Investigation of Size Effect of Ag Nanoparticles on Oxygen Reduction Reaction Using Ag/Co/C Catalysts Prepared by Galvanic Deposition Method
Investigation of Size Effect of Ag Nanoparticles on Oxygen Reduction Reaction Using Ag/Co/C Catalysts Prepared by Galvanic Deposition Method
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DOI：
10.1007/s10562-015-1658-5
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发表时间：
2015
影响因子：
2.8
通讯作者：
Junya Ohyama;Yui Okata;Yuta Yamamoto;S. Arai;A. Satsuma
中科院分区：
文献类型：
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作者：
Junya Ohyama;Yui Okata;Yuta Yamamoto;S. Arai;A. Satsuma
摘要以碳为载体的钴金属粒子与Ag+离子发生电化学反应，制备出银纳米粒子。不同的制备条件提供了一系列不同尺寸(约2-12 nm)的AgNPs。通过使用不同的AgNPs，考察了尺寸效应对氧还原反应活性的影响。AgNPs的质量活性随颗粒尺寸的减小而增大。另一方面，银的表面积比活性随着颗粒尺寸的减小而降低。
AbstractAg nanoparticles (AgNPs) were prepared by a galvanic reaction between Ag+ions and Co metal particles supported on carbon. Variation of the preparation conditions provided a series of AgNPs with various sizes (ca. 2–12 nm). By using the various AgNPs, the size effect on the oxygen reduction reaction activity was investigated. The mass activity of AgNPs increased with a decrease of the size. On the other hand, the Ag-surface-area-specific activity decreased with a decrease of the size.Graphical Abstract