Please use this identifier to cite or link to this item:
|Title:||Template preparation of multisegment PtNi nanorods as methanol electro-oxidation catalysts with adjustable bimetallic pair sites|
|Citation:||Liu, F., Lee, J.Y., Zhou, W. (2004-11-18). Template preparation of multisegment PtNi nanorods as methanol electro-oxidation catalysts with adjustable bimetallic pair sites. Journal of Physical Chemistry B 108 (46) : 17959-17963. ScholarBank@NUS Repository. https://doi.org/10.1021/jp0472360|
|Abstract:||Multisegment PtNi nanorods (Ni-Pt, Ni-Pt-Ni, Ni-Pt-Ni-Pt, and Ni-Pt-Ni-Pt-Ni) with controllable lengths of the individual metals were obtained by sequential electrodeposition of the metals into the pores of anodic aluminum oxide (AAO) membranes. Field emission scanning electron microscopy (FESEM) showed that the nanorods are about 170 nm in diameter and 1.6 μm in length, with 530 nm of total Pt segment lengths. The alternating Pt and Ni segments could be easily differentiated by FESEM. XRD characterization of the PtNi nanorods indicated that both Pt and Ni are polycrystals with a face-centered cubic structure. The presence of Pt(0), Pt(II), Pt(IV), Ni(0), and Ni(II) on the surface of the PtNi nanorods was deduced from XPS measurements. The nanorods are catalytically active in the room temperature electro-oxidation of methanol. The relative rates of reaction as recorded by cyclic voltammetry showed a linear relationship between the peak current densities and the number of Pt-Ni interfaces. The use of segmented nanorods with identifiable Pt-Ni interfaces removes many of the ambiguities in the interpretation of experimental data from conventional alloy catalysts and has provided a direct demonstration of the role of pair sites in the bifunctional mechanism.|
|Source Title:||Journal of Physical Chemistry B|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Sep 17, 2018
WEB OF SCIENCETM
checked on Sep 5, 2018
checked on Aug 17, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.