Controllable assembly of Ag/C/Ni magnetic nanocables and its low activation energy dehydrogenation catalysis
Controllable assembly of Ag/C/Ni magnetic nanocables and its low activation energy dehydrogenation catalysis
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Ag/C/Ni磁性纳米电缆的可控组装及其低活化能脱氢催化
DOI：
10.1039/c2jm31311a
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发表时间：
2012-05
期刊：
影响因子：
--
通讯作者：
Peng, Jin
中科院分区：
文献类型：
--
作者：
Sun, Baolei;Zhou, Bo;Wu, Qingsheng;Peng, Jin
采用沉积包覆法将Ni纳米粒子包覆在Ag/C五棱柱纳米线上，制备了双层壳结构的Ag/C/Ni纳米电缆。通过扫描电子显微镜、透射电子显微镜、X射线衍射、X射线光电子能谱和紫外-可见吸收光谱证实了所提出的合成机理。所得的Ag/C/Ni纳米电缆的平均直径为约270 nm，由Ag NW核（直径约200 nm）与内部无定形C层（厚度约10 nm）和外部Ni壳（厚度约25 nm）组成。紫外-可见吸收光谱分析表明，Ni壳层对Ag/C纳米线芯的表面等离子体共振（SPR）有抑制作用，导致SPR吸收峰发生红移。特别是，与Ni纳米粒子相比，所制备的双层Ag/C/Ni磁性纳米电缆在常压下对氨水硼烷脱氢反应具有更高的催化活性，其活化能低于许多正丁醇催化剂.
Double-shelled Ag/C/Ni nanocables have been synthesized through a deposition covering process of Ni nanoparticles (NPs) onto Ag/C pentagonal prism nanowires (NWs). The proposed synthesis mechanism is corroborated by scanning electron microscopy, transition electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy and UV-vis absorption spectroscopy. The resulting Ag/C/Ni nanocables with an average diameter of ∼270 nm are made up of Ag NW core (∼200 nm diameter) with internal amorphous C layer (∼10 nm thickness) and outer Ni shell (∼25 nm thickness). The UV-vis absorption spectroscopy analysis indicates that the covering of the Ni shell on the Ag/C nanowire can dampen the surface plasmon resonance (SPR) of Ag wire core and lead to a red-shifted SPR absorption peak. In particular, compared with Ni NPs, the resultant double-shelled Ag/C/Ni magnetic nanocables exhibits higher catalytic activity for the dehydrogenation toward aqueous ammonia borane under ambient atmosphere, and its calculated activation energy is lower than those of many bimetallic catalysts.
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影响因子：
3.5
作者：
Huizhang Guo;Yuanzhi Chen;Xiaozhen Chen;R. Wen;G. Yue;D. Peng
通讯作者：
Huizhang Guo;Yuanzhi Chen;Xiaozhen Chen;R. Wen;G. Yue;D. Peng
Ni1-xPtx (x=0-0.12) 空心球作为氨硼烷制氢催化剂
影响因子：
4.6
作者：
Cheng, Fangyi;Ma, Hua;Chen, Jun
通讯作者：
Chen, Jun
影响因子：
9.2
作者：
Ingersoll, J. C.;Mani, N.;Muthaiah, A.
通讯作者：
Muthaiah, A.
DOI：
10.1002/cphc.201100429
发表时间：
2011-12
期刊：
Chemphyschem : a European journal of chemical physics and physical chemistry
影响因子：
--
作者：
M. Wen;Fan Zhang;Mingzhu Cheng;Qingsheng Wu;Baolei Sun;Yuzhen Sun
通讯作者：
M. Wen;Fan Zhang;Mingzhu Cheng;Qingsheng Wu;Baolei Sun;Yuzhen Sun
影响因子：
10.8
作者：
Poznyak, SK;Talapin, DV;Weller, H
通讯作者：
Weller, H