Glycine-mediated syntheses of Pt concave nanocubes with high-index {hk0} facets and their enhanced electrocatalytic activities.
Glycine-mediated syntheses of Pt concave nanocubes with high-index {hk0} facets and their enhanced electrocatalytic activities.
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DOI：
10.1021/la302973r
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发表时间：
2012-10
期刊：
影响因子：
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通讯作者：
Zhi-Cheng Zhang;Junfeng Hui;Zhi-Chang Liu;Xin Zhang;Zhuang Jing;Xun Wang
中科院分区：
文献类型：
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作者：
Zhi-Cheng Zhang;Junfeng Hui;Zhi-Chang Liu;Xin Zhang;Zhuang Jing;Xun Wang
具有高折射率面的金属纳米晶体因其优越的催化活性而受到广泛关注。然而，由于hfs具有很高的表面能，在纳米晶体生长过程中保存hfs仍然是一个挑战。在本研究中，成功地在简单水溶液中制备了具有高折射率{hk0}面的高选择性Pt凹纳米立方（cnc）。证明了甘氨酸作为表面控制器在cnc形成过程中的重要作用。与商业Pt黑和Pt/C催化剂相比，这些Pt cnc对甲醇和甲酸的电氧化表现出更高的比活性。
Metal nanocrystals with high-index facets (HIFs) have drawn significant attention for their superior catalysis activity compared to that of low-index faces. However, because of the high surface energy of HIFs, it is still challenging to preserve HIFs during the growth of nanocrystals. In this study, highly selective Pt concave nanocubes (CNCs) with high-index {hk0} facets have been successfully prepared in a simple aqueous solution. The vital role of glycine as the surface controller in the formation of CNCs was demonstrated. These Pt CNCs exhibited enhanced specific activities toward the electro-oxidation of methanol and formic acid in comparison to commercial Pt black and Pt/C catalysts.