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Energy & Environmental Science Vol - 5 Issue - 3

Energy & Environmental Science Vol - 5 Issue - 2

Energy & Environmental Science Vol -4

Energy & Environmental Science Vol -3

Energy & Environmental Science Vol -2

Energy & Environmental Science Vol -1

Palladium nanocrystals enclosed by {100} and {111} facets in controlled proportions and their catalytic activities for formic acid oxidation

Content Provider	Royal Society of Chemistry (RSC)
Author	Zhang, Hui Xia, Younan Xie, Zhaoxiong Jin, Mingshang
Copyright Year	2012
Abstract	This article reports a seed-mediated approach to polyhedral nanocrystals of Pd with controlled sizes, shapes, and different proportions of {100} to {111} facets on the surface. The success of this synthesis relies on the use of Pd nanocubes with different sizes as the seeds and the use of formaldehyde as a relatively mild reducing agent. By controlling the ratio of Pd precursor to the seed, we obtained uniform polyhedrons such as truncated cubes, cuboctahedrons, truncated octahedrons, and octahedrons in a purity approaching 100%. The sizes of these polyhedrons were determined by the edge length of the cubic seeds. Since these Pd polyhedrons were characterized by different proportions of {111} to {100} facets, they could serve as model catalysts to uncover the correlation between the surface structure and the catalytic performance for formic acid oxidation. Our measurements indicate that Pd nanocubes exhibited the highest maximum current density in the forward anodic scan, but the peak position was also located at a potential higher than those of the other polyhedrons. When both the current density and the operation potential are taken into consideration, Pd nanocubes with slight truncation at the corners become the best choice of catalyst for formic acid oxidation. Our study also revealed that the size of Pd polyhedrons had essentially no effect on the activity for formic acid oxidation.
Starting Page	6352
Ending Page	6357
Page Count	6
File Format	HTM / HTML PDF
ISSN	17545692
Volume Number	5
Issue Number	4
Journal	Energy & Environmental Science
DOI	10.1039/c2ee02866b
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Formaldehyde Redox Acid Current density
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Pollution Renewable Energy, Sustainability and the Environment Nuclear Energy and Engineering

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