Phase-transfer interface promoted corrosion from PtNi10 nanoctahedra to Pt4Ni nanoframes
Phase-transfer interface promoted corrosion from PtNi10 nanoctahedra to Pt4Ni nanoframes
复制标题
相转移界面促进了从 PtNi10 纳米八面体到 Pt4Ni 纳米框架的腐蚀
DOI：
10.1007/s12274-014-0603-z
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Yadong Li
中科院分区：
文献类型：
--
作者：
Yu Wang;Yueguang Chen;Caiyun Nan;Lingling Li;Dingsheng Wang;Qing Peng;Yadong Li
发展了一种研究PtNi10纳米八面体腐蚀的两相新方法。在这一策略中，油溶型PtNi10纳米八面体中的活性成分镍被腐蚀，然后在乙二胺四乙酸酯(EDTA)的配位下转移到下水相。由于EDTA促进的相转移界面的存在，在温和的条件下，腐蚀反应加速进行。具体来说，首次成功地制备了八面体Pt4Ni纳米骨架的产物，并且当EDTA-2Na的用量减少时，可以得到PtNi4多孔八面体。在系统地研究了这一两相体系后，提出了一个“协同腐蚀”机制来解释八面体Pt4Ni纳米骨架的形成，这涉及到许多物种(即O2、H2O、H+、OAm和EDTa4−)的贡献。由于Pt4Ni纳米骨架和PtNi4多孔八面体具有迷人的三维几何结构，这两种腐蚀的纳米晶在碱性介质中对乙醇的电氧化和硝基苯的加氢反应都表现出了比未腐蚀的PtNi10纳米八面体更好的活性。
AbstractA novel two-phase approach towards the corrosion of PtNi10 nanoctahedra has been developed. In this strategy, the active component of Ni in oil-soluble PtNi10 nanoctahedra which resided in the upper toluene phase, suffered from etching and was then transferred into a lower aqueous phase with coordination by ethylenediaminetetraacetate (EDTA). Due to the existence of the phase-transfer interface promoted by EDTA, the corrosion reaction proceeded at an accelerated rate under the mild conditions. Specifically, the resultant products of octahedral Pt4Ni nanoframes were successfully fabricated for the first time, and PtNi4 porous octahedra could be obtained when the dosage of EDTA-2Na was reduced. After a systematic study of this two-phase system, a “synergetic corrosion” mechanism is proposed to account for the formation of octahedral Pt4Ni nanoframes, involving contributions from many species (i.e., O2, H2O, H+, OAm, and EDTA4−). As a result of the fascinating three-dimensional geometry of Pt4Ni nanoframes and PtNi4 porous octahedra, both of the corroded nanocrystals showed superior activity over the pristine PtNi10 nanoctahedra for ethanol electrooxidation in alkaline media and hydrogenation of nitrobenzene.
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影响因子：
7.3
作者：
Shang-Wei Chou;Ying-Ren Lai;Ya Yun Yang;Chih‐Yuan Tang;M. Hayashi;Hsieh-Chih Chen;Hui-Lung Chen;P. Chou
通讯作者：
Shang-Wei Chou;Ying-Ren Lai;Ya Yun Yang;Chih‐Yuan Tang;M. Hayashi;Hsieh-Chih Chen;Hui-Lung Chen;P. Chou
影响因子：
4.9
作者：
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通讯作者：
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影响因子：
8.6
作者：
Xu, Zhichuan;Shen, Chengmin;Sun, Shouheng
通讯作者：
Sun, Shouheng
影响因子：
13.3
作者：
Zhicheng Zhang;Yong Yang;Farhat Nosheen;Peng-peng Wang;Jing-chao Zhang;Zhu Jing;Xun Wang
通讯作者：
Zhicheng Zhang;Yong Yang;Farhat Nosheen;Peng-peng Wang;Jing-chao Zhang;Zhu Jing;Xun Wang
影响因子：
3.9
作者：
Crespo-Quesada, Micaela;Andanson, Jean-Michel;Kiwi-Minsker, Lioubov
通讯作者：
Kiwi-Minsker, Lioubov