Palygorskite hybridized carbon nanocomposite as a high-performance electrocatalyst support for formic acid oxidation
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Date
2013
Journal Title
Journal ISSN
Volume Title
Publisher
South African Chemical Institute (SACI)
Abstract
A nanocomposite, in which acid-treated palygorskite was hybridized with carbon, was prepared and designed as an efficient
support for electrocatatlysts. Pd nanoparticles were deposited on the hybrid support as an electrocatalyst for formic acid oxidation.
The hybrid supports and electrocatalysts were characterized by X-ray diffraction (XRD), transmission electron microscopy
(TEM) and X-ray photoelectron spectroscopy (XPS).TEMandXRDresults showed that acid treatment had an effective impact on
the morphology of palygorskite, but did not destroy its architecture. XPS results indicated that the introduction of palygorskite
resulted in a negative shift of binding energy of Pd deposited on it. The electrochemical results showed that the addition of
palygorskite into the carbon facilitated the formation ofOHads orOads on the surface of Pd/C-PLS, and further improved the formic
acid electrooxidation activity. Therefore, considerable improvements in electrocatalytic activity toward formic acid oxidation was
achieved by using this hybrid support when compared with conventional carbon support, suggesting that the introduction
of SiO2-based porous palygoriskite was an excellent and cost-efficient way to improve the electrocatalytic performance of carbon
support.
Description
Keywords
Palygorskite, Electrocatalyst, Composite support, Formic acid electrooxidation
Citation
Wang, K. et al. (2013). Palygoskite hybridized carbon nanocomposite as a high-performance electrocatalyst support for formic acid oxidation. South African Journal of Chemistry, 66(1): 86 - 91