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The promotional effect of Ni on bimetallic PtNi/C catalysts for glycerol electrooxidation

Paper ID Volume ID Publish Year Pages File Format Full-Text
40908 45870 2012 9 PDF Available
Title
The promotional effect of Ni on bimetallic PtNi/C catalysts for glycerol electrooxidation
Abstract

The electrocatalytic oxidation of glycerol was studied using carbon-supported 20 wt.% PtNi (PtNi/C) catalysts, which were prepared with different Pt:Ni atomic ratios from 3:1 to 1:1 using a colloidal method combined with a freeze-drying procedure. The bimetallic PtNi/C catalysts were characterized by various physicochemical analyses, including X-ray diffraction (XRD), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS), inductively coupled plasma-atomic emission spectroscopy (ICP-AES), and X-ray photoelectron spectroscopy (XPS). Cyclic voltammetry (CV) measurements indicated that the addition of Ni with a Pt catalyst significantly improved the electrocatalytic activity for glycerol electrooxidation. Among the tested catalysts, the Pt2Ni1/C catalyst had approximately 61% higher mass activity than the Pt/C catalyst. Structural modification via lattice parameter change and electronic modification in the unfilled d band states for Pt atoms may kinetically facilitate the electrooxidation of glycerol with an increased exchange current density over the PtNi/C catalysts.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (140 K)Download as PowerPoint slideHighlights► Addition of Ni with a Pt catalyst yields a bimetallic PtNi catalyst. ► The catalytic activity is influenced by the structural and electronic modification. ► The oxidation activity for glycerol is highly improved over the Pt2Ni1/C.

Keywords
PtNi catalysts; Electrocatalytic oxidations; Glycerol; Fuel cells; Biomass
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The promotional effect of Ni on bimetallic PtNi/C catalysts for glycerol electrooxidation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volumes 429–430, 2 July 2012, Pages 39–47
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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