials exposed with different well-defined facets, but also provides a deep understanding for a more sensitive and selective electroanalysis at nanomaterials modified electrodes.