Core-shell Au@Pd nanoparticles with enhanced catalytic activity for oxygen reduction reaction via core-shell Au@Ag/Pd constructions.

Core-shell Au@Pd nanoparticles with enhanced catalytic activity for oxygen reduction reaction via core-shell Au@Ag/Pd constructions.
复制标题

核壳Au@Pd纳米粒子通过核壳Au@Ag/Pd结构增强氧还原反应的催化活性

DOI:
10.1038/srep11949
复制
发表时间:
2015-07-06
期刊:
影响因子:
4.6
通讯作者:
Yang J
Yang J
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Chen D;Li C;Liu H;Ye F;Yang J

文献摘要

参考文献

被引文献

相似文献

核-壳纳米颗粒通常由于在这些核-壳颗粒中产生的晶格应变而表现出改善的催化性质。在此,我们展示了从它们的核-壳Au@Ag/Pd母体合成核-壳Au@Pd纳米颗粒。该策略开始于在有机溶剂中制备核-壳Au@Ag纳米颗粒。然后,通过Ag壳与Pd 2+前体之间的电置换反应,将纯Ag壳转化为Ag/Pd合金壳。随后,使用饱和NaCl溶液从合金壳中除去Ag组分以形成具有Au核和Pd壳的核-壳Au@Pd纳米颗粒。与直接在Au种子和商业Pd/C催化剂上沉积Pd壳的核-壳Au@Pd纳米颗粒相比,通过其核-壳Au@Ag/Pd模板的核-壳Au@Pd纳米颗粒在催化氧还原反应中显示出上级的活性和耐久性,这主要是由于Au核和Ag去除引起的Pd壳中的较大的晶格拉伸效应。
Core-shell nanoparticles often exhibit improved catalytic properties due to the lattice strain created in these core-shell particles. Herein, we demonstrate the synthesis of core-shell Au@Pd nanoparticles from their core-shell Au@Ag/Pd parents. This strategy begins with the preparation of core-shell Au@Ag nanoparticles in an organic solvent. Then, the pure Ag shells are converted into the shells made of Ag/Pd alloy by galvanic replacement reaction between the Ag shells and Pd2+ precursors. Subsequently, the Ag component is removed from the alloy shell using saturated NaCl solution to form core-shell Au@Pd nanoparticles with an Au core and a Pd shell. In comparison with the core-shell Au@Pd nanoparticles upon directly depositing Pd shell on the Au seeds and commercial Pd/C catalysts, the core-shell Au@Pd nanoparticles via their core-shell Au@Ag/Pd templates display superior activity and durability in catalyzing oxygen reduction reaction, mainly due to the larger lattice tensile effect in Pd shell induced by the Au core and Ag removal.
DOI: 10.1021/nl034765r
发表时间: 2003-11-01
期刊: NANO LETTERS
影响因子: 10.8
作者:
Sun, YG;Xia, YN
通讯作者: Xia, YN
DOI: 10.1021/jp047349j
发表时间: 2004-11-18
影响因子: 3.3
作者:
Norskov, JK;Rossmeisl, J;Jónsson, H
通讯作者: Jónsson, H
DOI: 10.1039/c0ee00601g
发表时间: 2011-04-01
影响因子: 32.5
作者:
Morozan, Adina;Jousselme, Bruno;Palacin, Serge
通讯作者: Palacin, Serge
DOI: 10.1038/nchem.1030
发表时间: 2011-06-01
期刊: NATURE CHEMISTRY
影响因子: 21.8
作者:
Serpell, Christopher J.;Cookson, James;Beer, Paul D.
通讯作者: Beer, Paul D.
DOI: 10.1016/j.jelechem.2011.04.016
发表时间: 2011-07-15
影响因子: 4.5
作者:
Neergat, M.;Gunasekar, V.;Rahul, R.
通讯作者: Rahul, R.