Issue 8, 2002
From the journal:

Journal of Materials Chemistry

Synthesis and characterization of PtRu/C catalysts from microemulsions and emulsions

Zhaolin Liu,*a   Jim Yang Lee,bc   Ming Han,a   Weixiang Chenc  and  Leong Ming Gana  

* Corresponding authors

a Institute of Materials Research & Engineering, 3 Research Link, Singapore
E-mail: zl-liu@imre.org.sg

b Department of Chemical and Environmental Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore

c Singapore–MIT Alliance (SMA), National University of Singapore, 10 Kent Ridge Crescent, Singapore

Abstract

Nanosized PtRu catalysts supported on carbon have been synthesized from inverse microemulsions and emulsions using H2PtCl6 (0.025 M)/RuCl3 (0.025 M)/NaOH (0.025 M) as the aqueous phase, cyclohexane as the oil phase, and NP5 (poly(oxyethylene)5 nonyl phenol ether) or NP9 (poly(oxyethylene)9 nonyl phenol) as the surfactant, in the presence of Carbon Black suspended in a mixture of cyclohexane and NP5 + NP9. The titration of 10% HCHO aqueous solution into the inverse microemulsions and emulsions resulted in PtRu/C catalysts, in which the PtRu particles were nanometers in size. The catalysts were characterized by TEM, XRD and XPS and the metal particles were found to inherit the Pt fcc structure with Pt and Ru mostly in the zero valence oxidation states, amidst some Pt(II), Pt(IV) and Ru(IV). The cyclic voltammograms for methanol oxidation on these PtRu/C catalysts showed higher electrocatalytic activities for the two microemulsion derived catalysts than the emulsion-derived electrocatalyst.

Graphical abstract: Synthesis and characterization of PtRu/C catalysts from microemulsions and emulsions

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Article information

DOI
https://doi.org/10.1039/B200875K
Article type
Paper
Submitted
23 Jan 2002
Accepted
15 Apr 2002
First published
07 Jun 2002

J. Mater. Chem., 2002,12, 2453-2458

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Synthesis and characterization of PtRu/C catalysts from microemulsions and emulsions

Z. Liu, J. Y. Lee, M. Han, W. Chen and L. M. Gan, J. Mater. Chem., 2002, 12, 2453 DOI: 10.1039/B200875K

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